Download or read book Composition and Interface Engineering for Efficient and Stable Inverted Perovskite Solar Cell written by Chen Hu and published by . This book was released on 2020 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Highly Efficient and Stable Lead free Perovskite Solar Cells Through Composition and Interface Engineering written by Gabriella A. Tosado and published by . This book was released on 2020 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar energy has the highest capacity to power our energy needs sustainably without emitting greenhouse gases. Hybrid organic-inorganic lead halide perovskite solar cells (PVSCs) have emerged in the past decade as a promising low-cost, low energy intensity, thin film solar cell with lab efficiencies reaching 25.2%. The toxicity of Pb perovskites and performance and stability issues with Sn lead-free alternatives remains a major roadblock to commercialization. In this work, novel perovskite compositions are designed and used to study the transition from Pb to Sn perovskites, cations are tuning to implement stabilizing components for pure Sn perovskites, and Sn perovskites performance and stability issues are tackled. The triple cation methylammonium (MA), formamidinium (FA) and Cs, with double halide composition Csx(MA0.17FA0.83)1-xPb1-ySny(I0.83Br0.17)3 films with x = 0.05, 0.10, and 0.20 and y = 0, 0.25, 0.50, 0.75, and 1.0 was used to create a library of new perovskites and study novel band gap trends near the maximum Schockley Quiesser limit. The simple inverted device structure of indium tin oxide (ITO)/poly (3,4, -ethylenedioxythiphene): polystyrene sulfonate (PEDOT:PSS)/Perovskite/[6,6]-phenyl-C60-butyric acid methyl ester (PC60BM)/fullerene (C60)/2,9-dimethyl-7,7-diphenyl-1,10-phenanthroline (BCP)/Ag eliminated dopant instabilities. Due to a high-quality film morphology and optimal bandgap, 3 3 Cs0.05(MA0.17FA0.83)0.95Pb0.25Sn0.75(I0.83Br0.17)3 (band gap = 1.30 eV), achieved a record maximum efficiency of 11.05% for any 75% Sn composition. Moreover, the 75% Sn PVSCs retained 80% of initial PCE after 30 days storage in inert conditions and 100 hours in ambient conditions. After optimizing antisolvent choice, solvent annealing, and hot casting conditions for pure Sn perovskite films, the novel composition with Cs, FA, and guanidinium (GA), (CsGA)xFA100 2xSnI3 was implemented. This cation mixture combines the benefits of a guanidinium cation, such as increased hydrogen bonding and no dipole moment, with Cs to fill point defects and relax the crystal lattice to better integrate a large stabilizing agent, ethylenediammonium diiodide (EDAI2). The EDAI2 additive not only yielded pinhole-free cubic phase (CsGA)xFA100-2xSnI3 perovskite films but also decreased both shallow and deep trap states in the perovskite films. The devices with (CsGA)15FA70SnI3 and 0-2% EDAI2 all achieved a maximum PCE higher than 5% with the highest of 5.72% for a fresh device with (CsGA)15FA70SnI3 and 1% EDAI2. After storage, the maximum PCE was increased from 5.69% to 6.39% for the (CsGA)15FA70SnI3 and 1.5% EDAI2 devices. Finally, to tackle energy loss issues that have plagued pure Sn perovskites (loss = 0.6-0.9 V), the misalignment between the PEDOT:PSS hole transport layer and the Sn perovskite valence band was studied due to the energy misalignment between the hole transport layer and pure Sn perovskite valence band. Cosolvent methods, solvent wash methods, and solvent immersion methods with DMSO, EG, and CH3OH were implemented to alter the PSS content and work function of the HTL to improve alignment. Utilizing the (CsGA)15FA70SnI3+1.0% EDAI2 perovskite film we demonstrated a higher performance of 6.29% and 6.16% with a 5% DMSO cosolvent and methanol solvent wash, respectively. This work is a comprehensive push to improve the performance and stability of non-toxic Sn perovskite devices, bringing this technology one step closer to commercialization.
