High-Performance Lead-Free Solar Cells Based on Tin-Halide Perovskite Thin Films Functionalized by a Divalent Organic

被引：99

作者：

Chen, Min ^{[1
]}

Dong, Qingshun ^{[1
,2
]}

Eickemeyer, Felix T. ^{[3
]}

Liu, Yuhang ^{[3
]}

Dai, Zhenghong ^{[1
]}

Carl, Alexander D. ^{[4
]}

Bahrami, Behzad ^{[5
]}

Chowdhury, Ashraful H. ^{[5
]}

Grimm, Ronald L. ^{[4
]}

Shi, Yantao ^{[2
]}

Qiao, Qiquan ^{[5
]}

Zakeeruddin, Shaik Mohammed ^{[3
]}

Gratzel, Michael ^{[3
]}

Padture, Nitin P. ^{[1
]}

机构：

[1] Brown Univ, Sch Engn, Providence, RI 02912 USA

[2] Dalian Univ Technol, Dept Chem, State Key Lab Fine Chem, Sch Chem Engn, Dalian 116024, Peoples R China

[3] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1052 Lausanne, Switzerland

[4] Worcester Polytech Inst, Dept Chem & Biochem, Worcester, MA 01609 USA

[5] South Dakota State Univ, Dept Elect Engn & Comp Sci, Brookings, SD 57007 USA

来源：

ACS ENERGY LETTERS | 2020年 / 5卷 / 07期

基金：

欧盟地平线“2020”; 瑞士国家科学基金会; 中国博士后科学基金; 中国国家自然科学基金; 美国国家科学基金会;

关键词：

PHOTOLUMINESCENCE; EFFICIENCY;

D O I：

10.1021/acsenergylett.0c00888

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tin-based halide perovskite solar cells (PSCs) hold the most promise among lead-free PSCs, but they are plagued with inadequate environmental stability and power-conversion efficiency (PCE). Here we demonstrate that the optimum incorporation of a bulky divalent organic cation, 4-(aminomethyl)- piperidinium (4AMP), in FASnI(3) thin films improves stability, optoelectronic properties, and PSC performance. The optimized PSC yields a maximum PCE of 10.9% and good 500-h operational stability under continuous illumination. This is attributed to the unique thin-film structure, where the strong ionic bonding afforded by divalent 4AMP may provide near-full-coverage functionalization (encapsulation) of FASnI(3) grain surfaces and grain boundaries, retarding O-2/H2O ingression and mitigating Sn-defects for reduced photocarrier nonradiative recombination.

引用

页码：2223 / 2230

页数：8

共 36 条

[1] Perovskite Solar Cells Go Lead Free [J].