基于苯并三噻吩共聚物/富勒烯衍生物的聚合物太阳能电池

以苯并三噻吩共聚物(BTT-BTz)为给体材料,具有不同能级结构的富勒烯衍生物为受体材料,通过共混方式制备光敏薄膜,并研究受体材料的能级结构对光伏器件开路电压(Voc)、短路电流(Jsc)、填充因子(FF)和电池效率(PCE)的影响.结果表明:当IC60BA为电子受体材料时,器件的Voc=1.06V,但Jsc较低,使得PCE仅为1.49%;当PC60BM和PC70BM为受体材料时,Voc分别为0.86V和0.81V,但Jsc较高,使得PCE分别为3.22%和5.06%.

Solar Cell Based on Benzotrithiophene Copolymer and Fullerene Derivative

The energy level of the electron acceptor plays an important role in bulk heterojunction solar cells. A conjugated polymer BTT-BT_zas electron donor and fullerene derivatives PC₇₀BM, PC₆₀BM and IC₆₀BA as acceptor with different energy levels was studied, and the influence of the acceptor energy level on the open circuit voltage (V_oc) , short circuit current density (J_sc), fill factor (FF) and power conversion efficiency (PCE) were investigated. The BTT BTz/IC₆₀BA based deviceexhibited a high V_oc of 1.06 V, but the poor PCE of 1.49% due to the lower J_sc. Although the V_oc of the devices based on BTT BTz/PC₆₀BM and BTT BTz/PC₇₀BM is decreased, they displayed promisingefficiencies of 322% and 5.06%.