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  

Synthesis and Performance Research of D-A-D Type Transport Materials Applied in Perovskite Solar Cells

作　　者：耿瑞琳 冯文慧 Thomas TTestoff 刘东志[1,2] 汪天洋 李巍 王丽昌[1,2,3] 周雪琴 Geng Ruilin;Feng Wenhui;Thomas TTestoff;Liu Dongzhi;Wang Tianyang;Li Wei;Wang Lichang;Zhou Xueqin(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Collaborative Innovation Center of Chemical Science and Engineering,Tianjin 300372,China;Department of Chemistry and Biochemistry and the Materials Technology Center,Southern Illinois University,Carbondale,IL 62901,United States)

机构地区：[1]天津大学化工学院,天津300350 [2]天津化学化工协同创新中心,天津300072 [3]美国南伊利诺伊大学卡本代尔分校化学与生化系材料技术中心,伊利诺伊,IL 62901

出　　处：《化学工业与工程》2021年第4期13-24,共12页Chemical Industry and Engineering

基　　金：国家自然科学基金(21776207,21506151和21576195)

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%。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.

关 键 词：三苯胺 偶氮 合成 钙钛矿太阳能电池 电荷分离层 

分 类 号：O621[理学—有机化学] O69[理学—化学]