Low-temperature solution-processed perovskite solar cells with high efficiency and flexibility

Jingbi You; Ziruo Hong; Yang Michael Yang; Qi Chen; Min Cai; Tze-Bin Song; Chun-Chao Chen; Shirong Lu; Yongsheng Liu; Huanping Zhou; Yang Yang

doi:10.1021/nn406020d

Low-temperature solution-processed perovskite solar cells with high efficiency and flexibility

ACS Nano. 2014 Feb 25;8(2):1674-80. doi: 10.1021/nn406020d. Epub 2014 Jan 7.

Authors

Jingbi You¹, Ziruo Hong, Yang Michael Yang, Qi Chen, Min Cai, Tze-Bin Song, Chun-Chao Chen, Shirong Lu, Yongsheng Liu, Huanping Zhou, Yang Yang

Affiliation

¹ Department of Materials Science and Engineering and ‡California NanoSystems Institute, University of California-Los Angeles , Los Angeles, California 90095, United States.

PMID: 24386933
DOI: 10.1021/nn406020d

Abstract

Perovskite compounds have attracted recently great attention in photovoltaic research. The devices are typically fabricated using condensed or mesoporous TiO2 as the electron transport layer and 2,2'7,7'-tetrakis-(N,N-dip-methoxyphenylamine)9,9'-spirobifluorene as the hole transport layer. However, the high-temperature processing (450 °C) requirement of the TiO2 layer could hinder the widespread adoption of the technology. In this report, we adopted a low-temperature processing technique to attain high-efficiency devices in both rigid and flexible substrates, using device structure substrate/ITO/PEDOT:PSS/CH(3)NH(3)PbI(3-x)Cl(x)/PCBM/Al, where PEDOT:PSS and PCBM are used as hole and electron transport layers, respectively. Mixed halide perovskite, CH(3)NH(3)PbI(3-x)Cl(x), was used due to its long carrier lifetime and good electrical properties. All of these layers are solution-processed under 120 °C. Based on the proposed device structure, power conversion efficiency (PCE) of 11.5% is obtained in rigid substrates (glass/ITO), and a 9.2% PCE is achieved for a polyethylene terephthalate/ITO flexible substrate.