摘要
选择以氰基乙酸作为电子受体,以苯环、噻吩以及联噻吩作为共轭桥链,分别合成了以1个三苯胺作为电子供体的参比染料ST-1和以2个三苯胺作为电子供体的染料DT-1与DT-2。并用核磁共振、傅里叶红外光谱以及质谱对目标产物的结构进行了表征。分别考察了增加1个三苯胺供体和延长共轭桥链对染料敏化剂的光物理性能、电化学性能和光伏性能的影响。结果表明,当增加1个额外的三苯胺供体后,染料的开路电压(Voc)得到明显提高,其中染料DT-1在可见光区的吸收很弱,短路电流密度(Jsc)变小,相比之下,在共轭桥链中以联噻吩替换单噻吩后,染料DT-2在可见光区的吸收明显增强,Jsc增大,表现出最高的光电转化效率3.91%。
Three organic dyes including monotriphenylamine-doner dye ST- 1 and bitriphenylaminedoner dyes DT- 1,DT- 2 were synthesized with cyanoacrylic acid moieties as electron acceptors,and benzene or thiophene derivatives as conjugated linker. The structures of the molecules were characterized by means of NMR,FTIR and MS. The effects of increasing the amount of donors and prolonging its conjugated linkers on the photo-physical,electrochemical and photovoltaic properties of the dyes were studied. The results indicate that DT- 1 and DT- 2 can effectively enhance open-circuit voltage of DSSCs due to the increase in the amount of triphenylamine donors. But the absorption intensity of DT- 1 is weaker in visible area,which leads to a decreasing short-circuit current. However,when thiophene is replaced by bithiophene to construct the conjugated linker,the absorption intensity of DT- 2 becomes stronger in visible section,thus the short-circuit current has been improved remarkably,and it exhibits a highest power conversion efficiency of 3. 91%.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2015年第10期1167-1174,1189,共9页
Fine Chemicals
基金
陕西省自然科学基础研究计划项目(2014JM7270)
西安市技术转移促进工程〔CXY1430(2)〕~~
关键词
染料敏化太阳能电池
三苯胺
双供体染料
共轭桥链
光电转化效率
特种染料与颜料
dye-sensitized solar cells
triphenylamine
double-donor dye
conjugated linker
power conversion efficiency
special dyes and pigments
