Phenylalkylamine Passivation of Organolead Halide Perovskites Enabling High-Efficiency and Air-Stable Photovoltaic Cells

Feng Wang; Wei Geng; Yang Zhou; Hong-Hua Fang; Chuan-Jia Tong; Maria Antonietta Loi; Li-Min Liu; Ni Zhao

doi:10.1002/adma.201603062

Phenylalkylamine Passivation of Organolead Halide Perovskites Enabling High-Efficiency and Air-Stable Photovoltaic Cells

Adv Mater. 2016 Dec;28(45):9986-9992. doi: 10.1002/adma.201603062. Epub 2016 Sep 28.

Authors

Feng Wang¹, Wei Geng², Yang Zhou¹, Hong-Hua Fang³, Chuan-Jia Tong², Maria Antonietta Loi³, Li-Min Liu², Ni Zhao^{1

4}

Affiliations

¹ Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong.
² Beijing Computational Science Research Center, Beijing, 100084, P. R. China.
³ Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, Nijenborgh 4, Groningen, 9747 AG, The Netherlands.
⁴ Shenzhen Research Institute, The Chinese University of Hong Kong, Nanshan District, Shenzhen, 518172, P. R. China.

PMID: 27677653
DOI: 10.1002/adma.201603062

Abstract

Benzylamine is introduced as a surface passivation molecule that improves the moisture-resistance of the perovskites while simultaneously enhancing their electronic properties. Solar cells based on benzylamine-modified formamidinium lead iodide perovskite films exhibit a champion efficiency of 19.2% and an open-circuit voltage of 1.12 V. The modified FAPbI₃ films exhibit no degradation after >2800 h air exposure.

Keywords: benzylamine; passivation; perovskite solar cells.