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Title: Improved Performance and Reliability of p-i-n Perovskite Solar Cells via Doped Metal Oxides
Authors: Savva, Achilleas 
Burgués-Ceballos, Ignasi 
Choulis, Stelios A. 
Keywords: Carrier selective contacts;Doped metal oxides;Flexible photovoltaic devices;P-i-n perovskite photovoltaics;Perovskite solar cells
Category: Materials Engineering
Field: Engineering and Technology
Issue Date: 21-Sep-2016
Publisher: Wiley-VCH Verlag
Source: Advanced Energy Materials, 2016, Volume 6, Issue 18, Article number 1600285
DOI: 10.1002/aenm.201600285
Abstract: Perovskite photovoltaics (PVs) have attracted attention because of their excellent power conversion efficiency (PCE). Critical issues related to large area PV performance, reliability and lifetime need to be addressed. Here, we show that doped metal oxides can provide ideal electron selectivity, improved reliability and stability for perovskite PVs. We report p-i-n perovskite PVs with device areas ranging from 0.09cm2 to 0.5cm2 incorporating a thick aluminum doped zinc oxide (AZO) electron selective contact with hysteresis-free PCE of over 13% and high fill factor values in the range of 80%. AZO provides suitable energy levels for carrier selectivity, neutralizes the presence of pinholes and provides intimate interfaces. Devices using AZO exhibit an average PCE increase of over 20% compared with the devices without AZO and maintain the high PCE for the larger area devices reported. Furthermore, the device stability of p-i-n perovskite solar cells under the ISOS-D-1 is enhanced when AZO is used, and maintains 100% of the initial PCE for over 1000 hours of exposure when AZO/Au is used as the top electrode. Our results indicate the importance of doped metal oxides as carrier selective contacts to achieve reliable and high performance long lived large area perovskite solar cells.
ISSN: 16146832
Rights: © 2016 The Authors.
Type: Article
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