Synthesis and photovoltaic properties of organic small molecules containing triphenylamine and benzothiadiazole moieties with different terminal groups

Synthesis and photovoltaic properties of organic small molecules containing triphenylamine and benzothiadiazole moieties with different terminal groups
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不同端基三苯胺和苯并噻二唑有机小分子的合成及光伏性能

DOI:
10.1016/j.dyepig.2013.03.011
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发表时间:
2013-09
期刊:
影响因子:
4.5
通讯作者:
Tan, Songting
Tan, Songting
中科院分区:
材料科学2区
文献类型:
--
作者:
Liu, Xunshan;Li, Haohao;Shen, Tianpei;Tan, Songting

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设计并合成了三种含三苯胺(TPA)和4,7-双(噻吩-2-基)苯并[1,2,5]噻二唑(DTBT)的新型有机小分子(TPA-DTBT,TPA-DTBT-TH和TPA-DTBT-CAO)。研究了它们的热学、物理、电化学和光伏性能。氰基乙酸2-乙基己酯和2-十四烷基噻吩作为端基的引入延长了分子的π共轭长度,拓宽了吸收光谱。三个小分子在普通有机溶剂中具有良好的溶解性,良好的成膜能力和热稳定性。基于小分子TPA-DTBT和PC61 BM的共混物的本体异质结(BHJ)太阳能电池显示出1.85%的功率转换效率(η)。
Three new organic small molecules (TPA-DTBT, TPA-DTBT-TH and TPA-DTBT-CAO) containing triphenylamine (TPA) and 4,7-bis(thiophen-2-yl)benzo[1,2,5]thiadiazole (DTBT) moieties with different terminal groups were designed and synthesized. Their thermal, photophysical, electrochemical and photovoltaic properties were investigated. The introduction of 2-ethylhexyl cyanoacetate and 2-tetradecyl thiophene as terminal groups extended molecular π-conjugation length and broadened the absorption spectra. Three small molecules exhibit good solubility in common organic solvents, good film-forming ability, and thermal stability. Bulk heterojunction (BHJ) solar cells based on the blend of small molecule TPA-DTBT and PC61BM showed a power conversion efficiency (η) of 1.85%.
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