NDLI: Solid state photoelectrochemical cells utilising graphite thin films counter electrode

Content Provider	Springer Nature Link
Author	Rahman, M. Y. A. Salleh, M. M. Talib, I. A. Yahaya, M.
Copyright Year	2005
Abstract	This paper reports the use of graphite thin films as a counter electrode of a solid state photoelectrochemical cells of ITO/TiO$_{2}$/PVC-LiClO$_{4}$/graphite. The photoelectrochemical cells material was a screen-printed layer of titanium dioxide onto an ITO-covered glass substrate which was used as a working electrode of the device. The solid electrolyte used was PVC-LiClO$_{4}$ that was prepared by solution casting technique. The graphite films which serve as a counter electrode were prepared onto glass substrate by electron beam evaporation technique at substrate temperatures variation of 25, 50, 100, 150 and 200 °C. The dependence of sheet resistance and surface morphology of the graphite films on substrate temperature were studied. The films deposited at 25 °C shows the smoothest surface morphology and the smallest grain size. Bigger grain size, rougher surface morphology of graphite film counter electrode. The current-voltage characteristics of four devices utilising the graphite counter electrode with different substrate temperature in dark as well as under illumination of 100 mWcm$^{−2}$ light from a tungsten halogen lamp were recorded at room temperature and at 50 °C, respectively. It was found that the photovoltaic parameters of the device such as short-circuit current density, J$_{sc}$ and open-circuit voltage, V$_{oc}$ increases with the decreasing average grain size of the graphite counter electrode. The device whose graphite film counter electrode was deposited onto the glass substrate at 25 °C gave the highest J$_{sc}$ of 0.32 µA/cm$^{2}$ and V$_{oc}$ of 117 mV, respectively.
Starting Page	275
Ending Page	280
Page Count	6
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	11
Issue Number	3-4
e-ISSN	18620760
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Electrochemistry Materials Science Condensed Matter Electrical Power Generation and Transmission Renewable Energy Sources
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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