Room-Temperature and Aqueous Solution-Processed Two-Dimensional TiS2 as an Electron Transport Layer for Highly Efficient and Stable Planar n-i-p Perovskite Solar Cells

Peng Huang; Ligang Yuan; Kaicheng Zhang; Qiaoyun Chen; Yi Zhou; Bo Song; Yongfang Li

doi:10.1021/acsami.8b03225

Room-Temperature and Aqueous Solution-Processed Two-Dimensional TiS₂ as an Electron Transport Layer for Highly Efficient and Stable Planar n-i-p Perovskite Solar Cells

ACS Appl Mater Interfaces. 2018 May 2;10(17):14796-14802. doi: 10.1021/acsami.8b03225. Epub 2018 Apr 19.

Authors

Peng Huang¹, Ligang Yuan¹, Kaicheng Zhang¹, Qiaoyun Chen¹, Yi Zhou¹, Bo Song¹, Yongfang Li^{1

2}

Affiliations

¹ Laboratory of Advanced Optoelectronic Materials, College of Chemistry Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China.
² CAS Research/Education Center for Excellence in Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.

PMID: 29633824
DOI: 10.1021/acsami.8b03225

Abstract

In this study, a room-temperature and aqueous solution-processed two-dimensional (2D) transition-metal dichalcogenide TiS₂ was applied as an electron transport layer (ETL) in planar n-i-p perovskite solar cells (Pero-SCs). Upon insertion of the 2D TiS₂ ETL with UV-ozone (UVO) treatment, the power conversion efficiency (PCE) of the planar Pero-SCs was optimized to 18.79%. To the best of our knowledge, this value should be the highest efficiency to date among those PCEs of the n-i-p Pero-SCs with room-temperature-processed metal compound ETLs. More importantly, the n-i-p Pero-SCs with the UVO-treated 2D TiS₂ as an ETL also show extremely high stability, where the average PCE remained over 95% of its initial value after 816 h storage without encapsulation.

Keywords: UVO-treated 2D TiS2; electron transport layer; planar n−i−p perovskite solar cells; room-temperature and aqueous solution-processed.