P
Pengyu Sun
Researcher at University of California, Los Angeles
Publications - 31
Citations - 5569
Pengyu Sun is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Perovskite (structure) & Perovskite solar cell. The author has an hindex of 24, co-authored 27 publications receiving 4116 citations.
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Journal ArticleDOI
Single Crystal Formamidinium Lead Iodide (FAPbI3): Insight into the Structural, Optical, and Electrical Properties.
Qifeng Han,Sang-Hoon Bae,Pengyu Sun,Yao-Tsung Hsieh,Yang Michael Yang,You Seung Rim,Hongxiang Zhao,Qi Chen,Wangzhou Shi,Gang Li,Yang Yang +10 more
TL;DR: The phase transition of FAPbI3 between the α-phase and δ-phase is studied and photodetectors based on single-crystal FAP bI3 are demonstrated.
Journal ArticleDOI
2D perovskite stabilized phase-pure formamidinium perovskite solar cells
Jin-Wook Lee,Zhenghong Dai,Tae Hee Han,Chungseok Choi,Sheng-Yung Chang,Sung-Joon Lee,Nicholas De Marco,Hongxiang Zhao,Pengyu Sun,Yu Huang,Yang Yang +10 more
TL;DR: The fabrication of phase-pure formamidinium-lead tri-iodide perovskite films with excellent optoelectronic quality and stability is reported with an order of magnitude enhanced photoluminescence lifetime.
Journal ArticleDOI
Guanidinium: A Route to Enhanced Carrier Lifetime and Open-Circuit Voltage in Hybrid Perovskite Solar Cells
Nicholas De Marco,Huanping Zhou,Qi Chen,Pengyu Sun,Zonghao Liu,Lei Meng,En-Ping Yao,Yongsheng Liu,Andy Schiffer,Yang Yang +9 more
TL;DR: A simple method for suppressing nonradiative carrier loss in hybrid perovskites to further improve performances toward highly efficient solar cells is presented.
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The optoelectronic role of chlorine in CH3NH3PbI3(Cl)-based perovskite solar cells
Qi Chen,Huanping Zhou,Yihao Fang,Adam Z. Stieg,Tze-Bin Song,Hsin-Hua Wang,Xiaobao Xu,Yongsheng Liu,Shirong Lu,Jingbi You,Pengyu Sun,Jeff McKay,Mark S. Goorsky,Yang Yang +13 more
TL;DR: An effective strategy to investigate the role of the extrinsic ion in the context of optoelectronic properties, in which the morphological factors that closely correlate to device performance are mostly decoupled is reported.
Journal ArticleDOI
Caffeine Improves the Performance and Thermal Stability of Perovskite Solar Cells
Rui Wang,Jingjing Xue,Lei Meng,Jin-Wook Lee,Zipeng Zhao,Pengyu Sun,Le Cai,Tianyi Huang,Zhengxu Wang,Zhao-Kui Wang,Zhao-Kui Wang,Yu Duan,Yu Duan,Jonathan Lee Yang,Shaun Tan,Yonghai Yuan,Yu Huang,Yang Yang +17 more
TL;DR: In this paper, 1,3,7-trimethylxanthine, a commodity chemical with two conjugated carboxyl groups better known by its common name caffeine, improves the performance and thermal stability of perovskite solar cells.