Design, synthesis and properties of triple-color hyperbranched polymers derived from poly(9,9-dioctylfluorene) with phosphorescent core tris(1-phenylisoquinoline)iridium

Jing Sun, Hua Wang, Tao Yang, Xinwen Zhang, Jie Li, Tiaomei Zhang, Yuling Wu, Weihua Chen, Wai Yeung Wong, Bingshe Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

A series of triple-color hyperbranched polymers based on poly(9,9-dioctylfluorene) (PF) were designed and synthesized, in which phosphorescent tris(1-phenylisoquinoline)iridium(Cyrillic capital letter sha) (Ir(piq)3) acts as red core and poly[(9,9-dioctylfluorene-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,7-diyl)] (PFBT) is inserted as green-emission segment. The synthesized polymers have good thermostability, film forming ability and high fluorescence quantum yield. By tuning the contents of red core and green-emission segment, the optimized triple-color hyperbranched polymer is acquired, named PF-BT250-Ir(piq)325. Furthermore, the PF-BT250-Ir(piq)325 is utilized as single emission layer in white polymer light emitting diode with the configuration of ITO/PEDOT:PSS (50 nm)/PF-BT250-Ir(piq)325 (80 nm)/TPBI (40 nm)/LiF (1 nm)/Al (100 nm). The diode exhibits a maximum luminous efficiency of 1.60 cd/A, a maximum luminance of 3267 cd/m2and the Commission Internationale de l'Eclairage coordinate of (0.32, 0.34) very close to the pure white point of (0.33, 0.33).
Original languageEnglish
Pages (from-to)339-347
Number of pages9
JournalDyes and Pigments
Volume125
DOIs
Publication statusPublished - 1 Feb 2016
Externally publishedYes

Keywords

  • Electroluminescent properties
  • Hyperbranched structure
  • Phosphorescent Ir(piq) core 3
  • Polyfluorene
  • Triple-color
  • White polymer light emitting diodes (WPLEDs)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

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