|Author||Ye, Qiufeng; Ma, Fei; Zhao, Yang; Yu, Shiqi; Chu, Zema; Gao, Pingqi; Zhang, Xingwang; You, Jingbi|
|Keyword||HALIDE PEROVSKITES PHASE CSPBI2BR ALPHA-CSPBI3 PERFORMANCE FILMS|
|English Abstract||Cesium lead iodide (CsPbI3) perovskite has gained great attention due to its potential thermal stability and appropriate bandgap (approximate to 1.73 eV) for tandem cells. However, the moisture-induced thermodynamically unstable phase and large open-circuit voltage (V-OC) deficit and also the low efficiency seriously limit its further development. Herein, long chain phenylethylammonium (PEA) is utilized into CsPbI3 perovskite to stabilize the orthorhombic black perovskite phase (gamma-CsPbI3) under ambient condition. Furthermore, the moderate lead acetate (Pb(OAc)(2)) is controlled to combine with phenylethylammonium iodide to form the 2D perovskite, which can dramatically suppress the charge recombination in CsPbI3. Unprecedentedly, the resulted CsPbI3 solar cells achieve a 17% power conversion efficiency with a record V-OC of 1.33 V, the V-OC deficit is only 0.38 V, which is close to those in organic-inorganic perovskite solar cells (PSCs). Meanwhile, the PEA modified device maintains 94% of its initial efficiency after exceeding 2000 h of storage in the low-humidity controlled environment without encapsulation.|
|Subject||Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics|
|Affiliation||1.Gao, PQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China.|
2.You, JB (corresponding author), Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China.
4.You, JB (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China.
5.Gao, PQ (corresponding author), Sun Yat Sen Univ, Sch Mat, Guangzhou 510275, Peoples R China.
|Ye, Qiufeng,Ma, Fei,Zhao, Yang,et al. Stabilizing gamma-CsPbI3 Perovskite via Phenylethylammonium for Efficient Solar Cells with Open-Circuit Voltage over 1.3 V[J]. SMALL,2020.|
|APA||Ye, Qiufeng.,Ma, Fei.,Zhao, Yang.,Yu, Shiqi.,Chu, Zema.,...&You, Jingbi.(2020).Stabilizing gamma-CsPbI3 Perovskite via Phenylethylammonium for Efficient Solar Cells with Open-Circuit Voltage over 1.3 V.SMALL.|
|MLA||Ye, Qiufeng,et al."Stabilizing gamma-CsPbI3 Perovskite via Phenylethylammonium for Efficient Solar Cells with Open-Circuit Voltage over 1.3 V".SMALL (2020).|
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