Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells written by Clemson University and published by . This book was released on 1978 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of reliability attributes and accelerated stress factors on terrestrial solar cells written by Clemson University and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Reliability Attributes Accelerated Stress Factors on Terrestrial Solar Cells written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of reliability attributes and accelerated stress factors on terrestrial solar cells written by Clemson University. Department of Electrical and Computer Engineering and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells written by Clemson University and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Ares Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells written by J. W. Lathrop and published by . This book was released on 1981 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Area Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells written by J. W. Lathrop and published by . This book was released on 1980 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Area Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells written by J. W. Lathrop and published by . This book was released on 1980 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells Second Quarterly Report March 9 1978 June 9 1978 written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to perform investigations of factors involved in the reliability of terrestrial solar cells and to develop specifications for an Accelerated Stress Testing Schedule for solar cells. Very little was known prior to this program concerning the nature of the time-to-failure (TTF) distributions of solar cells in terrestrial ambient conditions, the failure modes and failure mechanisms which control the TTF distributions, the appropriate methods for accelerated stress testing for reliability verification, or technology verification or the process modifications which might be required to upgrade reliability performance. The program reported represents a first attempt to define these reliability attributes for individual, unencapsulated terrestrial solar cell devices. The program is intended not merely to establish the base-line reliability characteristics for present state-of-the-art cells, but to also establish methodology to both permit intercomparison of available cells and permit evaluation of cell structures which will be developed in the future. Results are presented including (1) establishment of a cell electrical measurement capability with repeatability of better than +-1% (2) progress on stress testing and measurement and (3) design and progress on fabrication of jigs and fixturing for stress testing. Considerable progress was made toward prestress electrical measurement of cell test populations. Delivery was taken of the final items of stress test equipment.
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells Sixth Quarterly Report July 1 October 1 1979 written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results obtained during the reporting period include the identification of need for a short-interval solar cell tester and the definition of such a tester, the acquisition of significant amounts of data on stress-tested cells of two types from most of the planned stress tests, and progress in understanding the types of measurements and methods of measurement appropriate for study of second quadrant cell characteristics. Cells subjected to B-T stress testing at 75/sup 0/C showed very little P/sub m/ degradation after 1200 to 2500 stress hours. Cells stressed at higher temperatures showed greater degradation; this was especially true of cells subjected to 150/sup 0/C B-T stress. Significant P/sub m/ degradation was observed for pressure cooker T-H stressed cells. Bias was observed to be an accelerating factor for 85/sup 0/C/85% R.H. T-H stress, but not for pressure cooker T-H stress.
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells First Quarterly Report December 9 1977 March 8 1978 written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A description of the stress test facility, development of stress testing methods and procedures, the test plan, and some preliminary results are included. (MHR).
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells Second Annual Report written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work covered in this report represents the second year's effort of a continuing program to determine the reliability attributes of terrestrial solar cells. Three main tasks were undertaken during the reporting period: (1) a study of the electrical behavior of cells in the second (reverse) quadrant, (2) the accelerated stress testing of three new state of the art cells and (3) the continued bias-temperature testing of four Block II type silicon cells at 78/sup 0/C and 135/sup 0/C. Electrical characteristics measured in the second quadrant were determined to be a function of the cell's thermal behavior with breakdown depending on the initiation of localized heating. This implied that high breakdown cells may be more fault tolerant when forced to operate in the second quadrant - a result contrary to conventional thinking. The accelerated stress tests used in the first (power) quadrant were bias-temperature, bias-temperature-humidity, temperature-humidity, thermal shock, and thermal cycle. The new type cells measured included an EFG cell, a polycrystalline cell, and a Czochralski cell. Electrical parameters measured included I/sub SC/, V/sub OC/, P/sub M/, and I/sub M/. Incorporated in the report are the distributions of prestress electrical data for all cell types. Significant differences in the response to the various stress tests were observed between cell types. A microprocessed controlled, short interval solar cell tester was designed and construction initiated on a prototype for use in the program.
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells First Annual Report written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of accelerated stress testing of four different types of silicon terrestrial solar cells are discussed. The accelerated stress tests used included bias-temperature tests, bias-temperature-humidity tests, thermal cycle and thermal shock tests, and power cycle tests. Characterization of the cells was performed before stress testing and at periodic down-times, using electrical measurement, visual inspection, and metal adherence pull tests. Electrical parameters measured included short-circuit current, I/sub sc/, open circuit voltage, V/sub oc/, and output power, voltage, and current at the maximum power point, P/sub m/, V/sub m/, and I/sub m/ respectively. Incorporated in the report are the distributions of the prestress electrical data for all cell types. Data was also obtained on cell series and shunt resistance. Significant differences in the response to the various stress tests was observed between cell types. On the basis of the experience gained in this research work, a suggested Reliability Qualification Test Schedule was developed.
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells Third Annual Report written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The third year of the accelerated reliability testing program concentrated on electrical measurement instrumentation and in modeling cell behavior in the second quadrant. In addition, some preliminary work was done on correlating cell color changes with electrical degradation. Not reported are results of continuing accelerated stress tests on state of the art cells. A number of new cells were added to the program, but not in time for sufficient data to be obtained, while the older cells are undergoing extended test periods and new data are not yet available on them. The all-digital, microprocessor controlled, short interval tester, which was designed and fabricated, has replaced the manual measurement procedure formerly used. This has improved measurement accuracy and repeatability, reduced measurement time, and through coordinated data management procedures, eliminated data errors. A complete description of the tester including schematics and software is given and its operating procedures described. A computer model, based on the thermal and electrical properties of the cells and encapsulating materials, was developed to relate cell temperature to electrical characteristics in the second quadrant. This model adequately predicted the behavior of both encapsulated and unencapsulated cells, although accurate temperature measurements on encapsulated cells were difficult to obtain. In addition, only cells of one type were used for comparison and other cell types may require different parameter values for fitting. Use of the model should permit the prediction of a cell's sensitivity to degradation in the second quadrant. The computer program is listed together with a description of its operation.
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells written by Clemson University and published by . This book was released on 1978 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Reliability Attributes and Accelerated Stress Factors on Terrestrial Solar Cells Third Quarter Report June 9 September 9 1978 written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of the third quarter of work on the program Investigation of Reliability Attributes and Accelerated Stress Factors of Terrestrial Solar Cells include completing all Phase I tests except for Thermal Shock. Results of these preliminary tests are used to define the larger quantity Phase II tests and a number of these were begun during the quarter. A program was initiated to observe the effects of accelerated testing on cell metalization adherence. Degradation of electrical performance was observed on one type of cell after B-T testing. Mechanical fracturing was observed in two types of cells after thermal cycling.
