Ultra-low voltage organic light-emitting diodes based on PiN structures

Jingsong Huang, Martin Pfeiffer, Ansgar Werner, Jan Blochwitz, Karl Leo, Shiyong Liu

Research output: Contribution to journalJournal Articlepeer-review

Abstract

We demonstrate an efficient organic electroluminescent devices with p-i-n structure. An amorphous starburst, 4,4′,4″-tris(3-methylphenylphenylamino)triphenylamine doped with a strong organic acceptor, tetrafluoro-tetracyanoquinodimethane serves as the p-type hole transport layer, and 4,7-diphenyl-1, 10-phenanthroline doped with Li as the n-type electron transport layer. A breakthrough is achived in the performances of device based on pure 8-tris-hydroxyquinoline as an emitter: 100cd/m2 at 2.52V, 1,000cd/m2 at 2.9V and the maximum luminance and efficiency reache 66,000cd/m2 and 5.25 cd/A, respectively. The efficiency can be kept above 3cd/A in a very large luminance region from 100 to 55,000cd/m2.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4642
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Controlled doping
  • Low operating voltage
  • Organic electroluminescence

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