Trapped charge-driven degradation of perovskite solar cells

被引：524

作者：

Ahn, Namyoung ^{[1
,2
]}

Kwak, Kwisung ^{[1
,2
]}

Jang, Min Seok ^{[3
]}

Yoon, Heetae ^{[1
,2
]}

Lee, Byung Yang ^{[4
]}

Lee, Jong-Kwon ^{[1
]}

Pikhitsa, Peter V. ^{[1
]}

Byun, Junseop ^{[1
,2
]}

Choi, Mansoo ^{[1
,2
]}

机构：

[1] Seoul Natl Univ, Global Frontier Ctr Multiscale Energy Syst, Seoul 08826, South Korea

[2] Seoul Natl Univ, Dept Mech & Aerosp Engn, Seoul 08826, South Korea

[3] Korea Adv Inst Sci & Technol, Sch Elect Engn, Daejeon 34141, South Korea

[4] Korea Univ, Dept Mech Engn, Seoul 02841, South Korea

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

新加坡国家研究基金会;

关键词：

CH3NH3PBI3; PEROVSKITE; HIGH-PERFORMANCE; V HYSTERESIS; EFFICIENCY; STATE; LAYER; STABILITY; EXPOSURE; FILMS; OXIDE;

D O I：

10.1038/ncomms13422

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Perovskite solar cells have shown unprecedent performance increase up to 22% efficiency. However, their photovoltaic performance has shown fast deterioration under light illumination in the presence of humid air even with encapulation. The stability of perovskite materials has been unsolved and its mechanism has been elusive. Here we uncover a mechanism for irreversible degradation of perovskite materials in which trapped charges, regardless of the polarity, play a decisive role. An experimental setup using different polarity ions revealed that the moisture-induced irreversible dissociation of perovskite materials is triggered by charges trapped along grain boundaries. We also identified the synergetic effect of oxygen on the process of moisture-induced degradation. The deprotonation of organic cations by trapped charge-induced local electric field would be attributed to the initiation of irreversible decomposition.

引用

页数：9

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