Abstract
Herein, we present an efficient approach for screening the intrinsic photostability of organic absorber materials used in photovoltaic applications. Using a series of structurally related conjugated polymers and a set of complementary techniques, we established important "material structure-photostability" relationships. In particular, we have revealed that the introduction of alkoxy, thioalkyl, and fluorine substituents adversely affects the material photostability. Further systematic screening of different types of materials using the developed techniques should yield a set of guidelines for designing more stable absorber materials for organic solar cells.
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