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Title: Electronic Structure of ClAlPc/pentacene/ITO Interfaces Studied by Using Soft X-ray Spectroscopy

The interfacial electronic structure of a bilayer of chloroaluminum phthalocyanine (ClAlPc) and pentacene grown on indium tin oxide (ITO) has been studied using synchrotron-radiation-excited photoelectron spectroscopy. The energy difference between the highest occupied molecular orbital (HOMO) level of the pentacene layer and the lowest unoccupied molecular orbital (LUMO) level of the ClAlPc layer (E HOMO D - E LUMO A ) was determined and compared with that of C 60/pentacene bilayers. The E HOMO D - E LUMO A of a heterojunction with ClAlPc was found to be 1.3 eV while that with C 60 was 0.9 eV. This difference is discussed in terms of the difference in the ionization energy of each acceptor materials. We also obtained the complete energy level diagrams of both ClAlPc/pentacene/ITO and C 60/pentacene/ITO.
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Yonsei Univ., Wonju (Korea)
  2. Boston Univ., MA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0374-4884
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Korean Physical Society; Journal Volume: 65; Journal Issue: 10
Korean Physical Society
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
59 BASIC BIOLOGICAL SCIENCES; CIAIPc; pentacene; photoemission; organic solar cells