Enhancement of electroplex emission by using multi-layer device structure
Creators
- 1. Key Laboratory for Information Storage, Displays and Materials, Beijing 100044 (China)
- 2. Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044 (China)
- 3. Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044 (China) and Key Laboratory for Information Storage, Displays and Materials, Beijing 100044 (China)
Description
Electroplex emission based on poly(N-vinylcarbazole) (PVK) and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) has been improved dramatically by using a multi-layer device structure indium-tin oxide (ITO)/poly(3,4-ethylenedioxythiophene): poly(styrenesulphonic acid) (PEDOT:PSS)/PVK/BCP/PVK/BCP/LiF/Al. Electroplex emission at 595 nm has been improved about 10 times under low voltage and four times under high voltage compared to the double layer device ITO/PVK/BCP/Al. The maximum brightness of the device also has been improved about eight times. Bright white emission via electroplex formation can be obtained with Commission International d'Eclairage (CIE) coordinates (0.336, 0.320) at 26 V with a brightness of 123 cd/m2. Based on the analysis of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the materials, we suggest the enhancement is mainly ascribed to the confinement effect of the quantum-well-like multi-layer device structure. Every hole and electron has more possibilities to cross recombination at the PVK/BCP interface
Additional details
Identifiers
- DOI
- 10.1016/j.apsusc.2004.09.080;
- PII
- S0169-4332(04)01435-7;
Publishing Information
- Journal Title
- Applied Surface Science
- Journal Volume
- 243
- Journal Issue
- 1-4
- Journal Page Range
- p. 357-361
- ISSN
- 0169-4332
- CODEN
- ASUSEE
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38091986
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BRIGHTNESS; CARBAZOLES; EMISSION; INDIUM OXIDES; INTERFACES; LAYERS; LITHIUM FLUORIDES; MOLECULAR ORBITAL METHOD; QUANTUM WELLS; TIN OXIDES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; AROMATICS; AZAARENES; AZOLES; CALCULATION METHODS; CHALCOGENIDES; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; INDIUM COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM HALIDES; NANOSTRUCTURES; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TIN COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.