Synthesis and luminescent properties of a new class of nematic oxadiazole containing poly-ethers for PLED

Domenico Acierno, Eugenio Amendola, Salvatore Bellone, Simona Concilio, Luigi Ferrara, Pio Iannelli, Heinz-Christoph Neitzert, Alfredo Rubino, Fulvia Villani

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Abstract

We report on thin films based on a new type of nematic oxadiazole containing polymer for application in blue light emitting diodes. In particular, our focus will be on the thickness and temperature dependence of the optical characteristics. A simple optical characterization setup, based on an GaN UV-LED as excitation source and a fiber-coupled spectrometer, has been used to determine the photoluminescence spectrum and peak intensity in the blue wavelength range and the UV-reflection intensity. The measured values of the photoluminescence intensity increase, while those of the UV-reflection intensity decrease strongly with increasing the thickness of the polymer film. This may enable one to use the ratio of both values after appropriate calibration as a valid tool for small variations of the film thickness. We find only a moderate decrease in photoluminescence intensity with increasing the film temperature from 25 to 60 °C. © 2004 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)278 - 282
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume338-340
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 15 Jun 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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