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Laser-Generated Supranano Liquid Metal as Efficient Electron Mediator in Hybrid Perovskite Solar Cells |
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| Authors: | Huiwu Yu Wenhao Zhao Long Ren Hongyue Wang Pengfei Guo Xiaokun Yang Qian Ye Dmitry Shchukin Yi Du Shixue Dou Hongqiang Wang |
| Affiliation: | 1. State Key Laboratory of Solidification Processing Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072 P. R. China
School of Physics, Northwest University, Xi'an, 710127 P. R. China;2. State Key Laboratory of Solidification Processing Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072 P. R. China;3. Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2500 Australia;4. Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, L69 7ZF UK Department of Physical and Colloid Chemistry, Gubkin University, 65/1 Leninsky Prospect, Moscow, 19991 Russia;5. Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2500 Australia BUAA-UOW Joint Research Centre and School of Physics, Beihang University, Beijing, 100191 P. R. China |
| Abstract: | Creating colloids of liquid metal with tailored dimensions has been of technical significance in nano-electronics while a challenge remains for generating supranano (<10 nm) liquid metal to unravel the mystery of their unconventional functionalities. Present study pioneers the technology of pulsed laser irradiation in liquid from a solid target to liquid, and yields liquid ternary nano-alloys that are laborious to obtain via wet-chemistry synthesis. Herein, the significant role of the supranano liquid metal on mediating the electrons at the grain boundaries of perovskite films, which are of significance to influence the carriers recombination and hysteresis in perovskite solar cells, is revealed. Such embedding of supranano liquid metal in perovskite films leads to a cesium-based ternary perovskite solar cell with stabilized power output of 21.32% at maximum power point tracing. This study can pave a new way of synthesizing multinary supranano alloys for advanced optoelectronic applications. |
| Keywords: | hybrid perovskites laser fragmentation liquid metal colloids solar cells supranano materials |