Issue 37, 2015

Epitaxial 1D electron transport layers for high-performance perovskite solar cells

Abstract

We demonstrate high-performance perovskite solar cells with excellent electron transport properties using a one-dimensional (1D) electron transport layer (ETL). The 1D array-based ETL is comprised of 1D SnO2 nanowires (NWs) array grown on a F:SnO2 transparent conducting oxide substrate and rutile TiO2 nanoshells epitaxially grown on the surface of the 1D SnO2 NWs. The optimized devices show more than 95% internal quantum yield at 750 nm, and a power conversion efficiency (PCE) of 14.2%. The high quantum yield is attributed to dramatically enhanced electron transport in the epitaxial TiO2 layer, compared to that in conventional nanoparticle-based mesoporous TiO2 (mp-TiO2) layers. In addition, the open space in the 1D array-based ETL increases the prevalence of uniform TiO2/perovskite junctions, leading to reproducible device performance with a high fill factor. This work offers a method to achieve reproducible, high-efficiency perovskite solar cells with high-speed electron transport.

Graphical abstract: Epitaxial 1D electron transport layers for high-performance perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
26 May 2015
Accepted
19 Aug 2015
First published
24 Aug 2015

Nanoscale, 2015,7, 15284-15290

Author version available

Epitaxial 1D electron transport layers for high-performance perovskite solar cells

G. S. Han, H. S. Chung, D. H. Kim, B. J. Kim, J. Lee, N. Park, I. S. Cho, J. Lee, S. Lee and H. S. Jung, Nanoscale, 2015, 7, 15284 DOI: 10.1039/C5NR03476K

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