Please use this identifier to cite or link to this item: https://doi.org/10.1109/SIECPC.2011.5876997
Title: Morphological dependance of charge transport in nanostructured ZnO-based dye sensitized solar cells
Authors: Elumalai, N.K.
Tan, M.J.
Lee, J.X.
Dolmanan, S.
Lin, K.K.
Bin, L. 
Nair, A.S. 
Chellappan, V.
Ramakrishna, S. 
Keywords: Diffusion coefficient
Dye sensitized solar cells
Electron Transport
Transient photocurrent
Zinc Oxide
Issue Date: 2011
Source: Elumalai, N.K.,Tan, M.J.,Lee, J.X.,Dolmanan, S.,Lin, K.K.,Bin, L.,Nair, A.S.,Chellappan, V.,Ramakrishna, S. (2011). Morphological dependance of charge transport in nanostructured ZnO-based dye sensitized solar cells. Saudi International Electronics, Communications and Photonics Conference 2011, SIECPC 2011 : -. ScholarBank@NUS Repository. https://doi.org/10.1109/SIECPC.2011.5876997
Abstract: Zinc oxide (ZnO) photoanodes of two different morphologies - nanorods and nanosheets are used to fabricate dye sensitised solar cells in order to study the influence of morphology on device performance. Characteristics such as dye loading capacity and light scattering ability of the photoanodes depend on the morphology to a large extent. This leads to change in the electron transport properties, which in turn affects power conversion efficiency. Here we report the difference in the charge transport properties of these morphologies evaluated using the time resolved photocurrent measurements. The photocurrent transients for ZnO nano-rod film exhibited dual peak behaviour, whereas transients for ZnO nano-sheet film exhibited only one peak as the time delayed second peak corresponding to slow electron diffusion was totally suppressed. The transient photocurrent decay also indicates that the charge transport rate is much faster in the ZnO nano-sheets, which allows the efficient charge collection over much larger thickness compared to other ZnO nano-rod film. The power conversion efficiency (PCE) of the devices was found to be 1.6% and 1.5 % for the ZnO-nano-rod and nano-sheet based dye sensitized solar cells respectively. A comparative study is performed and the photovoltaic parameters obtained in each case are correlated with the photocurrent transients enabling better understanding of the impact of morphology. © 2011 IEEE.
Source Title: Saudi International Electronics, Communications and Photonics Conference 2011, SIECPC 2011
URI: http://scholarbank.nus.edu.sg/handle/10635/73640
ISBN: 9781457700699
DOI: 10.1109/SIECPC.2011.5876997
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

38
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.