Role of chlorine in In2S3 for band alignment at nanoporous-TiO2/In2S3 interfaces

Albert Owino Juma; Anahita Azarpira; Alexander Steigert; Manuel Pomaska; Christian Herbert Fischer; Iver Lauermann; Thomas Dittrich

doi:10.1063/1.4817766

Role of chlorine in In₂S₃ for band alignment at nanoporous-TiO₂/In₂S₃ interfaces

Albert Owino Juma
, Anahita Azarpira
, Alexander Steigert
, Manuel Pomaska
, Christian Herbert Fischer
, Iver Lauermann
, Thomas Dittrich

Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

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.

Original language	English
Article number	053711
Journal	Journal of Applied Physics
Volume	114
Issue number	5
DOIs	https://doi.org/10.1063/1.4817766
Publication status	Published - Aug 7 2013

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Physics and Astronomy (miscellaneous)
General Physics and Astronomy

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10.1063/1.4817766

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title = "Role of chlorine in In2S3 for band alignment at nanoporous-TiO2/In2S3 interfaces",

abstract = "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.",

author = "\{Owino Juma\}, Albert and Anahita Azarpira and Alexander Steigert and Manuel Pomaska and Fischer, \{Christian Herbert\} and Iver Lauermann and Thomas Dittrich",

year = "2013",

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doi = "10.1063/1.4817766",

language = "English",

volume = "114",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

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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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DO - 10.1063/1.4817766

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SN - 0021-8979

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 5

M1 - 053711

ER -

Role of chlorine in In₂S₃ for band alignment at nanoporous-TiO₂/In₂S₃ interfaces

Abstract

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