Achieving long-term stable perovskite solar cells via ion neutralization

被引：278

作者：

Back, Hyungcheol ^{[1
,2
]}

Kim, Geunjin ^{[1
,2
]}

Kim, Junghwan ^{[1
,2
]}

Kong, Jaemin ^{[1
,2
]}

Kim, Tae Kyun ^{[1
,2
]}

Kang, Hongkyu ^{[1
,2
]}

Kim, Heejoo ^{[1
,2
]}

Lee, Jinho ^{[3
]}

Lee, Seongyu ^{[3
]}

Lee, Kwanghee ^{[1
,2
,3
]}

机构：

[1] Gwangju Inst Sci & Technol, Heeger Ctr Adv Mat, Gwangju 61005, South Korea

[2] Gwangju Inst Sci & Technol, Res Inst Solar & Sustainable Energies, Gwangju 61005, South Korea

[3] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Gwangju 61005, South Korea

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2016年 / 9卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

METHYLAMMONIUM LEAD IODIDE; HYSTERESIS; EFFICIENT; PHOTOCURRENT; TRIHALIDE;

D O I：

10.1039/c6ee00612d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Despite recent reports of high power conversion efficiency (PCE) values of over 20%, the instability of perovskite solar cells (PSCs) has been considered the most serious obstacle toward their commercialization. By rigorously exploring the self-degradation process of planar-type PSCs using typical metal electrodes (Ag or Al), we found that the corrosion of the metal electrodes by inherent ionic defects in the perovskite layers is a major origin of intrinsic device degradation even under inert conditions. In this work, we have developed a new concept of a chemical inhibition in PSCs using amine-mediated metal oxide systems and succeeded in chemically neutralizing mobile ionic defects through mutual ionic interaction. As a consequence, we realized planar-type PSCs with long-term stability that maintain nearly 80% of their initial PCEs even after 1 year (9000 h) of storage under nitrogen and 80% of their initial PCEs after 200 h in ambient conditions without any encapsulation.

引用

页码：1258 / 1263

页数：6

共 33 条

[1] High efficiency solid state dye sensitized solar cells with graphene-polyethylene oxide composite electrolytes [J].