Enhanced Solar Photoelectrochemical Conversion Efficiency of ZnO:Cu Electrodes for Water-Splitting Application

International Journal of Photoenergy - Tập 2013 - Trang 1-9 - 2013
Rekha Dom1, Lijin Rose Baby1, Hyun Gyu Kim2, Pramod H. Borse1
1Solar H2 PEC Lab., International Advanced Research Centre for Powder Metallurgy and New Materials, Balapur PO, Hyderabad, Andhra Pradesh 500 005
2Division of High Technology Materials Research, Korea Basic Science Institute (KBSI), Busan 618-230, Republic of Korea

Tóm tắt

n-typeZnO:Cu photoanodes were fabricated by simple spray pyrolysis deposition technique. Influence of low concentration (range ~10−4–10−1%) of Cu doping in hexagonal ZnO lattice on its photoelectrochemical performance has been investigated. The doped photoanodes displayed 7-time enhanced conversion efficiencies with respect to their undoped counterpart, as estimated from the photocurrents generated under simulated solar radiation. This is the highest enhancement in the solar conversion efficiency reported so far for the Cu-doped ZnO. This performance is attributed to the red shift in the band gap of the Cu-doped films and is in accordance with the incident-photon-current-conversion efficiency (IPCE) measurements. Electrochemical studies reveal ann-typenature of these photoanodes. Thus, the study indicates a high potential of doped ZnO films for solar energy applications, in purview of the development of simple nanostructuring methodologies.

Từ khóa


Tài liệu tham khảo

10.1038/238037a0

10.1126/science.1075035

10.1126/science.1137014

10.1126/science.280.5362.425

10.1039/c1jm14355g

10.1002/adfm.200801363

10.1038/35104607

10.1016/S0360-3199(02)00022-8

10.1126/science.1061051

10.1016/j.ijhydene.2011.07.145

10.1039/c0jm00704h

10.1039/c0cc01610a

10.1021/nl201823u

10.1016/j.snb.2010.09.003

10.1063/1.1992666

10.1021/nl900772q

10.1016/j.tsf.2007.03.061

1985, Journal of Solid State Chemistry, 56, 269, 10.1016/0022-4596(85)90176-8

10.1063/1.1578694

10.1063/1.3049131

10.1016/j.jphotochem.2010.07.032

10.1016/j.ijhydene.2011.01.004

10.1016/j.ijhydene.2012.05.135

10.1016/j.physb.2011.06.053

10.1016/j.surfcoat.2012.12.001

10.1016/j.matlet.2011.03.070

10.1007/s12274-011-0163-4

1992, Solar Energy Materials and Solar Cells, 27, 347, 10.1016/0927-0248(92)90096-8

10.1016/j.jallcom.2009.04.153

10.1063/1.2345232

10.1021/jp1098816

10.4028/www.scientific.net/AMR.299-300.436

10.1016/j.tsf.2007.05.018

10.1166/sl.2009.1121

10.1007/s10008-011-1635-x

10.1016/j.apsusc.2012.05.021

10.1016/j.ssc.2011.12.008

10.1007/s10853-011-5293-2

10.1016/j.electacta.2012.03.165

10.1016/j.scriptamat.2011.10.037

10.1002/pssb.19660150224

10.1021/cr1002326

2001