Investigation of organic-organic interfaces by time-resolved photocurrent, electrochemical, and photoemission techniques
Hole transporting properties and energy barriers at organic-organic interfaces relevant to electrophotographic and organic electroluminescent (EL) devices are described. Three well-known hole transporting molecules, 1,1-bis(di-4-tolylaminophenyl)cyclohexane (TAPC), N,N{prime}-diphenyl-N,N{prime}-bis(1-naphthyl)-(1,1{prime}-biphenyl)-4,4{prime}-diamine (NPB), and N,N,N{prime},N{prime}-tetrakis(4-tolyl)-(1,1{prime}-biphenyl)-4,4{prime}-diamine (TTB) are used in this study. The ionization potentials (IP) and oxidation potentials (E{sub ox}) of these materials are determined by photoemission spectroscopy and electrochemical measurements, from which a conversion formula is obtained (IP {approximately} 4.5 eV + eE{sub ox}). Hole transport across organic-organic interfaces is investigated by time-of-flight transient photocurrent techniques. The efficiencies of hole injection are consistent with the energy barriers, when present, at these interfaces.
- Research Organization:
- Univ. of Rochester, NY (US)
- Sponsoring Organization:
- National Science Foundation (NSF)
- OSTI ID:
- 20034141
- Resource Relation:
- Conference: Electrical, Optical, and Magnetic Properties of Organic Solid-State Materials IV, Boston, MA, (US), 12/01/1997--12/05/1997; Other Information: PBD: 1998; Related Information: In: Electrical, optical, and magnetic properties of organic solid-state materials IV. Materials Research Society, symposium proceedings Volume 488, by Reynolds, J.R.; Jen, A.K.Y.; Rubner, M.F.; Chiang, L.Y.; Dalton, L.R. [eds.], 977 pages.
- Country of Publication:
- United States
- Language:
- English
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