Monitoring outdoor performance and photodegradation of a-Si:H modules by evaluation of continuously measured I-V curves

Author

Kleiss, G. ; Bücher, K. ; Ragot, P. ; Chantant, M.

Author_Institution

Fraunhofer-Inst. fur Solare Energiesysteme, Freiburg, Germany

Volume

1

fYear

1994

fDate

5-9 Dec 1994

Firstpage

531

Abstract

The performance of a-Si:H modules is frequently and continuously monitored during outdoor operation. The simple constant field approximation (three parameters) is applied to fit the I-V curves. Indoor measurements demonstrate the sensitivity of the proposed method to monitor photodegradation. The evaluation of outdoor measurements proves that, with the proposed method, the effect of degradation can be isolated from the effects of temperature and irradiance dependent outdoor behavior of the a-Si:H module. The proposed method relates the overall defect density in the module with its outdoor performance and degradation state

Keywords

amorphous semiconductors; defect states; elemental semiconductors; hydrogen; semiconductor device testing; silicon; solar cell arrays; solar cells; PV modules; Si:H; a-Si:H solar cells; amorphous semiconductor; continuously measured I-V curves; degradation state; indoor measurements; irradiance dependent outdoor behavior; monitoring; outdoor measurements; outdoor performance; overall defect density; photodegradation; simple constant field approximation; Degradation; Energy measurement; Laboratories; Lighting; Monitoring; Poisson equations; Solar energy; Stability criteria; Temperature dependence; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on

Conference_Location

Waikoloa, HI

Print_ISBN

0-7803-1460-3

Type

conf

DOI

10.1109/WCPEC.1994.520015

Filename

520015