TY - JOUR
T1 - Synthesis and optoelectronic properties of luminescent copolyfluorenes slightly doped with thiophene chromophore
AU - Su, Wen Fen
AU - Chen, Tsui Ting
AU - Chen, Yun
N1 - Funding Information:
The authors thank the National Science Council of Taiwan for the financial aid through project NSC 98-2221-E-006-002-MY3 .
PY - 2010/3/24
Y1 - 2010/3/24
N2 - This paper describes the synthesis of new copolyfluorenes (P05-P5) slightly doped with 2,5-bis(2-phenyl-2-cyanovinyl)thiophene (GM, <3.4 mol%) and their application in electroluminescent (EL) devices. In film state, EL spectra of the copolyfluorenes are very different from photoluminescence (PL) spectra, which have been ascribed to charge trapping in GM and energy transfer from fluorene segments to GM chromophores. The maximum brightness and current efficiency of EL device from P05 (5230 cd/m2, 0.65 cd/A) are significantly enhanced when compared with those from poly(9,9-dihexylfluorene) (PF) (1310 cd/m2, 0.18 cd/A). The EL device using blend of P5 and PF (w/w = 10/1) as emitting layer exhibits near-white emission with CIE coordinate being (0.26, 0.32). The results demonstrate that the copolyfluorenes slightly doped with GM chromophore are promising emitting materials for optoelectronic devices.
AB - This paper describes the synthesis of new copolyfluorenes (P05-P5) slightly doped with 2,5-bis(2-phenyl-2-cyanovinyl)thiophene (GM, <3.4 mol%) and their application in electroluminescent (EL) devices. In film state, EL spectra of the copolyfluorenes are very different from photoluminescence (PL) spectra, which have been ascribed to charge trapping in GM and energy transfer from fluorene segments to GM chromophores. The maximum brightness and current efficiency of EL device from P05 (5230 cd/m2, 0.65 cd/A) are significantly enhanced when compared with those from poly(9,9-dihexylfluorene) (PF) (1310 cd/m2, 0.18 cd/A). The EL device using blend of P5 and PF (w/w = 10/1) as emitting layer exhibits near-white emission with CIE coordinate being (0.26, 0.32). The results demonstrate that the copolyfluorenes slightly doped with GM chromophore are promising emitting materials for optoelectronic devices.
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U2 - 10.1016/j.polymer.2010.02.012
DO - 10.1016/j.polymer.2010.02.012
M3 - Article
AN - SCOPUS:77949261525
VL - 51
SP - 1555
EP - 1562
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 7
ER -