4.6 Article

Solution-processable iridium phosphors for efficient red and white organic light-emitting diodes with low roll-off

期刊

JOURNAL OF MATERIALS CHEMISTRY C
卷 4, 期 6, 页码 1250-1256

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc03793j

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资金

  1. Natural Science Foundation of China [61307036, 61177016]
  2. Natural Science Foundation of Jiangsu Province [BK20130288]
  3. Collaborative Innovation Center of Suzhou Nano Science and Technology
  4. Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

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A new red phosphorescent material Ir(dmppm)(2)(dmd), which is a pyrimidine-based iridium(III) complex, has been synthesized and successfully used to fabricate solution-processed red and white organic light-emitting diodes (OLEDs). Due to its excellent solubility in common organic solvents and its good compatibility with the host material, a record current efficiency of 27.2 cd A(-1) so far with satisfactory Commission International de l'Eclairage (CIE) coordinates of (0.60, 0.40) has been achieved for partially solution-processed red OLEDs by using Ir(dmppm)(2)(dmd) as a dopant. Furthermore, the fabricated two-component warm-white'' OLEDs based on the Ir(dmppm)(2)(dmd) red emitter demonstrate a maximum current efficiency of 28.9 cd A(-1), which can meet the call for physiologically-friendly indoor illumination.

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