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Issue 1, 2016
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Planar heterojunction organometal halide perovskite solar cells: roles of interfacial layers

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Abstract

Organometal halide perovskites are promising photo-absorption materials in solar cells due to their high extinction coefficient, broad light absorption range and excellent semiconducting properties. The highest power conversion efficiency (PCE) of perovskite solar cells (PrSCs) is now 20.1%. However, a high-temperature processed mesoscopic metal oxide (e.g., TiO2) must be removed to realize flexible PrSCs on plastic substrates using low temperature processes. Although the planar heterojunction (PHJ) structure can be considered as the most appropriate structure for flexible PrSCs, they have shown lower PCEs than those with a mesoscopic metal oxide layer. Therefore, development of interfacial layers is essential for achieving highly efficient PHJ PrSCs, and necessary in fabrication of flexible PrSCs. This review article gives an overview of progress in PHJ PrSCs and the roles of interfacial layers in the device, and suggests a practical strategy to fabricate highly efficient and flexible PHJ PrSCs. We conclude with our technical suggestion and outlook for further research direction.

Graphical abstract: Planar heterojunction organometal halide perovskite solar cells: roles of interfacial layers

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Article information


Submitted
15 Jul 2015
Accepted
13 Oct 2015
First published
13 Oct 2015

Energy Environ. Sci., 2016,9, 12-30
Article type
Review Article
Author version available

Planar heterojunction organometal halide perovskite solar cells: roles of interfacial layers

H. Kim, K. Lim and T. Lee, Energy Environ. Sci., 2016, 9, 12
DOI: 10.1039/C5EE02194D

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