Download or read book Composition and Interface Engineering for Stable and Highly Efficient Wide Bandgap Perovskite Solar Cells written by 劉田田 and published by . This book was released on 2020 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interface Engineering of Inverted Perovskite Solar Cells to Enhance Photovoltaic Performance and Stability written by 王彦涛 and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Cells and Modules written by Arvind Shah and published by Springer Nature. This book was released on 2020-07-16 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive introduction to the field of photovoltaic (PV) solar cells and modules. In thirteen chapters, it addresses a wide range of topics including the spectrum of light received by PV devices, the basic functioning of a solar cell, and the physical factors limiting the efficiency of solar cells. It places particular emphasis on crystalline silicon solar cells and modules, which constitute today more than 90 % of all modules sold worldwide. Describing in great detail both the manufacturing process and resulting module performance, the book also touches on the newest developments in this sector, such as Tunnel Oxide Passivated Contact (TOPCON) and heterojunction modules, while dedicating a major chapter to general questions of module design and fabrication. Overall, it presents the essential theoretical and practical concepts of PV solar cells and modules in an easy-to-understand manner and discusses current challenges facing the global research and development community.
Download or read book Efficient Stable Perovskite Solar Cells Enabled by Electrode Interface Engineering and Nanoscale Phase Stabilization written by Erin M. Sanehira and published by . This book was released on 2017 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconducting metal halide perovskites have emerged as a promising solution-processable, photovoltaic material with research cell power conversion efficiencies now exceeding 22% under simulated sunlight. The prototypical composition of this “ABX3” semiconductor is CH3NH3PbI3, in which organic methylammonium cations charge stabilize lead iodide octahedra. Research is underway on mixed component systems with A-site cation combinations of methylammonium, formamidinium, cesium, and rubidium; B-site cations of Pb2+ and Sn2+; and iodide, bromide and chloride anions. Although perovskite solar cells with low-cost fabrication methods have demonstrated impressive power conversion efficiencies, device durability remains a key concern of the technology. In this dissertation, the effect of the anode electrode material on the device lifetime is characterized under constant operating conditions. It is demonstrated that MoOx/Al electrodes are more stable than commonly used Au or Ag electrodes. Interestingly, the enhanced stability of MoOx/Al electrodes is due to the formation of an oxide at the MoOx/Al interface, which likely prevents ion migration between the device layers, as opposed to encapsulation from environmental agents. I also demonstrate a more stable photoactive layer comprised of CsPbI3 quantum dots (QDs). CsPbI3 is the lowest bandgap, all-inorganic lead halide perovskite, and has shown remarkable chemical and thermal stability up to 400 °C. However, bulk and thin film CsPbI3 transitions to the undesired orthorhombic phase when cooled to room temperature. CsPbI3 QDs have unique surface properties which alter the phase transitions and successfully maintain the photoactive cubic phase at room temperature and even well below. In addition to reporting the first demonstration of an all-inorganic CsPbX3 nanocrystal solar cell, I also detail new QD surface treatments that improve the short circuit current density of the devices by doubling the QD film mobility. These advancements led to an NREL-certified QD solar cell efficiency of 13.43% that is currently the record efficiency reported for a QD solar cell of any material system. In this dissertation, I assess operational stability of thin film organic-inorganic perovskite solar cells, fabricate more durable electrodes, develop novel CsPbI3 QD photovoltaic devices and discover new surface modifications to improve charge transport in efficient perovskite QD solar cells.
