Investigation of the Stability of Methylammonium Lead Iodide (MAPbI3) Film Doped with Lead Cesium Triiodide (CsPbI3) Quantum Dots under an Oxygen Plasma Atmosphere

Pao-Hsun Huang; Chi-Wei Wang; Shui-Yang Lien; Kuan-Wei Lee; Na-Fu Wang; Chien-Jung Huang

doi:10.3390/molecules26092678

Investigation of the Stability of Methylammonium Lead Iodide (MAPbI₃) Film Doped with Lead Cesium Triiodide (CsPbI₃) Quantum Dots under an Oxygen Plasma Atmosphere

Molecules. 2021 May 3;26(9):2678. doi: 10.3390/molecules26092678.

Authors

Pao-Hsun Huang¹, Chi-Wei Wang², Shui-Yang Lien^{3

4

5}, Kuan-Wei Lee⁶, Na-Fu Wang⁷, Chien-Jung Huang²

Affiliations

¹ School of Information Engineering, Jimei University, 183 Yinjiang Rd., Jimei District, Xiamen 361021, China.
² Department of Applied Physics, National University of Kaohsiung, Kaohsiung University Rd., Kaohsiung 81148, Taiwan.
³ School of Opto-Electronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China.
⁴ Department of Materials Science and Engineering, Da-Yeh University, Dacun, Changhua 51591, Taiwan.
⁵ Fujian Key Laboratory of Optoelectronic Technology and Devices, Xiamen University of Technology, Xiamen 361024, China.
⁶ Department of Electronic Engineering, I-Shou University, Kaohsiung 84001, Taiwan.
⁷ Department of Electronic Engineering, Cheng Shiu University, Kaohsiung 84008, Taiwan.

Abstract

In this study, we describe composited perovskite films based on the doping of lead cesium triiodide (CsPbI₃) quantum dots (QDs) into methylammonium lead iodide (MAPbI₃). CsPbI₃ QDs and MAPbI₃ were prepared by ligand-assisted re-precipitation and solution mixing, respectively. These films were optimized by oxygen plasma treatment, and the effect of powers from 0 to 80 W on the structural properties of the composited perovskite films is discussed. The experimental results showed that the light-harvesting ability of the films was enhanced at 20 W. The formation of the metastable state (lead(II) oxide and lead tetroxide) was demonstrated by peak differentiation-imitating. A low power enhanced the quality of the films due to the removal of organic impurities, whereas a high power caused surface damage in the films owing to the severe degradation of MAPbI₃.

Keywords: composite perovskite; doped; methylammonium lead iodide; oxygen plasma; quantum dots.