Synthesis and characterization of thermally cross-linkable trimer based on triphenylamine

被引：11

作者：

Hong, Heeseob ^{[1
]}

Jo, Mi Young ^{[1
]}

Ha, Ye Eun ^{[1
]}

Kim, Joo Hyun ^{[1
]}

机构：

[1] Pukyong Natl Univ, Dept Polymer Engn, Pusan 608739, South Korea

来源：

MACROMOLECULAR RESEARCH | 2013年 / 21卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

in situ thermal curing; oligotriphenylamine; buffer layer; hole injection/transporting material; LIGHT-EMITTING-DIODES; HOLE-TRANSPORTING MATERIALS; FIELD-EFFECT TRANSISTOR; BAND-GAP POLYMER; CONJUGATED POLYMERS; SOLAR-CELL; DEVICES; MOBILITY; POLY(3-HEXYLTHIOPHENE); BLENDS;

D O I：

10.1007/s13233-013-1116-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A trimer with thermally crosslinkable vinyl groups, (4-butyl-phenyl)-bis-[4-((4-vinyl-phenyl)-(4-butyl-phenyl)-phenyl-amine)-phenyl]-amine (3-TPA), was synthesized successfully. Differential scanning calorimetry (DSC) thermogram of 3-TPA showed two endothermic processes at 122 and 218 A degrees C at the first heating scan. The endothermic peak at 122 A degrees C corresponds to the melting behavior of 3-TPA and the other at 218 A degrees C seems to be from thermal crosslinking. Thermally cured 3-TPA film at 180 A degrees C for 1 h showed very good solvent resistance and was electrochemically stable. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of cured 3-TPA film was -5.09 and -2.10 eV, respectively. The turn on electric field of PLEDs with cured 3-TPA was 1.37-1.80 MV/cm, which was smaller than that of the device without 3-TPA (2.51 MV/cm). The luminance efficiency and brightness of polymer light-emitting diodes (PLEDs) based on 3-TPA were much higher than that of the PLED without 3-TPA. This is due to that cured 3-TPA has hole injection and transporting property. Among the PLEDs, the device with a 20 nm-thick cured 3-TPA showed the best performance with a maximum efficiency of 1.29 cd/A and a maximum brightnes of 2,500 cd/m(2).

引用

页码：321 / 326

页数：6

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