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Issue 10, 2015
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Highly efficient planar perovskite solar cells through band alignment engineering

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Abstract

The simplification of perovskite solar cells (PSCs), by replacing the mesoporous electron selective layer (ESL) with a planar one, is advantageous for large-scale manufacturing. PSCs with a planar TiO2 ESL have been demonstrated, but these exhibit unstabilized power conversion efficiencies (PCEs). Herein we show that planar PSCs using TiO2 are inherently limited due to conduction band misalignment and demonstrate, with a variety of characterization techniques, for the first time that SnO2 achieves a barrier-free energetic configuration, obtaining almost hysteresis-free PCEs of over 18% with record high voltages of up to 1.19 V.

Graphical abstract: Highly efficient planar perovskite solar cells through band alignment engineering

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Supplementary files

Article information


Submitted
24 Aug 2015
Accepted
24 Aug 2015
First published
25 Aug 2015

This article is Open Access

Energy Environ. Sci., 2015,8, 2928-2934
Article type
Communication
Author version available

Highly efficient planar perovskite solar cells through band alignment engineering

J. P. Correa Baena, L. Steier, W. Tress, M. Saliba, S. Neutzner, T. Matsui, F. Giordano, T. J. Jacobsson, A. R. Srimath Kandada, S. M. Zakeeruddin, A. Petrozza, A. Abate, M. K. Nazeeruddin, M. Grätzel and A. Hagfeldt, Energy Environ. Sci., 2015, 8, 2928
DOI: 10.1039/C5EE02608C

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