Long-Lasting Nanophosphors Applied to UV-Resistant and Energy Storage Perovskite Solar Cells

被引：127

作者：

Chen, Cong ^{[1
]}

Li, Hao ^{[1
]}

Jin, Junjie ^{[1
]}

Chen, Xu ^{[1
]}

Cheng, Yu ^{[1
]}

Zheng, Yan ^{[2
]}

Liu, Dali ^{[1
]}

Xu, Lin ^{[1
]}

Song, Hongwei ^{[1
]}

Dai, Qilin ^{[3
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

[2] Shanghai Keyan Phosphor Technol Co Ltd, Shanghai 201619, Peoples R China

[3] Jackson State Univ, Dept Phys Atmospher Sci & Geosci, Jackson, MS 39217 USA

来源：

ADVANCED ENERGY MATERIALS | 2017年 / 7卷 / 20期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

downshifting; perovskite solar cells; solar energy storage; SrAl2O4: Eu2+; Dy3+; UV stability; HIGH-EFFICIENCY; HALIDE PEROVSKITES; QUANTUM DOTS; THIN-FILMS; STABILITY; DEGRADATION; PERFORMANCE; PHOSPHORESCENCE; ENHANCEMENT; PASSIVATION;

D O I：

10.1002/aenm.201700758

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：

Recently, considerable progress is achieved in lab prototype perovskite solar cells (PSCs); however, the stability of outdoor applications of PSCs remains a challenge due to the high sensitivity of perovskite material under moist and ultraviolet (UV) light conditions. In this work, the UV photostability of PSC devices is improved by incorporating a photon downshifting layer-SrAl2O4: Eu2+, Dy3+ (SAED)-prepared using the pulsed laser deposition approach. Light-induced deep trap states in the photoactive layer are depressed, and UV light-induced device degradation is inhibited after the SAED modification. Optimized power conversion efficiency (PCE) of 17.8% is obtained through the enhanced light harvesting and reduced carrier recombination provided by SAED. More importantly, a solar energy storage effect due to the long-persistent luminescence of SAED is obtained after light illumination is turned off. The introduction of downconverting material with long-persistent luminescence in PSCs not only represents a new strategy to improve PCE and light stability by photoconversion from UV to visible light but also provides a new paradigm for solar energy storage.

引用

页数：8