P
Pengfei Liu
Researcher at Beijing Institute of Technology
Publications - 9
Citations - 1294
Pengfei Liu is an academic researcher from Beijing Institute of Technology. The author has contributed to research in topics: Perovskite (structure) & Thin film. The author has an hindex of 9, co-authored 9 publications receiving 725 citations.
Papers
More filters
Journal ArticleDOI
Strain engineering in perovskite solar cells and its impacts on carrier dynamics.
Cheng Zhu,Xiuxiu Niu,Yuhao Fu,Nengxu Li,Chen Hu,Yihua Chen,Xin He,Guangren Na,Pengfei Liu,Huachao Zai,Yang Ge,Yue Lu,Xiaoxing Ke,Yang Bai,Shihe Yang,Shihe Yang,Pengwan Chen,Yujing Li,Manling Sui,Lijun Zhang,Huanping Zhou,Qi Chen +21 more
TL;DR: The impact of the gradient in-plane strain on the carrier dynamics of the strained perovskite films and optimize the device efficiency is studied to enhance PCEs up to 20.7% (certified) in devices via rational strain engineering.
Journal ArticleDOI
Grain‐Boundary “Patches” by In Situ Conversion to Enhance Perovskite Solar Cells Stability
Lang Liu,Sheng Huang,Yue Lu,Pengfei Liu,Yizhou Zhao,Congbo Shi,Siyu Zhang,Jiafeng Wu,Haizheng Zhong,Manling Sui,Huanping Zhou,Haibo Jin,Yujing Li,Qi Chen +13 more
TL;DR: MMI is employed for the first time to construct a surface "patch" by in situ converting residual PbI2 at GBs, which can effectively suppress ion migration and inhibit diffusion of the metal electrodes in a perovskite-based optoelectronics complex.
Journal ArticleDOI
Interfacial Residual Stress Relaxation in Perovskite Solar Cells with Improved Stability.
Hao Wang,Cheng Zhu,Lang Liu,Sai Ma,Pengfei Liu,Jiafeng Wu,Congbo Shi,Qin Du,Yanmin Hao,Sisi Xiang,Haining Chen,Pengwan Chen,Yang Bai,Huanping Zhou,Yujing Li,Qi Chen +15 more
TL;DR: A "bone-joint" configuration is constructed within the interface between the absorber and the carrier transport layer, which improves device performance substantially and exhibits an efficiency of 21.48% with good humidity stability and improved resistance against thermal cycling.
Journal ArticleDOI
Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells
Yihua Chen,Nengxu Li,Ligang Wang,Liang Li,Ziqi Xu,Haoyang Jiao,Pengfei Liu,Cheng Zhu,Huachao Zai,Mingzi Sun,Wei Zou,Shuai Zhang,Guichuan Xing,Xinfeng Liu,Jianpu Wang,Dongdong Li,Bolong Huang,Qi Chen,Huanping Zhou +18 more
TL;DR: Chen et al. show that by fine tuning the alkaline environment in precursor solution, they can greatly suppress defects density and obtain high certified efficiency of 20.87% in the planar heterojunction perovskite solar cell.