2,2-Dicyanovinyl-end-capped oligothiophenes as electron acceptor in solution processed bulk-heterojunction organic solar cells
作者:Jianchang Wu、Yuchao Ma、Na Wu、Yi Lin、Jian Lin、Lilei Wang、Chang-Qi Ma
DOI:10.1016/j.orgel.2015.04.003
日期:2015.8
ELUMO = −2.91 eV). Solution processed bulk heterojunction “all-thiophene” solar cells using P3HT as electron donor and the above mentioned oligothiophenes as electron acceptor were fabricated and tested. The highest power conversion efficiency (PCE) of 1.31% was achieved for DTSi-cored compound DTSi(THDCV)2, whereas PTB7:DTSi(THDCV)2 based device showed slightly higher PCE of 1.56%. Electron mobilities of
含有二噻吩并[3,2- b:2',3'- d ]硅烷基(DTSi)的三个2,2-二氰基乙烯基(DCV)端基封端的A-π-D-π-A型寡噻吩(DCV-OTs)作为中央供体部分的环戊基[1,2- b:3,4- b ']二噻吩(DTCP)或二噻吩并[3,2- b:2',3'- d ]吡咯(DTPy)单元为中心供体,单噻吩合成了π共轭桥。对这些化合物的吸收光谱,循环伏安法进行了表征。结果表明,所有这些化合物在500–680 nm范围内都有较强的吸收带,其LUMO能级约为-3.80 eV,略高于[6,6]苯基-C 61-丁酸甲酯(PC 61BM,E LUMO = -4.01eV),但低于聚(3-己基噻吩)(P3HT,E LUMO = -2.91eV)。制备并测试了以P3HT为电子供体和上述低聚噻吩为电子受体的固溶体异质结“全噻吩”太阳能电池。DTSi芯复合材料DTSi(THDCV)2的最高功率转换效率(PCE)为1