Issue 46, 2017, Issue in Progress

Graphene/ZnO nanocomposite as an electron transport layer for perovskite solar cells; the effect of graphene concentration on photovoltaic performance

Abstract

Perovskite solar cells (PSCs) have been fabricated by a graphene/ZnO nanocomposite (G/ZnO NC) as an electron transporting layer. We use a novel spray deposition method compatible with large area processing methods for deposition of pristine ZnO and G/ZnO NC films. We show the effect of varying the graphene concentration in the G/ZnO NC films from 0 to 1 wt% on the photovoltaic performance of PSCs. We find that a 0.75 wt% graphene concentration in the G/ZnO NC films gives an optimum PSC performance with short circuit current density and power conversion efficiencies going up from 15.54 to 19.97 mA cm−2, and 7.01 to 10.34% respectively as compared to pristine ZnO. The enhancement in photovoltaic performance is attributed to the superior growth of the perovskite thin-film and enhanced electron transport/extraction on using the graphene network in the NC.

Graphical abstract: Graphene/ZnO nanocomposite as an electron transport layer for perovskite solar cells; the effect of graphene concentration on photovoltaic performance

Article information

Article type
Paper
Submitted
18 Feb 2017
Accepted
23 May 2017
First published
30 May 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 28610-28615

Graphene/ZnO nanocomposite as an electron transport layer for perovskite solar cells; the effect of graphene concentration on photovoltaic performance

P. S. Chandrasekhar and V. K. Komarala, RSC Adv., 2017, 7, 28610 DOI: 10.1039/C7RA02036H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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