The effect of DCJTB concentration on the photoluminescent and electroluminescent properties of PVK-PBD-perylene-DCJTB thin films

Chi Chin Yap, Muhammad Yahaya, Muhamad Mat Salleh

Research output: Contribution to journalArticle

Abstract

The paper reports a study of photoluminescent (PL) and electroluminescent (EL) properties of PVK-PBD-perylene-DCJTB thin film with variation of DCJTB doping concentrations. Poly(9-vinylcarbazole) (PVK) functioned as polymeric hole-transporting host, 2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole (PBD) as electron-transporting molecule, perylene as blue dopant, and 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) as a red dopant. The relative intensity of the blue emission from perylene decreased and that of the red emission from DCJTB increased with the increase of DCJTB concentration in both PL and EL spectra. However, the EL spectrum showed stronger DCJTB emission compared to the PL spectrum at the same DCJTB doping concentration, due to the carrier trapping effect. Interestingly, white light emission with C.I.E. coordinates of (0.31, 0.36) was observed in the EL spectrum when 0.05 wt. % of DCJTB was doped into PVK-PBD-perylene blend film. As a result, PVK-PBD-perylene-DCJTB thin film has potential application in white organic light emitting diodes.

Original languageEnglish
Pages (from-to)209-218
Number of pages10
JournalMaterials Science- Poland
Volume27
Issue number1
Publication statusPublished - 2009

Fingerprint

Perylene
Doping (additives)
Thin films
thin films
Light emission
Organic light emitting diodes (OLED)
Pyrans
light emission
light emitting diodes
trapping
Molecules
Electrons
molecules
electrons

Keywords

  • DCJTB
  • Electroluminescence
  • OLED
  • Perylene
  • Photoluminescence

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

The effect of DCJTB concentration on the photoluminescent and electroluminescent properties of PVK-PBD-perylene-DCJTB thin films. / Yap, Chi Chin; Yahaya, Muhammad; Mat Salleh, Muhamad.

In: Materials Science- Poland, Vol. 27, No. 1, 2009, p. 209-218.

Research output: Contribution to journalArticle

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