Thermally activated, light-induced electron-spin-resonance spin density reflected by photocurrents in a perovskite solar cell

被引：9

作者：

Jeon, N. J. ^{[1
]}

Yang, T. -Y. ^{[1
]}

Park, H. H. ^{[1
]}

Seo, J. ^{[1
]}

Nam, D. Y. ^{[2
]}

Jeong, D. ^{[2
]}

Hong, S. ^{[2
]}

Kim, S. H. ^{[2
]}

Cho, J. M. ^{[3
]}

Jang, J. J. ^{[4
]}

Lee, J. -K. ^{[4
]}

机构：

[1] Korea Res Inst Chem Technol, Div Adv Mat, Daejeon 305600, South Korea

[2] Korea Basic Sci Inst, Western Seoul Ctr, Seoul 03759, South Korea

[3] TOPnC Co Ltd, Res Inst, Daejeon 34158, South Korea

[4] Chonbuk Natl Univ, Dept Phys & RIPC, Jeonju 54896, South Korea

来源：

APPLIED PHYSICS LETTERS | 2019年 / 114卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

TEMPERATURE; EFFICIENCY; INTERFACE; STATE; GAP;

D O I：

10.1063/1.5053830

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Light-induced electron-spin-resonance (LESR) spin density in a perovskite solar cell (PSC) is ascribed to photo-induced charges accumulated at the interface of the perovskite and the hole transport layer (HTL). The LESR spin density was observed to he decreased as the temperature was lowered from room temperature to 170 K in a PSC; below similar to 170 K, no LESR was found. Meanwhile, the photocurrent showed only an similar to 25% decrease between room temperature and 170 K. The comparison of LESR in temperature-dependence with transient or steady photocurrents suggested that the decrease in photocurrent at the low temperatures stems mainly from trapping of delocalized holes at the interface of perovskite and HTL. Published. under license by AIP Publishing.

引用

页数：5

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