Interfacial electronic structure of C60/ZnPc/AZO on photoemission spectroscopy for organic photovoltaic applications

Nari Heo, Yoonsu Kim, Yunwoo Jung, Suyoung Cheon, Soohaeng Cho, Sangwan Cho, Soohyung Park, Yeonjin Yi, Kevin E. Smith

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The interfacial electronic structure of a bilayer of fullerene (C60) and zinc phthalocyanine (ZnPc) grown on aluminum-doped zinc oxide (AZO) substrates has been evaluated by X-ray and ultraviolet photoemission spectroscopy. The energy difference between the highest occupied molecular orbital (HOMO) level of the ZnPc layer and the lowest unoccupied molecular orbital (LUMO) level of the C60 layer (ED HOMO − EA LUMO) was determined and compared to that grown on an indium tin oxide (ITO) substrate. The ED HOMO − EA LUMO value of the heterojunction on AZO was 1.4 eV, while that on ITO was 1.1 eV. This result is discussed in terms of the differences of the work function and resistivity of each transparent conductive oxide. We also obtained complete energy level diagrams of C60/ZnPc/AZO and C60/ZnPc/ITO.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalChemical Physics
Volume478
DOIs
Publication statusPublished - 2016 Oct 20

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Zinc Oxide
Molecular orbitals
Photoelectron spectroscopy
Aluminum
zinc oxides
Electronic structure
molecular orbitals
photoelectric emission
zinc
indium oxides
tin oxides
electronic structure
aluminum
spectroscopy
Substrates
Ultraviolet spectroscopy
Oxides
Electron energy levels
fullerenes
Heterojunctions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Heo, Nari ; Kim, Yoonsu ; Jung, Yunwoo ; Cheon, Suyoung ; Cho, Soohaeng ; Cho, Sangwan ; Park, Soohyung ; Yi, Yeonjin ; Smith, Kevin E. / Interfacial electronic structure of C60/ZnPc/AZO on photoemission spectroscopy for organic photovoltaic applications. In: Chemical Physics. 2016 ; Vol. 478. pp. 145-149.
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abstract = "The interfacial electronic structure of a bilayer of fullerene (C60) and zinc phthalocyanine (ZnPc) grown on aluminum-doped zinc oxide (AZO) substrates has been evaluated by X-ray and ultraviolet photoemission spectroscopy. The energy difference between the highest occupied molecular orbital (HOMO) level of the ZnPc layer and the lowest unoccupied molecular orbital (LUMO) level of the C60 layer (ED HOMO − EA LUMO) was determined and compared to that grown on an indium tin oxide (ITO) substrate. The ED HOMO − EA LUMO value of the heterojunction on AZO was 1.4 eV, while that on ITO was 1.1 eV. This result is discussed in terms of the differences of the work function and resistivity of each transparent conductive oxide. We also obtained complete energy level diagrams of C60/ZnPc/AZO and C60/ZnPc/ITO.",
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Interfacial electronic structure of C60/ZnPc/AZO on photoemission spectroscopy for organic photovoltaic applications. / Heo, Nari; Kim, Yoonsu; Jung, Yunwoo; Cheon, Suyoung; Cho, Soohaeng; Cho, Sangwan; Park, Soohyung; Yi, Yeonjin; Smith, Kevin E.

In: Chemical Physics, Vol. 478, 20.10.2016, p. 145-149.

Research output: Contribution to journalArticle

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T1 - Interfacial electronic structure of C60/ZnPc/AZO on photoemission spectroscopy for organic photovoltaic applications

AU - Heo, Nari

AU - Kim, Yoonsu

AU - Jung, Yunwoo

AU - Cheon, Suyoung

AU - Cho, Soohaeng

AU - Cho, Sangwan

AU - Park, Soohyung

AU - Yi, Yeonjin

AU - Smith, Kevin E.

PY - 2016/10/20

Y1 - 2016/10/20

N2 - The interfacial electronic structure of a bilayer of fullerene (C60) and zinc phthalocyanine (ZnPc) grown on aluminum-doped zinc oxide (AZO) substrates has been evaluated by X-ray and ultraviolet photoemission spectroscopy. The energy difference between the highest occupied molecular orbital (HOMO) level of the ZnPc layer and the lowest unoccupied molecular orbital (LUMO) level of the C60 layer (ED HOMO − EA LUMO) was determined and compared to that grown on an indium tin oxide (ITO) substrate. The ED HOMO − EA LUMO value of the heterojunction on AZO was 1.4 eV, while that on ITO was 1.1 eV. This result is discussed in terms of the differences of the work function and resistivity of each transparent conductive oxide. We also obtained complete energy level diagrams of C60/ZnPc/AZO and C60/ZnPc/ITO.

AB - The interfacial electronic structure of a bilayer of fullerene (C60) and zinc phthalocyanine (ZnPc) grown on aluminum-doped zinc oxide (AZO) substrates has been evaluated by X-ray and ultraviolet photoemission spectroscopy. The energy difference between the highest occupied molecular orbital (HOMO) level of the ZnPc layer and the lowest unoccupied molecular orbital (LUMO) level of the C60 layer (ED HOMO − EA LUMO) was determined and compared to that grown on an indium tin oxide (ITO) substrate. The ED HOMO − EA LUMO value of the heterojunction on AZO was 1.4 eV, while that on ITO was 1.1 eV. This result is discussed in terms of the differences of the work function and resistivity of each transparent conductive oxide. We also obtained complete energy level diagrams of C60/ZnPc/AZO and C60/ZnPc/ITO.

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