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An orange-light-emitting cationic iridium(III) complex containing a carbazole-oxadiazole bipolar unit: synthesis and application for Y3Al5O12:Ce3+-based neutral/warm white LEDs

M. F. ZHANG1, Y. C. YE2, Y. Q. WEI1,* , H. J. TANG2,*

Affiliation

  1. Institute of Carbon Neutral New Energy Research, Yuzhang Normal University, Nanchang 330031, P. R. China
  2. Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Che

Abstract

A novel orange-light-emitting cationic iridium(III) complex [(ppy)2Ir(CPO)]PF6 (ppy: 2-phenylpyridine, CPO: 2-(4-(3,6-di-tert-butyl-9H-carbazol-9-yl)phenyl)-5-(pyridin-2-yl)-1,3,4-oxadiazole) containing a bipolar carbazole-oxadiazole unit was synthesized. Its thermal decomposition temperature (Td) was 320 °C, and at 100 °C, its photoluminescence (PL) emission intensity was 73.6 % of that at 20 °C. Under the excitation of the GaN-based blue light chips (λem, max = 455 nm), the complex was successfully used as phosphors and a red-light component provider in Y3Al5O12:Ce3+-based white LEDs for converting cold white light into high-quality neutral and warm white light..

Keywords

Cationic iridium(III) complex, White light-emitting diode, Photoluminescence, LED,.

Submitted at: Dec. 17, 2023
Accepted at: July 30, 2024

Citation

M. F. ZHANG, Y. C. YE, Y. Q. WEI, H. J. TANG, An orange-light-emitting cationic iridium(III) complex containing a carbazole-oxadiazole bipolar unit: synthesis and application for Y3Al5O12:Ce3+-based neutral/warm white LEDs, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 7-8, pp. 269-277 (2024)