A Solution-Processable Molecule using Thieno[3,2-b]thiophene as Building Block for Efficient Organic Solar Cells.
A Solution-Processable Molecule using Thieno[3,2-b]thiophene as Building Block for Efficient Organic Solar Cells.
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使用噻吩并[3,2-b]噻吩作为高效有机太阳能电池构建模块的可溶液加工分子。
DOI：
10.1002/asia.201500476
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Yang Renqiang
中科院分区：
文献类型：
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作者：
Wei Huan;Chen Weichao;Han Liangliang;Wang Ting;Bao Xichang;Li Xiaoyun;Liu Jie;Zhou Yuanhang;Yang Renqiang
设计并合成了一种溶液处理的受体-π-供体-π-受体（A-π-D-π-A）型小分子DCATT，作为有机太阳能电池的供体材料。以噻吩为侧链的稠环噻吩并[3，2-B]噻吩（TT）为π桥，以4，8-双噻吩基取代的苯并二噻吩（BDT）和氰基乙酸2-乙基己酯为中心结构单元和端基。在小分子中引入稠环增加了主链的共轭长度，并形成π-π堆积，形成大的重叠面积，有利于高的载流子输运。基于DCATT和富勒烯受体共混物的小分子有机太阳能电池在AM 1.5G，100 mW cm−2的照射下表现出高达5.20%的功率转换效率。
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.