Interaction between organic semiconductors and LiF dopant
- Department of Materials Science and Engineering, University of Toronto, Toronto, Ontario M5S 3E4 (Canada)
X-ray photoemission spectroscopy and optical absorption have been used to study the interaction between LiF dopant and various organic semiconductor hosts including N,N{sup '}-diphenyl-N,N{sup '}-bis (3-methylphenyl)-1, 1{sup '}-biphenyl-4, 4{sup '}-diamine (TPD), N,N{sup '}-bis (1-naphthyl)-N,N{sup '}-diphenyl-1, 1{sup '}-biphenyl-4, 4{sup '}-diamine (NPB), tris (8-hydroxyquinolinato) aluminum (Alq3), C{sub 60}, and copper phthalacyanine (CuPc). It was found that there is a charge transfer between host and dopant in the Alq3-LiF and C{sub 60}-LiF systems, while no such charge transfer was observed for the TPD-LiF, NPB-LiF, and CuPc-LiF systems. The experimental data show that F{sup -} anion acts as an n-type donor-donating electron charge to the electron transport molecules.
- OSTI ID:
- 20634458
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 85; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
ABSORPTION
ALUMINIUM
ALUMINIUM COMPOUNDS
ANIONS
BIPHENYL
CHARGE EXCHANGE
COPPER
COPPER COMPOUNDS
ELECTRONS
EXPERIMENTAL DATA
FLUORINE IONS
FULLERENES
INFRARED SPECTRA
LITHIUM FLUORIDES
ORGANIC SEMICONDUCTORS
PHOTOEMISSION
THIN FILMS
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
X-RAY PHOTOELECTRON SPECTROSCOPY