Studies of blue organic electroluminescent devices using the polymer/dopant systems as a light-emitting layer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, blue organic light-emitting diodes (OLEDs) using polymer-dopant systems as a light-emitting layer were fabricated. The light-emitting layer was produced via a spin-coating process. The materials used in the light-emitting layer included: poly(9-vinylcarbazole) (PVK) as a matrix material, and blue-emission 4,4′-bis(2,2-diphenylvinyl)biphenyl (DPVBi) as a light-emitting material. The blue OLED was fabricated by blending PVK and DPVBi according to the proportion of mass as specified for a light-emitting layer. Process relevant photophysical mechanisms and energy transfer phenomena were studied using absorption, photoluminescence (PL), photoluminescent excitation, and electroluminescence (EL) spectra. We have learned that there was energy transfer phenomenon between PVK and DPVBi. More specifically, the EL spectrum of PVK:DPVBi was significantly different from the PL spectra of PVK, DPVBi, and PVK:DPVBi, shining to a longer wavelength and showing multiple boarding emission peaks (maximum emission at 465 and 486 nm). The electro-optical characteristics of the blue OLED and the possible origin of the difference between the EL and PL spectra were discussed.

Original languageEnglish
Title of host publicationOrganic Light Emitting Materials and Devices XI
DOIs
Publication statusPublished - 2007 Dec 1
EventOrganic Light Emitting Materials and Devices XI - San Diego, CA, United States
Duration: 2007 Aug 262007 Aug 29

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6655
ISSN (Print)0277-786X

Other

OtherOrganic Light Emitting Materials and Devices XI
CountryUnited States
CitySan Diego, CA
Period07-08-2607-08-29

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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