title: HONH3Cl optimized CH3NH3PbI3films for improving performance of planar heterojunction perovskite solar cells via a one-step route.
abstract: Planar heterojunction perovskite solar cells (PHJ-PSCs) constructed with one-step precursor solution spin-coating deposition (OPSSD) usually give an extremely low performance mainly due to the poor morphology and low crystallinity of the perovskite films. In this work, by incorporating a suitable HONH3Cl additive in the perovskite precursor solution, a high quality perovskite film with improved morphology and crystallinity was obtained. The UV-vis measurement of the CH3NH3I solutions without and with HONH3Cl demonstrates that the improved quality of the perovskite film can be easily attributed to a combined effect of N2, I2, H2O and CH3NH3Cl originating from the oxidation of CH3NH3I triggered by the HONH3Cl additive, which can manipulate the crystallization process of the perovskite. Accordingly, the improved performance for the HONH3Cl-induced PHJ-PSCs can also be demonstrated. At the optimized molar ratio of 1 : 1 : 0.1 for PbI2: CH3NH3I : HONH3Cl, the PHJ-PSCs exhibit an average power conversion efficiency (PCE) of 10.61 ± 0.51%, which is much higher than that of pristine 1 : 1 : 0 based cells without additive (7.21 ± 0.61%), and the best performing HONH3Cl-induced device can yield a PCE as high as 11.12% with a Jscof 18.42 mA cm-2, Vocof 0.95 V and FF of 0.63. Introducing suitable HONH3Cl as an additive into the perovskite precursor solution is really an effective route to enhance the performance of the PHJ-PSCs via OPSSD.
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn and College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, P. R. China.
authors.forename: Guo-Hua
authors.initials: GH
authors.lastname: Dong
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Teng-Ling
authors.initials: TL
authors.lastname: Ye
authors.affiliation: No. 4 High School of Xiang Yang, Hubei 441021, P. R. China.
authors.forename: Bo-Yu
authors.initials: BY
authors.lastname: Pang
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Yang
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Sheng
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Shi
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Rui-Qing
authors.initials: RQ
authors.lastname: Fan
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Li-Guo
authors.initials: LG
authors.lastname: Wei
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Su