Enhanced Photoelectrochemical Solar Water Splitting Using a Platinum-Decorated CIGS/CdS/ZnO Photocathode.
A Cu(InGa)Se2 film was modified with CdS/ZnO for application to solar water splitting. Platinum was electrodeposited on the ZnO layer as a hydrogen evolution catalyst. The effects of the electroplating time and acidity level of the electrolyte on the photocurrent density were studied. The highest photocurrent density of -32.5 mA/cm(2) under 1.5 AM illumination was achieved with an electroplating time of 30 min at a pH of 9. This photocurrent density is higher than those reported in previous studies. The markedly high performance of the CIGS/CdS/ZnO photocathode was rationalized in terms of its type II cascade structure that facilitated efficient charge separation at the interface junction.
School of Mechanical Engineering, Korea University, Seoul 136-713, Republic of Korea.
Mukund G
MG
Mali
School of Mechanical Engineering, Korea University, Seoul 136-713, Republic of Korea.
Hyun
H
Yoon
School of Mechanical Engineering, Korea University, Seoul 136-713, Republic of Korea.
Bhavana N
BN
Joshi
School of Energy Engineering, Kyungpook National University , Daegu 702-701, Republic of Korea.
Hyunwoong
H
Park
Petrochemicals Research Chair, Department of Chemistry, King Saud University , Riyadh 11451, Saudi Arabia.
Salem S
SS
Al-Deyab
Surface Technology Division, Korea Institute of Materials Science , Changwon 641-010, Republic of Korea.
Dong Chan
DC
Lim
Photovoltaic Laboratory, Korea Institute of Energy Research , 71-2 Jangdong, YuseongGu, DaeJeon 305-543, Republic of Korea.
SeJin
S
Ahn
Department of Chemistry and NIS, University of Torino , Via P. Giuria 7, 10125 Torino, Italy.|Interuniversity Consortium of Chemical Reactivity and Catalyis, University of Bari , 70126 Bari, Italy.
Carlo
C
Nervi
School of Mechanical Engineering, Korea University, Seoul 136-713, Republic of Korea.
Sam S
SS
Yoon
CIGS/CdS; photocurrent; platinum; p−n junction; water splitting