一种以噻吩并[3,2-b]噻吩为结构单元的可溶液加工分子用于高效有机太阳能电池。
A Solution-Processable Molecule using Thieno[3,2-b]thiophene as Building Block for Efficient Organic Solar Cells.
作者信息
Wei Huan, Chen Weichao, Han Liangliang, Wang Ting, Bao Xichang, Li Xiaoyun, Liu Jie, Zhou Yuanhang, Yang Renqiang
机构信息
CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
出版信息
Chem Asian J. 2015 Aug;10(8):1791-8. doi: 10.1002/asia.201500476. Epub 2015 Jul 14.
A solution-processed acceptor-π-donor-π-acceptor (A-π-D-π-A) type small molecule, namely DCATT, has been designed and synthesized for the application as donor material in organic solar cells. The fused aromatic unit thieno[3,2-b]thiophene (TT) flanked with thiophene is applied as π bridge, while 4,8-bisthienyl substituted benzodithiophene (BDT) and 2-ethylhexyl cyanoacetate are chosen as the central building block and end group, respectively. Introduction of fused ring to the small molecule enhances the conjugation length of the main chain, and gives a strong tendency to form π-π stacking with a large overlapping area which favors to high charge carrier transport. Small-molecule organic solar cells based on blends of DCATT and fullerene acceptor exhibit power conversion efficiencies as high as 5.20 % under the illumination of AM 1.5G, 100 mW cm(-2) .
已设计并合成了一种溶液法制备的受体-π-供体-π-受体（A-π-D-π-A）型小分子，即DCATT，用作有机太阳能电池中的供体材料。噻吩并[3,2-b]噻吩（TT）两侧带有噻吩的稠合芳环单元用作π桥，而4,8-双噻吩基取代的苯并二噻吩（BDT）和2-乙基己基氰基乙酸酯分别被选作中心结构单元和端基。向小分子中引入稠环可增强主链的共轭长度，并强烈倾向于形成具有大重叠面积的π-π堆积，这有利于高电荷载流子传输。基于DCATT与富勒烯受体混合物的小分子有机太阳能电池在AM 1.5G、100 mW cm(-2)光照下的功率转换效率高达5.20%。
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