Effect of 3D π-π Stacking on Photovoltaic and Electroluminescent Properties in Triphenylamine-containing Poly(p-phenylenevinylene) Derivatives
Effect of 3D π-π Stacking on Photovoltaic and Electroluminescent Properties in Triphenylamine-containing Poly(p-phenylenevinylene) Derivatives
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DOI：
10.1021/ma800847f
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发表时间：
2008-06
期刊：
影响因子：
5.5
通讯作者：
P. Shen;Guangyi Sang;Junjian Lu;Bin Zhao;M. Wan;Y. Zou;Yongfang Li;Songting Tan
中科院分区：
文献类型：
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作者：
P. Shen;Guangyi Sang;Junjian Lu;Bin Zhao;M. Wan;Y. Zou;Yongfang Li;Songting Tan
通过Wittig-Horner反应合成了含有两个三苯胺侧链的3D π−π堆积结构的聚对苯撑乙烯（PPV）衍生物。沿着这些π-共轭聚合物主链的2，5-双（4-（N，N-二苯基氨基）亚苯基亚乙烯基单元的存在降低了带隙，因此所得聚合物在可见光区表现出强而宽的吸收。三苯胺基团通过3D π−π堆积有效地延长了聚合物的共轭长度，提高了聚合物的空穴传输性能。此外，还详细研究了三苯胺基团的三维π−π堆积效应对聚合物发光器件（PLED）和光伏太阳能电池性能的影响。P1和P2的单层发光器件的最大电致发光（EL）亮度分别达到3003和1697 cd/m2。以P1或P2和PCBM（1：1，w/w）为基质的本体异质结聚合物光伏电池（PPVCs）显示出良好的光伏性能。
Poly(p-phenylenevinylene) (PPV) derivatives containing the 3D π−π stacking structures of the triphenylamine moieties as two side chains have been synthesized by the Wittig−Horner reaction. The presence of 2,5-bis(4-(N,N-diphenylamino)phenylenevinylene units along these π-conjugated polymer backbone lowered the band gap, and thus the resulting polymers exhibited strong and broad absorption in the visible region. Triphenylamine groups effectively extended the conjugation length through 3D π−π stacking and enhanced the hole-transporting properties of the polymers. Furthermore, the 3D π−π stacking effects of the triphenylamine moieties on the properties of the polymer light-emitting devices (PLEDs) and photovoltaic solar cells were also investigated in detail. The maximum electroluminescence (EL) brightness of the single-layer light emitting devices for P1 and P2 achieved 3003 and 1697 cd/m2, respectively. The bulk heterojunction polymer photovoltaic cells (PPVCs) based on P1 or P2 and PCBM (1:1, w/w) showed ...