Effect of End Groups on Optoelectronic Properties of Poly(9,9-dioctylfluorene): A Study with Hexadecylfluorenes as Model Polymers

	Effect of End Groups on Optoelectronic Properties of Poly(9,9-dioctylfluorene): A Study with Hexadecylfluorenes as Model Polymers
	Wang QL ; Zhang BH ; Liu LH ; Chen YG ; Qu Y ; Zhang XJ ; Yang JW ; Xie ZY ; Geng YH ; Wang LX ; Wang FS
刊名	journal of physical chemistry c
	2012
卷号	116 期号:41 页码:21727-21733
关键词	LIGHT-EMITTING-DIODES ORGANIC SOLAR-CELLS CONJUGATED POLYMERS MOLECULAR-WEIGHT HOLE TRANSPORT GREEN EMISSION POLYFLUORENE EFFICIENCY DEFECTS BLUE
ISSN号	1932-7447
通讯作者	xie zy
中文摘要	monodisperse hexadecyl(9,9-dioctylfluorene)s f16, brf16, and bf16, which comprise h, br, and boronic pinacol ester end groups, respectively, were synthesized, and the effect of these end groups on the photophysical, electrochemical, and electroluminescent properties of the polymers were investigated. the end groups have no noticeable effect on the energy levels of the polymers. f16 and brf16 show high photoluminescence (pl) quantum yields (phi s) in both solution and film states. film pl phi s (phi(film)s) of f16 and brf16 are 0.72 and 0.79, respectively. these values are about 1.4-1.5 times of that of bf16 and poly(9,9-dioctylfluorene) (pfo) prepared by suzuki polycondensation. moreover, phi(film)s of f16 and brf16 were kept almost the same after thermal annealing at 120 degrees c in both air and argon atmospheres. by contrast, the phi(film)s of bf16 and pfo dramatically decreased to 0.25 and 0.2.9 after thermal annealing at 120 degrees c in air. polymer light-emitting diodes (pleds) were fabricated. f16, brf16, and pfo exhibited maximum luminance efficiencies of 0.60, 0.27, and 0.39 cd.a(-1), respectively; while that of bf16 was as low as 0.024 cd.a(-1). meanwhile, green emission was observed for devices of brf16, bf16, and pfo, but not for devices of f16. electron- and hole-only devices were fabricated for elucidating the effect of end groups on charge transporting properties of the polymers. while br is a mild hole-trapper, boronic ester group traps both holes and electrons, resulting in severely unbalanced hole- and electron-transport. our results indicate that boronic ester end groups have a detrimental effect on the optoelectronic properties of polyfluorenes larger than br.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000309902100011
公开日期	2013-04-22
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/47892]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wang QL,Zhang BH,Liu LH,et al. Effect of End Groups on Optoelectronic Properties of Poly(9,9-dioctylfluorene): A Study with Hexadecylfluorenes as Model Polymers[J]. journal of physical chemistry c,2012,116(41):21727-21733.
APA	Wang QL.,Zhang BH.,Liu LH.,Chen YG.,Qu Y.,...&Wang FS.(2012).Effect of End Groups on Optoelectronic Properties of Poly(9,9-dioctylfluorene): A Study with Hexadecylfluorenes as Model Polymers.journal of physical chemistry c,116(41),21727-21733.
MLA	Wang QL,et al."Effect of End Groups on Optoelectronic Properties of Poly(9,9-dioctylfluorene): A Study with Hexadecylfluorenes as Model Polymers".journal of physical chemistry c 116.41(2012):21727-21733.