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Published on: September 27, 2018
Tailoring the crystallization dynamics of CsPbI2Br films for efficient and air-stable solar cells
Jinyue Zhang1, Renni Luan1,2, Jiajun Liu1
1Qingdao Perovskite Photovoltaic and Application Engineering Research Center, Institute of Carbon Neutrality, College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, P. R. China. doujie@sdust.edu.cn.
Abstract:
This study introduces diphenylphosphine oxide (DPPO), a Lewis basic molecule, to control perovskite crystallization in air. DPPO interacts strongly with Pb2+, benefiting the improvement of the perovskite film and the passivation of defects. Consequently, air-processed CsPbI2Br solar cells achieved 14.61% efficiency and retained 83.02% of their initial efficiency after 45 days under an air environment without encapsulation.
