TY - JOUR
T1 - Role of chlorine in In2S3 for band alignment at nanoporous-TiO2/In2S3 interfaces
AU - Owino Juma, Albert
AU - Azarpira, Anahita
AU - Steigert, Alexander
AU - Pomaska, Manuel
AU - Fischer, Christian Herbert
AU - Lauermann, Iver
AU - Dittrich, Thomas
PY - 2013/8/7
Y1 - 2013/8/7
N2 - Coatings of Cl-free and Cl-containing In2S3 (In 2S3:Cl) layers were prepared by spray ion layer gas reaction on nanoporous TiO2 (np-TiO2). Charge separation in FTO/np-TiO2/In2S3:Cl, FTO/In 2S3:Cl, FTO/np-TiO2/In2S 3:acac, and FTO/In2S3:acac systems has been investigated by modulated surface photovoltage spectroscopy (SPV). The exponential defect tails below the band gap of In2S3 were reduced for In2S3:Cl. The analysis of the SPV spectra allowed to distinguish different mechanisms of charge separation and to deduce the conduction band offsets (about 0.3 eV and 0.05 eV for np-TiO 2/In2S3:Cl and np-TiO2/In 2S3:acac, respectively) in correlation with photoelectron measurements.
AB - Coatings of Cl-free and Cl-containing In2S3 (In 2S3:Cl) layers were prepared by spray ion layer gas reaction on nanoporous TiO2 (np-TiO2). Charge separation in FTO/np-TiO2/In2S3:Cl, FTO/In 2S3:Cl, FTO/np-TiO2/In2S 3:acac, and FTO/In2S3:acac systems has been investigated by modulated surface photovoltage spectroscopy (SPV). The exponential defect tails below the band gap of In2S3 were reduced for In2S3:Cl. The analysis of the SPV spectra allowed to distinguish different mechanisms of charge separation and to deduce the conduction band offsets (about 0.3 eV and 0.05 eV for np-TiO 2/In2S3:Cl and np-TiO2/In 2S3:acac, respectively) in correlation with photoelectron measurements.
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U2 - 10.1063/1.4817766
DO - 10.1063/1.4817766
M3 - Article
AN - SCOPUS:84882256966
SN - 0021-8979
VL - 114
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 5
M1 - 053711
ER -