Outdoor performance of organic photovoltaics: Diurnal analysis, dependence on temperature, irradiance, and degradation

被引:54
作者
Bristow, N. [1 ]
Kettle, J. [1 ]
机构
[1] Bangor Univ, Sch Elect Engn, Bangor, Gwynedd, Wales
关键词
POLYMER SOLAR-CELLS; MODULES; STABILITY; SILICON;
D O I
10.1063/1.4906915
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The outdoor dependence of temperature and diurnal irradiance on inverted organic photovoltaic (OPV) module performance has been analysed and benchmarked against monocrystalline-silicon (c-Si) photovoltaic technology. This is first such report and it is observed that OPVs exhibit poorer performance under low light conditions, such as overcast days, as a result of inflexion behaviour in the current-voltage curves, which limits the open-circuit voltage (V-OC) and fill factor. These characteristics can be removed by photo-annealing at higher irradiance levels, which occur diurnally as irradiance increases after sunrise. We also report the first temperature coefficients for OPVs from outdoor data; the OPV modules showed a positive temperature coefficient, which compared to a negative coefficient from the c-Si modules. Overall, the cell degradation outdoors appears very severe for these modules and highlights the need for improved barrier. (C) 2015 AIP Publishing LLC.
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页数:12
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