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首页> 外文期刊>Journal of materials science >Synthesis and characterization of new 3-alkylthiophene copolymer that exhibit orange-red photoluminescence and electroluminescence
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Synthesis and characterization of new 3-alkylthiophene copolymer that exhibit orange-red photoluminescence and electroluminescence

机译：表现出橙红色光致发光和电致发光的新型3-烷基噻吩共聚物的合成与表征

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摘要

Using copolymerization functionalization, a Novel solution-processable π-conjugated 3-alkylthiophene copolymer (molar ratio of monomer 3-octylthiophene (3OT) and 3-(2-ethyl-1-hexyl) thiophene (3EHT) was 1:1) combining electrochemical properties of poly (3-octylthiophene) (P3OT) and poly (3-isooctylthiophene) (P3EHT) was synthesized by FeCl_3-oxidative approach. Characterization of the polymers included FT-IR, NMR, gel permeation chromatography (GPC), thermo-gravimetric analysis (TGA), UV-Vis spectroscopy photoluminescence (PL) and electroluminescence (EL). P3OTEHT depicted excellent solubility in common organic solvents. The optical properties investigations showed that the band-gap energy of P3OTEHT was similar to P3OT (2.43 eV) at 2.45 eV and 6% lower than that of P3EHT in CHCl_3 solution. The emission maxima of P3OTEHT was 50 nm blue-shifted with respect to that of P3OT. However, the PL intensity of P3OTEHT was seven times higher than that of P3OT in film. The turn-on voltage of LED (ITO/P3OTE-HT/Ag) devices was approaching to P3OT (5.5 V) at 5.6 V and 1.9 V lower than that of P3EHT. The EL color of P3OTEHT was bright pure orange-red (emission λ_(max)~(EL) of 600 nm), meanwhile, the half-wave bandwidth was 70 nm. TGA studies showed that P3OTEHT exhibited very good thermal stabilities, losing 5% of its weight on heating to 300℃. The results indicate that the P3OTEHT with low band-gap energy, low turn-on voltage, high photoluminescence quantum yield pure EL color and processability,rnand might be promising polymer materials for applications in polymer light-emitting diodes, light-emitting electrochemical cells and polymer solar cells, etc.
机译：使用共聚合官能化，结合电化学的新型溶液可处理的π-共轭3-烷基噻吩共聚物（单体3-辛基噻吩（3OT）和3-（2-乙基-1-己基）噻吩（3EHT）的摩尔比为1：1）通过FeCl_3-氧化法合成了聚（3-辛基噻吩）（P3OT）和聚（3-异辛基噻吩）（P3EHT）的性质。聚合物的表征包括FT-IR，NMR，凝胶渗透色谱（GPC），热重分析（TGA），UV-Vis光谱光致发光（PL）和电致发光（EL）。 P3OTEHT表现出在常见有机溶剂中的优异溶解性。光学性能研究表明，在CHCl_3溶液中，P3OTEHT的带隙能与P3OT（2.43 eV）相似，为2.45 eV，比P3EHT低6％。相对于P3OT，P3OTEHT的发射最大值蓝移了50 nm。但是，薄膜中P3OTEHT的PL强度是P3OT的7倍。 LED（ITO / P3OTE-HT / Ag）器件的开启电压比P3EHT低5.6 V和1.9 V，接近P3OT（5.5 V）。 P3OTEHT的EL颜色为明亮的纯橙红色（发射λ_（max）〜（EL）为600 nm），同时半波带宽为70 nm。 TGA研究表明，P3OTEHT具有很好的热稳定性，加热到300℃时其重量减少了5％。结果表明，低带隙能量，低导通电压，高光致发光量子产率的P3OTEHT具有纯正的EL色泽和可加工性，可能成为有前景的聚合物材料，可用于聚合物发光二极管，发光电化学电池和聚合物太阳能电池等

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