Enhanced Stability of MAPbI3 Perovskite Solar Cells using Poly(p-chloro-xylylene) Encapsulation

Hyojung Kim; Jiyong Lee; Bora Kim; Hye Ryung Byun; Sung Hyuk Kim; Hye Min Oh; Seunghyun Baik; Mun Seok Jeong

doi:10.1038/s41598-019-51945-9

Enhanced Stability of MAPbI₃ Perovskite Solar Cells using Poly(p-chloro-xylylene) Encapsulation

Sci Rep. 2019 Oct 29;9(1):15461. doi: 10.1038/s41598-019-51945-9.

Authors

Hyojung Kim¹, Jiyong Lee¹, Bora Kim¹, Hye Ryung Byun², Sung Hyuk Kim¹, Hye Min Oh¹, Seunghyun Baik^{3

4}, Mun Seok Jeong^{5

6}

Affiliations

¹ Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
² Department of Physics, Sogang University, Seoul, 04107, Republic of Korea.
³ Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea. sbaik@me.skku.ac.kr.
⁴ School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea. sbaik@me.skku.ac.kr.
⁵ Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea. mjeong@skku.edu.
⁶ Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea. mjeong@skku.edu.

Abstract

We demonstrated an effective poly(p-chloro-xylylene) (Parylene-C) encapsulation method for MAPbI₃ solar cells. By structural and optical analysis, we confirmed that Parylene-C efficiently slowed the decomposition reaction in MAPbI₃. From a water permeability test with different encapsulating materials, we found that Parylene-C-coated MAPbI₃ perovskite was successfully passivated from reaction with water, owing to the hydrophobic behavior of Parylene-C. As a result, the Parylene-C-coated MAPbI₃ solar cells showed better device stability than uncoated cells, virtually maintaining the initial power conversion efficiency value (15.5 ± 0.3%) for 196 h.