Optical characterization of voltage-accelerated degradation in CH_3NH_3PbI_3 perovskite solar cells | Zendy

Taketo Handa | Zendy; David M. Tex | Zendy; Ai Shimazaki | Zendy; Tomoko Aharen | Zendy; Atsushi Wakamiya | Zendy; Yoshihiko Kanemitsu | Zendy

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Optical characterization of voltage-accelerated degradation in CH_3NH_3PbI_3 perovskite solar cells

Author(s) -

Taketo Handa,

David M. Tex,

Ai Shimazaki,

Tomoko Aharen,

Atsushi Wakamiya,

Yoshihiko Kanemitsu

Publication year - 2016

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.24.00a917

Subject(s) - photoluminescence , electroluminescence , perovskite (structure) , materials science , degradation (telecommunications) , optoelectronics , biasing , optics , voltage , layer (electronics) , chemistry , nanotechnology , electronic engineering , physics , crystallography , quantum mechanics , engineering

We investigate the performance degradation mechanism of CH 3 NH 3 PbI 3 perovskite solar cells under bias voltage in air and nitrogen atmospheres using photoluminescence and electroluminescence techniques. When applying forward bias, the power conversion efficiency of the solar cells decreased significantly in air, but showed no degradation in nitrogen atmosphere. Time-resolved photoluminescence measurements on these devices revealed that the application of forward bias in air accelerates the generation of non-radiative recombination centers in the perovskite layer buried in the device. We found a negative correlation between the electroluminescence intensity and the injected current intensity in air. The irreversible change of the perovskite grain surface in air initiates the degradation of the perovskite solar cells.

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