New efficient organic dyes employing indeno[1,2-b]indole as the donor moiety for dye-sensitized solar cells

New efficient organic dyes employing indeno[1,2-b]indole as the donor moiety for dye-sensitized solar cells
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采用茚并[1,2-b]吲哚作为染料敏化太阳能电池供体部分的新型高效有机染料

DOI:
10.1016/j.jpowsour.2016.09.138
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发表时间:
2016-11
影响因子:
9.2
通讯作者:
Hou Linxi
Hou Linxi
中科院分区:
工程技术2区
文献类型:
--
作者:
Qian Xing;Yan Rucai;Xu Chong;Shao Li;Li Hongmei;Hou Linxi

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合成了一种基于吲哚[1,2-b]的新型有机染料,并首次应用于染料敏化太阳能电池(DSSCs)。这四种染料qx11 - 14被构造成由一个吲哚[1,2-b]给体和一个氰丙烯酸受体/锚定基组成的D -π-A型结构。利用不同的π桥(噻吩和呋喃)和不同的烷基(乙基和己基)来调节光电性能。系统地研究了它们的光学、电化学和光伏性质以及密度泛函理论计算,表明这四种染料都能作为光敏剂。四种染料均表现出良好的DSSC性能,具有呋喃π桥和一对乙基的染料qx12在1.5G AM光照下的最高功率转换效率为7.64%,ajsc为15.8 mA cm−2,avocv为763 mV,达到了商用n719染料(8.07%)的95%。结果表明,吲哚[1,2-b]吲哚是一种很有前途的电子给体,可用于构建高效的DSSCs有机染料。
A new series of organic dyes based on indeno[1,2-b]indole have been synthesized and applied in dye-sensitized solar cells (DSSCs) for the first time. These four dyesQX11–14are constructed to a D–π–A type structure consisting of an indeno[1,2-b]indole donor and a cyanoacrylic acid acceptor/anchoring group. Different π-bridges (thiophene and furan) and different alkyl groups (ethyl and hexyl) are involved to tune the photoelectric properties. Their optical, electrochemical, and photovoltaic properties, as well as the density functional theory calculations have been systematically investigated, indicating these four dyes are all capable as photosensitizers. The four dyes all show good DSSC performances and a highest power conversion efficiency up to 7.64% with aJscof 15.8 mA cm−2and aVocof 763 mV has been achieved by the dyeQX12with a furan π-bridge and a pair of ethyl groups, which reaches 95% of the commercialN719dye (8.07%) under AM 1.5G illumination. This result reveals indeno[1,2-b]indole is a promising electron donor to construct efficient organic dyes for DSSCs.
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