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

Authors :
Do, Thu Trang
Matsuki, Keiichiro
Sakanoue, Tomo
Wong, Fu-Lung
Manzhos, Sergei
Lee, Chun-Sing
Bell, John
Takenobu, Taishi
Sonar, Prashant
Do, Thu Trang
Matsuki, Keiichiro
Sakanoue, Tomo
Wong, Fu-Lung
Manzhos, Sergei
Lee, Chun-Sing
Bell, John
Takenobu, Taishi
Sonar, Prashant
Source :
Organic Electronics
Publication Year :
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.

Details

Database :
OAIster
Journal :
Organic Electronics
Notes :
application/pdf
Publication Type :
Electronic Resource
Accession number :
edsoai.on1104090973
Document Type :
Electronic Resource