Molecular Passivation of MoO3 : Band Alignment and Protection of Charge Transport Layers in Vacuum-Deposited Perovskite Solar Cells

Author(s)

Perez-del-Rey, Daniel ^[1] ; Gil-Escrig, Lidon ^[2] ; Zanoni, Kassio P. S. ^{[1, 3]} ; Dreessen, Chris ^[1] ; Sessolo, Michele ^[1] ; Boix, Pablo P. ^[1] ; Bolink, Henk J. ^[1]

Affiliation

^[1] Univ Valencia, Inst Ciencia Mol, C Catedrat J Beltran 2, Paterna 46980 - Spain

^[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, Kekulestr 5, D-12489 Berlin - Germany

^[3] Univ Sao Paulo, Ist Fis Sao Carlos, Av Trab Sao Carlense 400, BR-13566 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: CHEMISTRY OF MATERIALS; v. 31, n. 17, p. 6945-6949, SEP 10 2019.
• Web of Science Citations: 4

Abstract

Vacuum deposition of perovskite solar cells can achieve efficiencies rivaling solution-based methods and allows for more complex device stacks. MoO3 has been used to enhance carrier extraction to the transparent bottom electrode in a p-i-n configuration; here, we show that by inserting an molecular interlayer with a lone pair nitrogen atom and low ionization potential, it can also be used on the top of a perovskite absorber in a n-i-p configuration. This strategy enables the first vacuum-deposited perovskite solar cells with metal oxides as charge transporting layers for both electrons and holes, leading to power conversion efficiency >19%. (AU)

• FAPESP's process: 18/05152-7 - Solution-processed charge-transport layers for efficient perovskite solar cells
• Grantee: Kassio Papi da Silva Zanoni
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor