skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Soft X-ray Spectroscopy of C60/Copper Phthalocyanine/MoO3 Interfaces: Role of Reduced MoO3 on Energetic Band Alignment and Improved Performance

Abstract

The interfacial electronic structure of C{sub 60}/copper phthalocyanine (CuPc)/molybdenum trioxide (MoO{sub 3}) thin films grown in situ on indium tin oxide (ITO) substrates has been studied using synchrotron radiation-excited photoelectron spectroscopy in an attempt to understand the influence of oxide interlayers on the performance of small molecule organic photovoltaic devices. The MoO{sub 3} layer on ITO is found to significantly increase the work function of the substrate and induces large interface dipoles and band bending at the CuPc/MoO{sub 3} interface. The large band bending confirms the formation of an internal potential that assists hole extraction from the CuPc layer to the electrode. The electronic structure of the MoO{sub 3} layer on ITO was also examined using various soft X-ray spectroscopies to probe the conductive nature of the MoO{sub 3} thin film.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1042232
Report Number(s):
BNL-97910-2012-JA
Journal ID: ISSN 1932-7447; TRN: US201212%%643
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry C
Additional Journal Information:
Journal Volume: 114; Journal Issue: 42; Journal ID: ISSN 1932-7447
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALIGNMENT; BENDING; DIPOLES; ELECTRONIC STRUCTURE; INDIUM; OXIDES; PERFORMANCE; PHOTOELECTRON SPECTROSCOPY; PHTHALOCYANINES; PROBES; SUBSTRATES; SYNCHROTRONS; THIN FILMS; TIN OXIDES; WORK FUNCTIONS; X-RAY SPECTROSCOPY

Citation Formats

Cho, S, Piper, L, DeMasi, A, Preston, A, Smith, K, Chauhan, K, Hatton, R, and Jones, T. Soft X-ray Spectroscopy of C60/Copper Phthalocyanine/MoO3 Interfaces: Role of Reduced MoO3 on Energetic Band Alignment and Improved Performance. United States: N. p., 2011. Web.
Cho, S, Piper, L, DeMasi, A, Preston, A, Smith, K, Chauhan, K, Hatton, R, & Jones, T. Soft X-ray Spectroscopy of C60/Copper Phthalocyanine/MoO3 Interfaces: Role of Reduced MoO3 on Energetic Band Alignment and Improved Performance. United States.
Cho, S, Piper, L, DeMasi, A, Preston, A, Smith, K, Chauhan, K, Hatton, R, and Jones, T. Sat . "Soft X-ray Spectroscopy of C60/Copper Phthalocyanine/MoO3 Interfaces: Role of Reduced MoO3 on Energetic Band Alignment and Improved Performance". United States.
@article{osti_1042232,
title = {Soft X-ray Spectroscopy of C60/Copper Phthalocyanine/MoO3 Interfaces: Role of Reduced MoO3 on Energetic Band Alignment and Improved Performance},
author = {Cho, S and Piper, L and DeMasi, A and Preston, A and Smith, K and Chauhan, K and Hatton, R and Jones, T},
abstractNote = {The interfacial electronic structure of C{sub 60}/copper phthalocyanine (CuPc)/molybdenum trioxide (MoO{sub 3}) thin films grown in situ on indium tin oxide (ITO) substrates has been studied using synchrotron radiation-excited photoelectron spectroscopy in an attempt to understand the influence of oxide interlayers on the performance of small molecule organic photovoltaic devices. The MoO{sub 3} layer on ITO is found to significantly increase the work function of the substrate and induces large interface dipoles and band bending at the CuPc/MoO{sub 3} interface. The large band bending confirms the formation of an internal potential that assists hole extraction from the CuPc layer to the electrode. The electronic structure of the MoO{sub 3} layer on ITO was also examined using various soft X-ray spectroscopies to probe the conductive nature of the MoO{sub 3} thin film.},
doi = {},
journal = {Journal of Physical Chemistry C},
issn = {1932-7447},
number = 42,
volume = 114,
place = {United States},
year = {2011},
month = {12}
}