Indenofluorene-based-copolymers : Influence of electron-deficient benzothiadiazole (BT) and benzooxadiazole (BO) moieties on light emitting devices

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Thu-Trang Do
  • Keiichiro Matsuki
  • Tomo Sakanoue
  • Fu-Lung Wong
  • Sergei Manzhos
  • John Bell
  • Taishi Takenobu
  • Prashant Sonar

Detail(s)

Original languageEnglish
Pages (from-to)14-24
Journal / PublicationOrganic Electronics: physics, materials, applications
Volume70
Online published30 Mar 2019
Publication statusPublished - Jul 2019

Abstract

Herein, two copolymers, poly [(6,6,12,12-tetraoctylindenofluorene)-co-(2,1,3-benzothiadiazole)] (PIFL-BT) and poly [(6,6,12,12-tetraoctylindenofluorene)-co-(2,1,3- benzooxadiazole)] (PIFL-BO) were synthesized and characterized. The effect of two electron accepting moieties benzothiadiazole (BT) and benzooxadiazole (BO) in combination with common tetraalkyl substituted indenofluorene building block in the backbone of conjugated polymer is studied in detail via thermal, optical, and electrochemical characteristics. To investigate the electroluminescence characteristics, both organic light emitting diodes (OLEDs) and light emitting electrochemical cells (LECs) devices are fabricated using copolymers as an active light-emitting layer. For the OLED devices, only polymer PIFL-BT emitted yellow light with CIE coordinates of (0.43, 0.55), a maximum current efficiency (CEmax ) of 0.24 cd/A, a maximum power efficiency (PEmax ) of 0.11 lm/W and a maximum brightness (MBmax ) of 1398 cd/m2. For the LEC device, both materials showed light emission and higher current density than OLEDs devices, indicating better carrier injection in LECs.

Research Area(s)

  • Benzooxadiazole, Benzothiadiazole, Indenofluorene, Light emitting electrochemical cells (LECs), Organic light-emitting diodes (OLEDs)

Citation Format(s)

Indenofluorene-based-copolymers : Influence of electron-deficient benzothiadiazole (BT) and benzooxadiazole (BO) moieties on light emitting devices. / Do, Thu-Trang; Matsuki, Keiichiro; Sakanoue, Tomo; Wong, Fu-Lung; Manzhos, Sergei; Lee, Chun-Sing; Bell, John; Takenobu, Taishi; Sonar, Prashant.

In: Organic Electronics: physics, materials, applications, Vol. 70, 07.2019, p. 14-24.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review