Solution evaporation processed high quality perovskite films

Aqiang Liu; Kang Liu; Huimin Zhou; Hongmei Li; Xiaoqing Qiu; Yi Yang; Min Liu

doi:10.1016/j.scib.2018.11.004

Solution evaporation processed high quality perovskite films

Sci Bull (Beijing). 2018 Dec 15;63(23):1591-1596. doi: 10.1016/j.scib.2018.11.004. Epub 2018 Nov 12.

Authors

Aqiang Liu¹, Kang Liu², Huimin Zhou², Hongmei Li², Xiaoqing Qiu³, Yi Yang⁴, Min Liu⁵

Affiliations

¹ School of Physics and Electronics, and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China.
² Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China.
³ School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. Electronic address: [email protected].
⁴ School of Physics and Electronics, and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China. Electronic address: [email protected].
⁵ Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha 410083, China; State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China. Electronic address: [email protected].

PMID: 36751081
DOI: 10.1016/j.scib.2018.11.004

Abstract

Organic-inorganic hybrid perovskite solar cells (PSCs), due to their high power conversion efficiency (PCE) and low cost, have been considered as one of the most promising photovoltaic devices. Well-distributed large-grain perovskite crystals play an important role for light adsorption and charge transfer. While, high quality perovskite crystals closely relate to the preparation method. Generally, the preparation of perovskite films requires a nitrogen atmosphere and toxic anti-solvents, which hinder their practical applications. Here, we reported a novel and simple solution evaporation process followed with a methylammonium iodide (MAI) solution immersion to prepare high quality perovskite films. Porous lead iodide (PbI₂) films were firstly formed by evaporation of PbI₂ precursor solution. The obtained porous PbI₂ films were completely transformed into well-distributed large-grain perovskite films after a quick MAI solution immersion. As a result, the corresponding PCE was enhanced by 30% compared to that prepared with a regular sequential deposition. This solution evaporation method provides a convenient and practical way for preparing high-quality perovskite films.

Keywords: High-quality films; Perovskite; Power conversion efficiency; Solution evaporation.