Efficient multilayer red fluorescent polymer light-emitting diodes by host and guest blend system

Wun Shing Syu, Sheng Chia Lin, Shin Rong Tseng, Chun Yu Chen, Chang Yao Liu, Yu Chiang Chao, Hsin Fei Meng, Sheng Fu Horng

Research output: Contribution to journalArticle

1 Citation (Scopus)


Efficient red light polymer light-emitting diodes are obtained by energy transfer from host and guest blend system. Two kinds of blend systems, SPB02:(10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H,11H-[1] benzopyrano [6,7,8-ij]quinolizin-11-one)(C545T):4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) and SuperYellow (SY):poly(3,3′′′-didodecylquaterthiophene) (PQT-12), are used as the active layers. C545T is a green emitter, acting as an assistant dopant to improve the energy transfer from blue SPB02 host to red DCJTB. The efficiency can achieve to 3.3 cd/A for DCJTB and 3.5 cd/A for PQT-12 system by multilayer device structure with 2,2,2′′-(1,3,5-phenylene)-tris(1-phenyl-1H-benzimidazole) (TPBi) as electron transport layer. The SuperYellow:PQT-12 device shows great luminance of 16,930 cd/m2.

Original languageEnglish
Pages (from-to)871-875
Number of pages5
JournalSynthetic Metals
Issue number9-10
Publication statusPublished - 2010 May 1



  • Blade coating
  • Blend
  • Host and guest
  • Multilayer
  • Polymer light-emitting diodes
  • Red light

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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