TY - JOUR
T1 - Synthesis of fluorene-based polyelectrolytes tethering different counterions for single-component white light-emitting electrochemical cells
AU - Yang, Sheng-Hsiung
AU - Tsai, Chia Sheng
AU - Liu, Bo Cun
AU - Su, Hai-Ching
PY - 2013
Y1 - 2013
N2 - A series of polyfluorene (PF) electrolytes bearing Br-, BF 4-, or PF6- counterions were synthesized and characterized. 2,1,3-benzoselenadiazole moieties were incorporated into polymer main chains to produce single-component white lightemitting polymers. The thermal stability of Br-containing ionic PF was decreased because of the Hofmann elimination occurred at higher temperature. By replacing Br- with BF4- or PF6 - counterions, the thermal stability of polymers was significantly improved. The emission intensity around 550 nm was decreased for ionic polyelectrolytes. The optimized spin-coated light-emitting electrochemical cell (LEC) with the configuration of ITO/PEDOT/polymer/Ag showed a maximum luminescence efficiency of 1.56 lm/W at a low operation bias of 3 V. The single-component LEC device exhibited pure white light emission with CIE'1931 coordinates approaching (0.33, 0.33) and high color rendering index (CRI > 85), referring to its potential use in solid-state-lighting application.
AB - A series of polyfluorene (PF) electrolytes bearing Br-, BF 4-, or PF6- counterions were synthesized and characterized. 2,1,3-benzoselenadiazole moieties were incorporated into polymer main chains to produce single-component white lightemitting polymers. The thermal stability of Br-containing ionic PF was decreased because of the Hofmann elimination occurred at higher temperature. By replacing Br- with BF4- or PF6 - counterions, the thermal stability of polymers was significantly improved. The emission intensity around 550 nm was decreased for ionic polyelectrolytes. The optimized spin-coated light-emitting electrochemical cell (LEC) with the configuration of ITO/PEDOT/polymer/Ag showed a maximum luminescence efficiency of 1.56 lm/W at a low operation bias of 3 V. The single-component LEC device exhibited pure white light emission with CIE'1931 coordinates approaching (0.33, 0.33) and high color rendering index (CRI > 85), referring to its potential use in solid-state-lighting application.
KW - Counterions
KW - Light-emitting electrochemical cells
KW - Polyelectrolytes
KW - Solid-state lighting
UR - http://www.scopus.com/inward/record.url?scp=84889066187&partnerID=8YFLogxK
U2 - 10.1117/12.2022853
DO - 10.1117/12.2022853
M3 - Conference article
AN - SCOPUS:84889066187
SN - 0277-786X
VL - 8829
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
M1 - 88291U
T2 - Organic Light Emitting Materials and Devices XVII
Y2 - 25 August 2013 through 28 August 2013
ER -