| 祖凯,石华强,王世彬.化学通报,2022,85(11):1357-1362. |
| 一种非线性结构空穴传输材料的合成及其光伏性能研究 |
| Synthesis of Nonlinear Structural Hole Transport material and Study of Photovoltaic Performance |
| 投稿时间：2022-03-15 修订日期：2022-04-14 |
| DOI： |
| 中文关键词: 钙钛矿太阳能电池 空穴传输材料 光电转换效率 三苯胺 |
| 英文关键词:perovskite solar cells, hole transport materials, power conversion efficiency, triphenylamine |
| 基金项目: |
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| 中文摘要: |
| 以三苯胺为电子给体单元，4-叔丁基-甲氧基苯环为母核，设计合成了1种非线性“Y型”结构的空穴传输材料（2TPA-ph-tbyl）。光电化学测试结果表明该材料与钙钛矿材料能级匹配。单晶X射线衍射结果表明，该分子通过端位基团三苯胺形成分子间C-H/π相互作用。这种较强的侧链堆积作用使2TPA-ph-tbyl获得了3.13× 10-5 cm2 V-1 s-1的空穴迁移率，是商用空穴传输材料PEDOT：PSS的1.5倍。将其制备成倒置结构钙钛矿太阳能电池，开路电压达到1000 mV、短路电流密度为21.53 mA?cm-2，填充因子为0.71，其光电转换效率达到15.2%，高于PEDOT：PSS（13.7%）。稳态光致发光和阻抗测试表明，2TPA-ph-tbyl可以促进钙钛矿-空穴传输材料界面电荷传输，降低界面电荷复合，从而提高电池的开路电压和短路电流。上述结果表明，具有非线性结构的空穴传输材料可以通过增强分子间的侧链堆积效应，提高材料的空穴迁移率，进而提高电池的光电转换效率。 |
| 英文摘要: |
| A new kind of hole transport material (2TPA-ph-tbyl) was designed and synthesized with triphenylamine as electron donor and 1-(tert-butyl)-4-methoxybenzene unit as the central core. Photochemical tests showed that the energy levels of this material match well with the perovskite. Single-crystal X-ray diffraction indicated that some intermolecular C-H/π interaction were formed through the terminal triphenylamine group. This strong side-chain stacking allowed 2TPA-ph-tbyl to obtain a hole mobility of 3.13?10-5 cm2 V-1s-1, which was 1.5 times that of the commercial hole transport material PEDOT: PSS. The 2TPA-ph-tbyl was used to fabricate the inverted perovskite solar cells, achieving a power conversion efficiency of 15.2% with an open circuit voltage of 1000 mV, a short circuit current density of 21.53 mA?cm-2, and a filling factor of 0.71. The efficiency of device with 2TPA-ph-tbyl was higher than that of PEDOT: PSS (13.7%). Steady-state photoluminescence and impedance tests showed that 2TPA-ph-tbyl can promote the charge transfer and reduce the charge recombination at the perovskite-hole transport material interface, thus increasing the open-circuit voltage and short-circuit current of solar cells. The above results indicate that the hole mobility of hole transport material with a nonlinear structure can be improved by enhancing the effect of intermolecular side chains packing, further improve the photovoltaic performance of device. |
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