Nano-mesoporous TiO2 Vacancies Modification for Halide Perovskite Solar Cells

Qinglong Jiang 1,2

Liang Wang 3

Chao Yan

Chuntai Liu 5

Zhanhu Guo 6, Email

Ning Wang 1, Email

1 State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China

2 Materials Science Division, Argonne National Laboratory, Lemont, IL, USA

3College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China

4 School of Material Science and Engineering, Jiangsu University of Science and Technology, No 2, Mengxi Rd, Zhenjiang, Jiangsu, China

5 School of Materials Science and Engineering, The Key Laboratory of Material Processing and Mold of Ministry of Education, Zhengzhou University, Zhengzhou, China

6 Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA

Abstract

The efficiency of charge transport at interfaces and bulk affects the performance for lots optoelectronic devices. In this work, vacancies in nano-mesoporous TiO2 have been modified by hydrogen peroxide and the corresponding photoactive electrode for halide perovskite solar cells shows remarkable improvement of current density (Jsc) 36% and open circuit voltage (Voc) 10%, with overall improvement of efficiency over 75%. Photovoltage decay indicates the electron lifetime have been almost doubled after hydrogen peroxide treatment.

Nano-mesoporous TiO2 Vacancies Modification for Halide Perovskite Solar Cells