Download or read book Interface and Composition Engineering Towards Stable and Efficient Organic inorganic Perovskite Solar Cells written by Haiwei Chen and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interface Engineering and Morphology Study of Thin Film Organic Inorganic Halide Perovskite Optoelectronic Devices written by Lei Meng and published by . This book was released on 2017 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar energy harvesting through photovoltaic conversion has gained great attention as a sustainable and environmentally friendly solution to meet the rapidly increasing global energy demand. Currently, the high cost of solar-cell technology limits its widespread use. This situation has generated considerable interest in developing alternative solar-cell technologies that reduce cost through the use of less expensive materials and processes. Perovskite solar cells provide a promising low-cost technology for harnessing this energy source. In Chapter two, a moisture-assist method is introduced and studied to facilitate grain growth of solution processed perovskite films. As an approach to achieve high-quality perovskite films, I anneal the precursor film in a humid environment (ambient air) to dramatically increase grain size, carrier mobility, and charge carrier lifetime, thus improving electrical and optical properties and enhancing photovoltaic performance. It is revealed that mild moisture has a positive effect on perovskite film formation, demonstrating perovskite solar cells with 17.1% power conversion efficiency. Later on, in Chapter four, an ultrathin flexible device delivering a PCE of 14.0% is introduced. The device is based on silver-mesh substrates exhibiting superior durability against mechanical bending. Due to their low energy of formation, organic lead iodide perovskites are also susceptible to degradation in moisture and air. The charge transport layer therefore plays a key role in protecting the perovskite photoactive layer from exposure to such environments, thus achieving highly stable perovskite-based photovoltaic cells. Although incorporating organic charge transport layers can provide high efficiencies and reduced hysteresis, concerns remain regarding device stability and the cost of fabrication. In this work, perovskite solar cells that have all solution-processed metal oxide charge transport layers were demonstrated. Stability has been significantly improved compared with cells made with organic layers. Degradation mechanisms were investigated and important guidelines were derived for future device design with a view to achieving both highly efficient and stable solar devices. Organometal halide based perovskite material has great optoelectronic proprieties, for example, shallow traps, benign grain boundaries and high diffusion length. The perovskite LEDs show pure electroluminescence (EL) with narrow full width at half maximum (FWHM), which is an advantage for display, lighting or lasing applications. In chapter five, perovskite LEDs are demonstrated employing solution processed charge injection layers with a quantum efficiency of 1.16% with a very low driving voltage.
Download or read book Development of High performance and Stable Inverted Perovskite Solar Cells Via Multifunctional Interface and Bulk Defects Engineering written by 馬瑞曼 and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Perovskite Solar Cells written by Rajan Jose and published by Elsevier. This book was released on 2024-09-02 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perovskite Solar Cells: Prospects of Commercialization considers the challenges, technological barriers, and opportunities facing the commercialization of perovskite solar cells. First, the book provides a brief overview of the history of perovskite solar cells in the context of the rise of photovoltaics, and an overview of materials systems being considered for these technologies. Then, five main aspects of commercialization are examined, including performance, processability, sustainability, potential applications, and economics. The materials properties, including their merits and drawbacks, are discussed along with their relationship to commercial viability with the aim of identifying gaps for further growth in the area. This book is suitable for materials scientists and engineers in academia and industrial R&D interested. Introduces perovskite solar cells in photovoltaics along with materials, fabrication methods, and devices Reviews materials systems for perovskite solar cell technologies and their relationship to factors that impact commercial viability (performance, cost, large-scale production, and sustainability) Discusses potential pathways for overcoming barriers to commercialization
Download or read book Development of Efficient Wide bandgap Perovskite Solar Cells with Composition and Interface Engineering written by Khan Mamun Reza and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency and Stable Carbon Based Planar Perovskite Solar Cells written by Vijayaraghavan Sankaranarayanan Nair and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perovskite solar cells (PSCs) have attracted much attention both in research and industrial domains. The power conversion efficiencies (PCE) of PSCs have been improved from 3.8% to 25.8% in just over a decade, rivaling that of silicon solar cells. Hybrid perovskite materials have exceptional optoelectrical properties and can be processed using cost-effective solution-based methods. In contrast, the fabrication of silicon solar cells requires high-vacuum, high-temperature, and energy-intensive processes. The combination of excellent optoelectrical properties and cost-effective manufacturing makes hybrid perovskite a winning candidate for solar cells.As the PCE of PSCs improves and their long-term stability increases, one of the crucial hurdles to be addressed is the cost-effective scalable fabrication and its long-term stability. Most high-efficiency solar cells require an energy-consuming method of depositing the cathode to complete the cell. These high-efficiency devices also require highly expensive noble metal electrodes. Herein, following recommendations from the literature, carbon-based nanomaterials are utilized, and their effects on the efficiency, fill factor (FF), open-circuit voltage (Voc), and short circuit density (Jsc) are analyzed. The PSCs and carbon counter electrodes are fabricated at low temperatures (~100 degrees Celsius). As per the literature, carbon-based devices exhibited an efficiency of >19%. This endeavor further buttresses the fact that carbon nanomaterials are promising candidates for the future of low-cost, high-performance, and scalable production of PSCs. Thus, complex vacuum deposition of expensive cathodes to complete the cells might be eliminated.In this thesis, I focus on several novel interface engineering techniques, that can reduce the surface roughness of the carbon electrode, and improve the interface it forms with the underlying layer. These interfacial engineering techniques improved the charge collection efficiency of the carbon, and thereby reduced the recombination happening at the interface. As a result, the PCE could be enhanced from ~13% to >18%.In addition to these techniques, a high-quality narrow band gap perovskite layer was developed with low dimensional 2D perovskite passivation to further improve the device performance. Together with the improved perovskite film quality and optimized film composition, along with interface engineered carbon electrode, an impressive PCE of >21% was attained.
