Multilayer Cascade Charge Transport Layer for High-Performance Inverted Mesoscopic All-Inorganic and Hybrid Wide-Bandgap Perovskite Solar Cells

被引：31

作者：

Chen, Yu ^{[1
,2
]}

Tang, Weijian ^{[2
]}

Wu, Yihui ^{[2
]}

Yuan, Ruihan ^{[2
]}

Yang, Jianchao ^{[2
]}

Shan, Wenjuan ^{[3
]}

Zhang, Shengli ^{[1
]}

Zhang, Wen-Hua ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] China Acad Engn Phys, Inst Chem Mat, Sichuan Res Ctr New Mat, 596 Yinhe Rd, Chengdu 610200, Peoples R China

[3] Liaoning Normal Univ, Coll Chem & Chem Engn, Inst Chem Functionalized Mat, Dalian 116029, Peoples R China

来源：

SOLAR RRL | 2020年 / 4卷 / 10期

基金：

中国国家自然科学基金;

关键词：

charge-carrier transfer; charge transport layers; crystallization tailoring; energy alignment; perovskite solar cells; EFFICIENT; HYSTERESIS; CATION; TIN; CSPBI2BR;

D O I：

10.1002/solr.202000344

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

It is imperative to improve the quality of light absorber and reduce the charge-carrier recombination for efficient perovskite solar cells (PSCs). Herein, a synergistic regulation strategy that combines the tailoring of crystallinity and construction of multilayer cascade charge transport layers (CTLs) for inverted CsPbI2Br solar cells is presented. The film quality of CsPbI2Br is well tuned via F(-)doping. In addition, gradient energy alignment between perovskite and CTLs, i.e., NiOx/Zn:CuGaO2/perovskite and perovskite/TiO2/PC61BM/ZnO, favors the charge transfer and depresses carrier recombination. Noticeably, the TiO(2)interlayer with deep valence band maximum effectively blocks the hole back-transfer from perovskite to PC61BM. These unique characteristics of the novel structured CsPbI2Br device give a champion power conversion efficiency (PCE) of 15.10% along with good thermal and operational stability. Moreover, the graded CTLs can be expanded to methylammonium-free hybrid perovskite device (E-g = approximate to 1.76 eV) by delivering a PCE of 18.12%, showing great promise in tandem solar cells for use as top cell.

引用

页数：10

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