Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells

Lin, X, Jumabekov, A, Lal, N, Pascoe, A, Gomez, D, Duffy, N, Chesman, A, Sears, K, Fournier, M, Zhang, Y, Bao, Q, Cheng, Y, Spiccia, L and Bach, U 2017, 'Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells', Nature Communications, vol. 8, no. 1, pp. 1-8.

Document type: Journal Article
Collection: Journal Articles

Title Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells
Author(s) Lin, X
Jumabekov, A
Lal, N
Pascoe, A
Gomez, D
Duffy, N
Chesman, A
Sears, K
Fournier, M
Zhang, Y
Bao, Q
Cheng, Y
Spiccia, L
Bach, U
Year 2017
Journal name Nature Communications
Volume number 8
Issue number 1
Start page 1
End page 8
Total pages 8
Publisher Nature
Abstract Hybrid organic-inorganic halide perovskites are low-cost solution-processable solar cell materials with photovoltaic properties that rival those of crystalline silicon. The perovskite films are typically sandwiched between thin layers of hole and electron transport materials, which efficiently extract photogenerated charges. This affords high-energy conversion efficiencies but results in significant performance and fabrication challenges. Herein we present a simple charge transport layer-free perovskite solar cell, comprising only a perovskite layer with two interdigitated gold back-contacts. Charge extraction is achieved via self-assembled monolayers and their associated dipole fields at the metal-perovskite interface. Photovoltages of ∼600 mV generated by self-assembled molecular monolayer modified perovskite solar cells are equivalent to the built-in potential generated by individual dipole layers. Efficient charge extraction results in photocurrents of up to 12.1 mA cm -2 under simulated sunlight, despite a large electrode spacing.
Subject Physical Chemistry of Materials
Nanofabrication, Growth and Self Assembly
Keyword(s) Self-Assembled Monolayers
Organometal Trihalide Perovskite
Halide Perovskites
DOI - identifier 10.1038/s41467-017-00588-3
Copyright notice © 2017 The Author(s). Open Access This article is licensed under a Creative Commons Attribution 4.0
ISSN 2041-1723
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