Download or read book Additive and Interface Engineering of Lead tin Mixed Low bandgap Perovskite Solar Cells for Higher Efficiency and Improved Stability written by Nabin Ghimire and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High performance Perovskite Solar Cells by Active Layer Composition Engineering written by Lening Shen and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past 10 years, perovskite solar cells (PSCs) have drawn great attention in both academic and industrial sectors. Over 25.5% power conversion efficiency (PCE) has been reported from PSCs by three-dimensional (3D) methylammonium lead iodide (CH3NH3PbI3 or MAPbI3). However, the previous studies have indicated that PSCs exhibited poor stability. Thus, to commercialize PSCs, the development of efficient and stable PSCs is required. In this study, we reported two approaches to develop efficient and stable PSCs. One was to develop novel all-inorganic perovskites, where Pb2+ was partially heterovalently substituted Nd3+. Another was to develop PSCs with a bulk heterojunction (BHJ) device structure. In the first approach, it was found that the CsPbI2Br:xNd3+ thin films possess enhanced charge carrier mobilities, superior crystallinity, and enlarged crystal sizes, but with enlarged optical bandgaps. As a result, PSCs by the CsPbI2Br:xNd3+ thin films exhibit more than 20% enhanced PCEs and boosted stability compared to those by pristine CsPbI2Br thin film. To further boost the device performance of PSCs, solution-processed 4-lithium styrenesulfonic acid/styrene copolymer (LiSPS) is utilized as the passivation layer. PSCs by the CsPbI2Br:xNd3+/LiSPS bilayer thin film possesses reduced charge extraction lifetime and suppressed charge carrier recombination, resulting in 17.05% PCE and dramatically boosted stability compared to that without the LiSPS passivation layer. All these results indicate that we develop a facile way to approach high-performance PSCs by all-inorganic perovskite materials. In the second approach, we found that all-inorganic perovskite incorporated with low bandgap conjugated polymers, forming BHJ composite thin film possesses balanced and enhanced charge mobilities, superior film morphology with enlarged crystal sizes, and suppressed trap density As a result, BHJ PSCs exhibited a 21.08% PCEs, which is more than 16% enhancement compared to that without incorporated with low bandgap conjugated polymers. Moreover, BHJ PSCs possess suppressed photocurrent hysteresis and enhanced device stability. All these results demonstrate that the development of BHJ PSCs is one of the facil ways to approach high-performance PSCs.
Download or read book Perovskite Solar Cells written by Shahzada Ahmad and published by John Wiley & Sons. This book was released on 2022-03-14 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents a thorough overview of perovskite research, written by leaders in the field of photovoltaics The use of perovskite-structured materials to produce high-efficiency solar cells is a subject of growing interest for academic researchers and industry professionals alike. Due to their excellent light absorption, longevity, and charge-carrier properties, perovskite solar cells show great promise as a low-cost, industry-scalable alternative to conventional photovoltaic cells. Perovskite Solar Cells: Materials, Processes, and Devices provides an up-to-date overview of the current state of perovskite solar cell research. Addressing the key areas in the rapidly growing field, this comprehensive volume covers novel materials, advanced theory, modelling and simulation, device physics, new processes, and the critical issue of solar cell stability. Contributions by an international panel of researchers highlight both the opportunities and challenges related to perovskite solar cells while offering detailed insights on topics such as the photon recycling processes, interfacial properties, and charge transfer principles of perovskite-based devices. Examines new compositions, hole and electron transport materials, lead-free materials, and 2D and 3D materials Covers interface modelling techniques, methods for modelling in two and three dimensions, and developments beyond Shockley-Queisser Theory Discusses new fabrication processes such as slot-die coating, roll processing, and vacuum sublimation Describes the device physics of perovskite solar cells, including recombination kinetics and optical absorption Explores innovative approaches to increase the light conversion efficiency of photovoltaic cells Perovskite Solar Cells: Materials, Processes, and Devices is essential reading for all those in the photovoltaic community, including materials scientists, surface physicists, surface chemists, solid state physicists, solid state chemists, and electrical engineers.
