一种应用于钙钛矿太阳能电池的D-A-D型传输材料的合成及性能研究

摘要提高钙钛矿太阳能电池的效率和稳定性是发展过程中的巨大挑战，通过引入添加剂、钝化剂、保护层等方法，在钙钛矿层和空穴传输层之间引入界面修饰层对界面传输进行改善，抑制电子和空穴复合，是提高钙钛矿太阳能电池效率和稳定性的有效手段。报道了一种具有较高载流子迁移率的顺式D-A-D（Donor-Acceptor-Donor）型三苯胺偶氮化合物（TPA）₂Ab，将其用作钙钛矿层和Spiro-OMeTAD层之间的传输层，记为电荷分离层。电荷分离层的引入有效增加了空穴传输，抑制载流子复合，钝化了钙钛矿层表面陷阱；并通过掺杂碘化氢进一步优化了钙钛矿层表面形貌，降低了传输阻值。同没有电荷分离层的参比电池对比，发现有电荷分离层修饰的钙钛矿太阳能电池效率由14.24%提升至16.14%，提升近14%。同时，电荷分离层的引入可以减弱水氧对钙钛矿层的破坏，因此电池稳定性也得到显著提高，电池的效率依然保持在85.69%。

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	耿瑞琳
	冯文慧
	Thomas T. Testoff
	刘东志
	汪天洋
	李巍
	王丽昌
	周雪琴

关键词：三苯胺偶氮合成钙钛矿太阳能电池电荷分离层

Abstract： The efficiency and stability of perovskite solar cells are huge challenges in the developing process. Therefore, it is an effective way to improve the efficiency and stability of perovskite solar cells by introducing additives, passivators, protective layers, etc. between the perovskite layer and the hole transport layer to improve the interface transport and suppress the combination of electrons and holes. In this study, a cis D-A-D type (Donor-Acceptor-Donor) triphenylamine azo compound (TPA)₂Ab with higher carrier mobility was reported, which is used as a transport layer between the perovskite layer and the Spiro-OMeTAD layer, labeled as charge separation layer (CSL). The introduction of the charge separation layer effectively increases the transport of holes, inhibits carrier recombination, and passivates the traps on the surface of the perovskite; hydrogen iodide was doped into (TPA)₂Ab to improve the perovskite layer surface topography and reduce transmission resistance. Compared with the reference cell without charge separation layer, it is found that the efficiency of the perovskite solar cell modified with the charge separation layer has an increase of nearly 14%, increased from 14.24% to 16.14%. At the same time, the charge separation layer can weaken the decomposition of the perovskite layer by water and oxygen, so the stability of the cell is also significantly improved, and the retention rate of the cell with the best efficiency reaches 85.69% after 10 days.

Keywords： triphenylamine； Azo； synthesis； perovskite device； interface modification

Received 2020-07-29;

Fund:国家自然科学基金（21776207；21506151和21576195）。

Corresponding Authors: 周雪琴,E-mail:zhouxueqin@tju.edu.cn。 Email: zhouxueqin@tju.edu.cn

About author: 耿瑞琳(1994-),女,硕士研究生,现从事太阳能电池方面的研究。

引用本文:

耿瑞琳, 冯文慧, Thomas T. Testoff, 刘东志, 汪天洋, 李巍, 王丽昌, 周雪琴.一种应用于钙钛矿太阳能电池的D-A-D型传输材料的合成及性能研究[J]. 化学工业与工程, 2021,38(4): 13-24

Geng Ruilin, Feng Wenhui, Thomas T. Testoff, Liu Dongzhi, Wang Tianyang, Li Wei, Wang Lichang, Zhou Xueqin.Synthesis and Performance Research of D-A-D Type Transport Materials Applied in Perovskite Solar Cells[J]. Chemcial Industry and Engineering, 2021,38(4): 13-24

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