Ultrafast charge carrier relaxation and charge transfer processes in CdS/CdTe thin films

PANDIT, Bill, DHARMADASA, Ruvini, DHARMADASA, I, DRUFFEL, Thad and LIU, Jinjun (2015). Ultrafast charge carrier relaxation and charge transfer processes in CdS/CdTe thin films. Physical Chemistry Chemical Physics, 17 (26), 16760-16766.

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Official URL: http://pubs.rsc.org/en/Content/ArticleHtml/2015/CP...
Link to published version:: 10.1039/c5cp01652e

Abstract

Ultrafast transient absorption pump–probe spectroscopy (TAPPS) has been employed to investigate charge carrier relaxation in cadmium sulfide/cadmium telluride (CdS/CdTe) nanoparticle (NP)-based thin films and electron transfer (ET) processes between CdTe and CdS. Effects of post-growth annealing treatments to ET processes have been investigated by carrying out TAPPS experiments on three CdS/CdTe samples: as deposited, heat treated, and CdCl2 treated. Clear evidence of ET process in the treated thin films has been observed by comparing transient absorption (TA) spectra of CdS/CdTe thin films to those of CdS and CdTe. Quantitative comparison between ultrafast kinetics at different probe wavelengths unravels the ET processes and enables determination of its rate constants. Implication of the photoinduced dynamics to photovoltaic devices is discussed.

Item Type: Article
Additional Information: ** From Crossref via Jisc Publications Router.
Uncontrolled Keywords: Physical and Theoretical Chemistry, General Physics and Astronomy
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1039/c5cp01652e
Related URLs:
SWORD Depositor: Hilary Ridgway
Depositing User: Hilary Ridgway
Date Deposited: 30 Nov 2017 11:15
Last Modified: 30 Nov 2017 11:15
URI: http://shura.shu.ac.uk/id/eprint/17382

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