Download or read book Device Interface Process and Electrode Engineering Towards Low Cost and High Efficiency Polymer Solar Cells in Inverted Structure written by Jingyu Zou and published by . This book was released on 2013 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a promising technology for economically viable alternative energy source, polymer solar cells (PSCs) have attracted substantial interests and made significant progress in the past few years, due the advantages of being potentially easily solution processed into large areas, flexible, light weight, and have the versatility of material design. In this dissertation, an integrated approach is taken to improve the overall performance of polymer solar cells by the development of new polymer materials, device architectures, interface engineering of the contacts between layers, and new transparent electrodes. First, several new classes of polymers are explored as potential light harvesting materials for solar cells. Processing has been optimized and efficiency as high as 6.24% has been demonstrated. Then, with the development of inverted device structure, which has better air stability by utilizing more air stable, high work function metals, newly developed high efficiency polymers have been integrated into inverted structure device with integrated engineering approach. A comprehensive characterization and optical modeling based on conventional and inverted devices have been performed to understand the effect of device geometry on photovoltaic performance based on a newly developed high performance polymer poly(indacenodithiophene-co-phananthrene-quinoxaline) (PIDT-PhanQ). By modifying anode with a bilayer combining graphene oxide (GO) and poly(3,4-ethylenedioxylenethiophene):poly(styrenesulfonic acid) (PEDOT:PSS) as hole transporter/electron blocker, it further improved device performance of inverted structured to 6.38%. A novel processing method of sequentially bilayer deposition for active layer has been conducted based on a low band-gap polymer poly[2, 6-(4, 4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-bʹ] dithiophene)-alt-4,7-(2, 1, 3- fluorobenzothiadiazole)] (PCPDT-FBT). Inverted structure devices processed from bilayer deposition shows even higher performance than bulk-heterojunction. Polymer and fullerene distribute uniformly throughout the layer in vertical direction. Better electron mobility and better crystallinity in inverted bilayer film bas been observed, which can contribute to the higher IQE in inverted bilayer device. Metal grid/conducting polymer hybrid transparent electrode has been proved can be an alternative to ITO in inverted structure with similar device performance. Further, a novel protocol to fabricate highly transparent ultra thin silver films as transparent electrode on both glass and plastic substrates also has been demonstrated, based on ZnO/Ag/ZnO tri-layer structure and self-assembled monolayer interfacial modification. Sophisticated interfacial engineering method is applied at necessary interfaces to functioning the ultra thin silver film as a platform for polymer solar cells, and superior device performance that even exceeds using ITO has been achieved.
Download or read book Printable Mesoscopic Perovskite Solar Cells written by Hongwei Han and published by John Wiley & Sons. This book was released on 2023-06-07 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Printable Mesoscopic Perovskite Solar Cells A comprehensive exploration of printable perovskite solar cells and their potential for commercialization In Printable Mesoscopic Perovskite Solar Cells, a team of distinguished researchers delivers an accessible and incisive discussion of the principles, technologies, and fabrication processes associated with the manufacture and use of perovskite solar cells. The authors detail the properties, characterization methods, and technologies for halide perovskite materials and devices and explain printable processing technologies, mesoscopic anode and cathodes, and spacer layers for printable perovskite solar cells. In the book, you’ll find expansive discussions of the stability issues inherent in perovskite solar cells and explore the potential for scaling and commercializing the printing of perovskite solar cells, complete with real-world industry data. Readers will also find: A thorough introduction to the background and fundamentals of perovskite solar cells Comprehensive explorations of the characterization methods and technologies used with halide perovskite materials and devices Practical discussions of printable processing technologies for perovskite solar cells Fulsome treatments of the stability issues associated with perovskite solar cells and potential solutions for them Perfect for materials scientists, solid state physicists and chemists, and electronics engineers, Printable Mesoscopic Perovskite Solar Cells will also benefit surface chemists and physicists.
