Photoresponse of poly([ital para]-phenylenevinylene) light-emitting diodes

Journal Article · Wed Jun 15 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.17480· OSTI ID:7045036

Wei, X; Raikh, M; Vardeny, Z V ^[1]; Yang, Y ^[2]; Moses, D ^[3]

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1. Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)
2. UNIAX Corporation, 5375 Overpass Road, Santa Barbara, California 93111 (United States)
3. Institute of Polymers and Organic Solids, University of California, Santa Barbara, California 93106 (United States)

We have studied the photoresponses of poly([ital para]-phenylene vinylene) (PPV) light-emitting diodes (LED's) with PPV derivatives sandwiched between tin oxide (ITO) and metals including calcium, aluminum, and copper. Under illumination all diodes exhibit relatively large photoconductive I(V) responses which cross the dark I(V) curve at a forward-bias voltage V[sub 0] that scales with the difference in work functions between the ITO and metal electrodes, the open-circuit voltage saturates at V[sub 0] and is temperature independent, and the enhanced electroluminescence intensity of the illuminated LED's correlates with the photocurrent. (AIP)

• DOE Contract Number: FG03-93ER12138
• OSTI ID: 7045036
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 49:24; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
PHOTOCONDUCTIVITY
CALCIUM
COPPER
INDIUM OXIDES
LIGHT EMITTING DIODES
ORGANIC SEMICONDUCTORS
PHENYLENE RADICALS
POLYMERS
POLYVINYLS
TIN OXIDES
ELECTROLUMINESCENCE
OPTICAL PROPERTIES
PHOTOVOLTAIC EFFECT
ALKALINE EARTH METALS
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
INDIUM COMPOUNDS
LUMINESCENCE
MATERIALS
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTROMAGNETIC EFFECTS
PHYSICAL PROPERTIES
RADICALS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR MATERIALS
TIN COMPOUNDS
TRANSITION ELEMENTS
360606* - Other Materials- Physical Properties- (1992-)