Preliminary temperature accelerated life test (ALT) on III-V commercial concentrator triple-junction solar cells
A quantitative temperature accelerated life test on sixty GaInP/GaInAs/Ge triple-junction commercial concentrator solar cells is being carried out. The final objective of this experiment is to evaluate the reliability, warranty period, and failure mechanism of high concentration solar cells in a mod...
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Published in | 2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2 pp. 1 - 6 |
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Main Authors | , , , , , , , , , |
Format | Conference Proceeding |
Language | English |
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IEEE
01.06.2012
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Abstract | A quantitative temperature accelerated life test on sixty GaInP/GaInAs/Ge triple-junction commercial concentrator solar cells is being carried out. The final objective of this experiment is to evaluate the reliability, warranty period, and failure mechanism of high concentration solar cells in a moderate period of time. The acceleration of the degradation is realized by subjecting the solar cells at temperatures markedly higher than the nominal working temperature under a concentrator, while the photo-current nominal conditions are emulated by injecting current in darkness. Three experiments at three different temperatures are necessary in order to obtain the acceleration factor which relates the time at the stress level with the time at nominal working conditions. However, up to now only the test at the highest temperature has finished. Therefore, we can not provide complete reliability information but we have analyzed the life data and the failure mode of the solar cells inside the climatic chamber at the highest temperature. The failures have been all of them catastrophic. In fact, the solar cells have turned into short circuits. We have fitted the failure distribution to a two parameters Weibull function. The failures are wear-out type. We have observed that the busbar and the surrounding fingers are completely deteriorated. |
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AbstractList | A quantitative temperature accelerated life test on sixty GaInP/GaInAs/Ge triple-junction commercial concentrator solar cells is being carried out. The final objective of this experiment is to evaluate the reliability, warranty period, and failure mechanism of high concentration solar cells in a moderate period of time. The acceleration of the degradation is realized by subjecting the solar cells at temperatures markedly higher than the nominal working temperature under a concentrator, while the photo-current nominal conditions are emulated by injecting current in darkness. Three experiments at three different temperatures are necessary in order to obtain the acceleration factor which relates the time at the stress level with the time at nominal working conditions. However, up to now only the test at the highest temperature has finished. Therefore, we can not provide complete reliability information but we have analyzed the life data and the failure mode of the solar cells inside the climatic chamber at the highest temperature. The failures have been all of them catastrophic. In fact, the solar cells have turned into short circuits. We have fitted the failure distribution to a two parameters Weibull function. The failures are wear-out type. We have observed that the busbar and the surrounding fingers are completely deteriorated. |
Author | Araki, K. Bautista, J. Espinet-Gonzalez, P. Algora, C. Nunez, N. Orlando, V. Vazquez, M. Barrutia, L. Rey-Stolle, I. Xiugang, H. |
Author_xml | – sequence: 1 givenname: P. surname: Espinet-Gonzalez fullname: Espinet-Gonzalez, P. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 2 givenname: K. surname: Araki fullname: Araki, K. organization: Daido Steel Co., Minami, Nagoya, Japan – sequence: 3 givenname: C. surname: Algora fullname: Algora, C. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 4 givenname: V. surname: Orlando fullname: Orlando, V. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 5 givenname: N. surname: Nunez fullname: Nunez, N. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain, EUIT de Telecomunicacion, Universidad Politecnica de Madrid, Madrid, 28031, Spain – sequence: 6 givenname: M. surname: Vazquez fullname: Vazquez, M. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain, EUIT de Telecomunicacion, Universidad Politecnica de Madrid, Madrid, 28031, Spain – sequence: 7 givenname: J. surname: Bautista fullname: Bautista, J. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 8 givenname: H. surname: Xiugang fullname: Xiugang, H. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 9 givenname: L. surname: Barrutia fullname: Barrutia, L. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain – sequence: 10 givenname: I. surname: Rey-Stolle fullname: Rey-Stolle, I. organization: Instituto de Energía Solar, Universidad Politecnica de Madrid, Madrid, 28040, Spain |
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Snippet | A quantitative temperature accelerated life test on sixty GaInP/GaInAs/Ge triple-junction commercial concentrator solar cells is being carried out. The final... |
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SubjectTerms | Accelerated life test Acceleration ALT concentrator CPV Current density III-V Life estimation Photovoltaic cells Photovoltaics Reliability solar cells Stress Temperature |
Title | Preliminary temperature accelerated life test (ALT) on III-V commercial concentrator triple-junction solar cells |
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