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Large Open-Circuit Voltage Polymer Solar Cells By Poly (3-Hexylthiophene) With Multi-Adducts Fullerenes, Xiong Gong, Tianzhi Yu, Yong Cao, Alan Heeger
Large Open-Circuit Voltage Polymer Solar Cells By Poly (3-Hexylthiophene) With Multi-Adducts Fullerenes, Xiong Gong, Tianzhi Yu, Yong Cao, Alan Heeger
Xiong Gong
Polymer solar cells (PSCs) made by poly(3-hexylthiophene) (P3HT) with multi-adducts fullerenes, [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM), PC61BM-bisadduct (bisPC61BM) and PC61BM-trisadduct (trisPC61BM), were reported. Electrochemistry studies indicated that PC61BM, bisPC61BM and trisPC61BM had step-up distributional lowest unoccupied molecular orbital (LUMO) energy. PSCs made by P3HT with above PC61BMs show a trend of enlarged open-circuit voltages, which is in good agreement with the energy difference between the LUMO of PC61BMs and the HOMO of P3HT. On the contrary, reduced short-circuit currents (J sc) were observed. The investigation of photo responsibility, dynamics analysis based on photo-induced absorption of composite films, P3HT:PC61BMs and n-channel …