Formamidinium-based planar heterojunction perovskite solar cells with alkali carbonate-doped zinc oxide layer. Issue 43 (3rd July 2018)

• Record Type: Journal Article
• Authors: Jeong, Jaeki; Kim, Haeyeon; Yoon, Yung Jin; Walker, Bright; Song, Seyeong; Heo, Jungwoo; Park, Song Yi; Kim, Jae Won; Kim, Gi-Hwan; Kim, Jin Young
• Is Part Of: RSC advances. Volume 8:Issue 43(2018)
• Page Start: 24110
• Page End: 24115
• Publication Date: 2018-07-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra02637h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Planar formamidinium perovskite solar cells have been fabricated with an alkali carbonate-doped zinc oxide layer. Abstract : We herein demonstrate n-i-p-type planar heterojunction perovskite solar cells employing spin-coated ZnO nanoparticles modified with various alkali metal carbonates including Li2 CO3, Na2 CO3, K2 CO3 and Cs2 CO3, which can tune the energy band structure of ZnO ETLs. Since these metal carbonates doped on ZnO ETLs lead to deeper conduction bands in the ZnO ETLs, electrons are easily transported from the perovskite active layer to the cathode electrode. The power conversion efficiency of about 27% is improved due to the incorporation of alkali carbonates in ETLs. As alternatives to TiO2 and n-type metal oxides, electron transport materials consisting of doped ZnO nanoparticles are viable ETLs for efficient n-i-p planar heterojunction solar cells, and they can be used on flexible substrates via roll-to-roll processing.