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Simple and low-cost thiophene and benzene-conjugated triaryamines as hole-transporting materials for perovskite solar cells

机译：简单且低成本的噻吩和苯共轭三芳胺作为钙钛矿太阳能电池的空穴传输材料

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摘要

Two novel electron-rich linear small-molecules, containing benzene and thiophene as the cores with arylamine side groups, named HTM1 and HTM2, respectively, were synthesized via short, easy and efficient synthetic routes. The influence of the pi-linkers of the two materials on photophysical, electrochemical, and thermal properties, and hole mobility and photovoltaic performance was investigated. The compound with thiophene as p-linker (HTM2) shows better solubility and higher hole-transporting mobility than the compound with benzene as p-linker (HTM1). When these two materials were incorporated into perovskite solar cells as hole transporting materials (HTMs), short circuit photocurrent densities (J(sc)s) of 15.83 mA cm(-2) and 21.1 mA cm(-2), open circuit voltages (V(oc)s) of 0.79 V and 1.09 V, and fill factors (FFs) of 0.46 and 0.62, were obtained. These factors contributed to average overall power conversion efficiencies (PCEs) of 6.4% and 13.9% with the best PCEs of 7.5% and 14.7%, respectively. The performance of HTM2 is comparable to the PCE obtained using the current state-of-the- art HTM of 2,2 ',7,7 '-tetrakis(N, N '-di-p-methoxyphenylamine)-9,9 '-spirobifluorene (spiro-OMeTAD) with the best PCE of 17.4% using a similar device preparation method and measurement conditions. These results showed that selecting a suitable pi-linker is important for the performance of HTMs. And the simple HTM2 material is a promising HTM with the potential to replace the expensive spiro-OMeTAD due to its comparable performance with a much simpler synthesis route and much reduced cost (10 times less than that of spiro-OMeTAD). This study demonstrates that a compound with a suitable pi-linker could be a low-cost and high performance HTM to replace spiro-OMeTAD.
机译：通过短，简单高效的合成路线合成了两种新的含有苯和噻吩作为芳族侧基团的核心，含有苯胺侧基的核心的新型线性小分子，称为HTM1和HTM2。研究了两种材料对光学性，电化学和热性能的影响，以及空穴迁移率和光伏性能。与噻吩（HTM2）为p键的化合物显示出比用苯作为p键合（HTM1）的化合物更好的溶解度和更高的空穴传输迁移率。当这两种材料掺入钙钛矿太阳能电池中作为空穴传输材料（HTMS）时，短路光电流密度（J（SC））为15.83 mA cm（-2）和21.1 mA cm（-2），开路电压（获得0.79 V和1.09 V，填充因子（FF）为0.46和0.62的v（OC）S）。这些因素有助于平均总体电力转换效率（PCE）为6.4％和13.9％，最佳PCE分别为7.5％和14.7％。 HTM2的性能与使用2,2'，7,7'-Tetrakis（N，N'-Di-P-甲氧基甲氧基胺）-9,9'的当前最新的HTM获得的PCE相当 - 使用类似的器件制备方法和测量条件，具有最佳PCE的磷脂（Spiro-Ometad），具有17.4％。这些结果表明，选择合适的Pi-Linker对于HTM的性能是重要的。并且简单的HTM2材料是一个有前途的HTM，可能由于其具有更简单的合成路线和降低成本（比Spiro-Ometad的10倍）更换昂贵的螺旋-Moledad。该研究表明，具有合适的Pi-Linker的化合物可以是低成本和高性能的HTM，以替代螺欧比达。

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  • 来源
    《RSC Advances》 |2017年第72期|共6页
  • 作者

    Wu Jianchang; Liu Chang; Deng Xiang; Zhang Luozheng; Hu Manman; Tang Jun; Tan Wenchang; Tian Yanqing; Xu Baomin;

  • 作者单位

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Guangdong Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

    Southern Univ Sci &

    Technol Dept Mat Sci &

    Engn 1088 Xueyuan Rd Shenzhen 518055 Guangdong Peoples R China;

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