Phase Transition Control for High-Performance Blade-Coated Perovskite Solar Cells

By Jianbo Li, R. Munir, Yuanyuan Fan, Tianqi Niu, Yucheng Liu, Yufei Zhong, Zhou Yang, Yuansi Tian, Bo Liu, Jie Sun and 5 more. Joule, 2018

218 citations recorded by the source corpus.

Summary Here, we have identified that the key issue for rational transitioning from spin-coating to blade-coating processes of perovskite films arises from whether intermediate phases participate in the phase transition. In situ characterizations were carried out to provide a comprehensive picture of structural evolution and crystal growth mechanisms. These findings present opportunities for designing an effective process for blade-coating perovskite film: a large-grained dense perovskite film with high crystal quality and photophysical properties can be obtained only via direct crystallization for both spin-coating and blade-coating processes. As a result, the blade-coated MAPbI3 films deliver excellent charge-collection efficiency at both short circuit and open circuit, and photovoltaic properties with efficiencies of 18.74% (0.09 cm2) and 17.06% (1 cm2) in planar solar cells. The significant advances in understanding how the phase transition links spin-coating and blade-coating processes should provide a path toward high-performance printed perovskite devices.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/97c8e10cb724db5795bfcbce88dee1af026b3bdd