Weiguang Xie

Emerging thin film technology

Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong, China

Email: wgxie@email.jnu.edu.cn

Biography

Prof. Weiguang Xie received his PhD from Sun Yat-sen University in 2008. He is now a professor in Jinan University. His main research interests cover the optoelectrical properties and application of van der Waals materials and perovskite materials. Prof. Xie has published over 100 research papers, and filed 10 patents. He has won the first prize of the Science and Technology Award of the Chinese Association for Analysis and Testing in 2016, and the second prize of Science Technology Improvement Award at a higher institution in China in 2014.

Abstract for Presentation

Vacuum deposited perovskite thin film for optoelectrical application

Perovskite thin film shows superior optoelectrical properties that are attracted in optoelectrical application. Solvent preparation suffered from toxic solvent, solvent infiltration in integrated device, and difficulty of scaling-up. Vacuum deposition is a toxic-solvent-free method that is compatible to current industrial production. Here, we show the fabrication of perovskite solar cell and imaging sensor using vacuum deposition [1-3]. First, vacuum deposited 3D-2D perovskites were fabricated by converting the top surface of 3D-MAPbI3 to 2D perovskite. 3D-2D devices show champion PCE of 16.50% with significantly improved humidity and thermal stability in one month period, and the mechanism is illustrated. Second, the structural evolution of thin film during the reaction process between mix-vapor (R-NH3I/MAI) and PbI2 is investigated. We prove that electron-donating ability is the key factor to modulate the lattices structural evolution of perovskite thin film in vacuum deposition. Finally, we achieve an efficiency of 18.23% (0.045 cm2) and 15.48% (1 cm2) in passivation device and its stability was significantly improved. Finally, we show the fabrication of perovskite thin film imaging sensor for video capture under full-frame illumination.

References

[1] Dongxu Lin, Pengyi Liu, Weiguang Xie*, Acta Physica Sinica, 68 (2019) 078801.

[2] Dongxu Lin, Pengyi Liu, Weiguang Xie*, Nano Energy, 59 (2019) 619-625.

[3] Dongxu Lin, Pengyi Liu, Weiguang Xie*, Nano Energy, 84 (2021) 105893.