Concentrated sunlight for accelerated stability testing of organic photovoltaic materials: towards decoupling light intensity and temperature

被引:36
作者
Visoly-Fisher, I. [1 ,2 ]
Mescheloff, A. [1 ]
Gabay, M. [3 ]
Bounioux, C. [1 ]
Zeiri, L. [3 ]
Sansotera, M. [3 ]
Goryachev, A. E. [1 ]
Braun, A. [1 ]
Galagan, Y. [4 ]
Katz, E. A. [1 ,2 ]
机构
[1] Ben Gurion Univ Negev, Dept Solar Energy & Environm Phys, J Blaustein Inst Desert Res, IL-84990 Sede Boqer, Israel
[2] Ben Gurion Univ Negev, Ilse Katz Inst Nanosci & Technol, IL-84105 Beer Sheva, Israel
[3] Ben Gurion Univ Negev, Dept Chem, IL-84105 Beer Sheva, Israel
[4] Holst Ctr, NL-5605 KN Eindhoven, Netherlands
关键词
Concentrated sunlight; P3HT:PCBM; Stability; Organic photovoltaics; Degradation; SOLAR-CELLS; PHOTOINDUCED DEGRADATION; ACTIVE LAYERS; POLYMER; LIFETIME; PHOTO; P3HT; PHOTODEGRADATION; MINIREVIEW; MECHANISM;
D O I
10.1016/j.solmat.2014.11.033
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
We have demonstrated accelerated degradation studies of organic photovoltaic materials using concentrated sunlight, where the atmosphere, temperature and illumination intensity were independently controlled. Testing various schemes for controlling the sample temperature under concentrated sunlight showed that heating of P3HT:PCBM was caused by photons at the absorbed wavelength range and dissipation of excess photon energy, and not necessarily by IR photon absorption. Sunlight chopping was found to be an effective method for independent temperature control under illumination by concentrated sunlight. The first accelerated degradation tests using sunlight concentration applied to P3HT:PCBM blends were reported. P3HT:PCBM blends exposed to concentrated sunlight in the presence of traces of oxygen/humidity showed degradation induced by photo-oxidation of the P3HT backbone within the P3HT:PCBM blend, which is significantly thermally accelerated, in agreement with previous observations. However, this could be demonstrated in a time scale of minutes and hours, that is, significantly accelerated. Exposure of well encapsulated P3HT:PCBM films to concentrated sunlight demonstrated stability up to 3,600 sun*hours, corresponding to about 1.6 years of operating time. This result was obtained at 300 suns exposure after merely 12 h, demonstrating the advantage of using concentrated sunlight for accelerated stability tests. These tests can therefore combine extremely high acceleration factors with profound understanding of the effect of various, independently controlled factors on the degradation mechanisms. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:99 / 107
页数:9
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