Quantum-Confined ZnO Nanoshell Photoanodes for Mesoscopic Solar Cells

Chandiran, Aravind Kumar and Abdi-Jalebi, Mojtaba and Yella, Aswani and Dar, Ibrahim M and Yi, Chenyi and Shivashankar, Srinivasrao A and Nazeeruddin, Mohammad K and Graetzel, Michael (2014) Quantum-Confined ZnO Nanoshell Photoanodes for Mesoscopic Solar Cells. In: NANO LETTERS, 14 (3). pp. 1190-1195.

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Abstract

We present a photoanode for dye-sensitized solar cell (DSC) based on ZnO nanoshell deposited by atomic layer deposition at 150 degrees C on a mesoporous insulating template. An ultrathin layer of ZnO between. 3 and 6 nm, which exhibits quantum confinement effect, is found to be sufficient to transport the photogenerated electrons to the external contacts and exhibits near-unity collection efficiency. A 6 nm ZnO nanoshell on a 2.5 mu m mesoporous nanoparticle Al2O3 template yields photovoltaic power conversion efficiency (PCE) of 4.2% in liquid DSC. Perovskite absorber (CH3NH3PbI3) based solid state solar cells made with similar ZnO nanostructures lead to a high PCE of 7%.

Item Type:	Journal Article
Publication:	NANO LETTERS
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copyright for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Keywords:	Dye-sensitized solar cell; zinc oxide; atomic layer deposition; CH3NH3PbI3; quantum confinement; perovskite
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	17 Jun 2014 11:05
Last Modified:	17 Jun 2014 11:06
URI:	http://eprints.iisc.ac.in/id/eprint/49263

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