Rakshit, Tamita and Mondal, Suvra P and Manna, Indranil and Ray, Samit K (2012) CdS-decorated ZnO nanorod heterostructures for improved hybrid photovoltaic devices. ACS Applied Materials & Interfaces, 4 (11). pp. 6085-6095. ISSN 1944-8244

[img] PDF - Published Version
Restricted to Registered users only

Download (875Kb) | Request a copy

Abstract

Cadmium sulfide (CdS)-decorated zinc oxide (ZnO) nanorod heterostructures have been grown by a combination of hydrothermal and pulsed laser deposition techniques. Hybrid photovoltaic devices have been fabricated with CdS modified and unmodified ZnO nanorods blended separately with regioregular poly(3-hexylthiophene) (P3HT) polymer as the active layer. The solar cell performance has been studied as a function of ZnO concentration and the casting solvent (chlorobenzene, chloroform, and toluene) in the unmodified ZnO:P3HT devices. The power conversion efficiency is found to be enhanced with the increase of ZnO concentration up to a certain limit, and decreases at a very high concentration. The surface modification of ZnO nanorods with CdS leads to an increase in the open circuit voltage and short-circuit current, with enhanced efficiency by 300% over the unmodified ZnO:P3HT device, because of the cascaded band structure favoring charge transfer to the external circuit.

Item Type: Article
Uncontrolled Keywords: solar cells; organic-inorganic heterojunctions; ZnO nanorods; CdS-ZnO heterostructure; photoluminescence quenching
Subjects: Engineering Materials
Divisions: Director´┐Żs Secretariat
Depositing User: Bidhan Chaudhuri
Date Deposited: 14 Jan 2013 11:35
Last Modified: 14 Jan 2013 11:35
URI: http://cgcri.csircentral.net/id/eprint/1842

Actions (login required)

View Item View Item