首页> 外文期刊>RSC Advances >Novel solution-processible small molecules based on benzo[1,2-b:3,4-b ':5,6-b '']trithiophene for effective organic photovoltaics with high open-circuit voltage
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Novel solution-processible small molecules based on benzo[1,2-b:3,4-b ':5,6-b '']trithiophene for effective organic photovoltaics with high open-circuit voltage

机译:基于苯并的新型溶液 - 加工的小分子[1,2-B:3,4-B':5,6-B'']用于具有高开路电压的有效有机光伏的三曲蛋白

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摘要

Two novel A-D-A small molecules D1 and D2, containing benzo[1,2-b:3,4-b':5,6-b ''] trithiophene as the central electron-donating unit, 3-ethylrhodanine as end-capped electron-withdrawing units, and two thiophenes or three thiophenes as conjugated pi-bridges, were designed and synthesized. The effects of the conjugated pi-bridges on the photophysical, electrochemical and photovoltaic properties as well as the aggregation structure, were fully investigated. Compared with D2, D1 shows stronger packing capability, deeper HOMO energy levels, higher hole mobility, and more appropriate microphase separation with the fullerene derivative [6,6]-phenyl-C-61-butyric acid methyl ester (PC61BM), which lead to better photovoltaic performance with higher short-circuit current density (J(sc)) and open-circuit voltages (V-oc). Bulk-heterojunction (BHJ) organic photovoltaic (OPV) devices were fabricated using a blend of the as-synthesized small molecules and PC61BM in different solvents. The D1-CF device prepared from chloroform solution with a weight ratio of 1 : 0.5 exhibited a power conversion efficiency (PCE) of 2.10% and an amazingly high V-oc of 1.10 V under AM 1.5G (100 mW cm(-2)) illumination.
机译:两种新型ADA小分子D1和D2,含有苯并[1,2-B:3,4-B':5,6-B '']三噻吩为中心的给电子单元,3- ethylrhodanine作为封端的电子吸电子单元,和两个噻吩或噻吩3作为共轭的π桥梁,设计并合成。在光物理,电化学和光伏特性以及聚集结构的共轭的π桥的影响,进行了充分的调查。与D2,D1示出了更强的包装能力,更深的HOMO能级,更高的空穴迁移率,并且与富勒烯衍生物[6,6] - 苯基C-61 - 丁酸甲酯(PC 61 BM),其铅更适当的微相分离相比以更高的短路电流密度(j(SC))和开路电压(V-α)较好的光电性能。体异质结(BHJ)有机光伏(OPV)器件,使用的共混物制造的合成后原样的在不同溶剂中的小分子和PC61BM。的D1-CF设备从氯仿溶液制备以1:1的重量比:0.5表现出2.10%的功率转换效率(PCE)和1.10的V在AM1.5G一个令人惊讶的高V-OC(100毫瓦厘米(-2) )照明。

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  • 来源
    《RSC Advances》 |2015年第19期|共7页
  • 作者单位

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Guilin Univ Elect Technol Dept Mat Sci &

    Engn Guilin 541004 Peoples R China;

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Coll Chem Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Key Lab Adv Funct Polymer Mat Coll Hunan Prov Xiangtan 411105 Peoples R China;

    Xiangtan Univ Key Lab Adv Funct Polymer Mat Coll Hunan Prov Xiangtan 411105 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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