Linearly polarised organic light-emitting diodes (OLEDs): synthesis and characterisation of a novel hole-transporting photoalignment copolymer
作者:Matthew P. Aldred、Panos Vlachos、Adam E. A. Contoret、Simon R. Farrar、W. Chung-Tsoi、Bassam Mansoor、Kai L. Woon、Robert Hudson、Stephen M. Kelly、Mary O'Neill
DOI:10.1039/b506063j
日期:——
We describe the synthesis and characterisation of a novel hole transporting photoalignment copolymer for linearly polarised emission. The copolymer has a coumarin side-chain which undergoes (2 + 2) cycloaddition on irradiation with ultraviolet light. A fluorene side-chain, whose ionisation potential is well matched to the work-function of indium tin oxide, provides hole transporting properties. Polarised green electroluminescence was obtained by spin coating a novel polymerisable and light-emitting liquid crystal onto the photoaligned copolymer. A polarisation ratio value of 13 : 1 and a polarised irradiance of 200 cd m−2 was obtained at 9 V. Polarised red emission is also described in a guest–host configuration. The spatial patterning of the polarisation direction is also shown.
我们描述了一种用于线性偏振发射的新型空穴传输光配位共聚物的合成和特性。这种共聚物具有香豆素侧链,在紫外线照射下会发生 (2 + 2) 环加成反应。芴侧链的电离电位与氧化铟锡的功函数非常匹配,因此具有空穴传输特性。通过在光配位共聚物上旋涂一种新型可聚合发光液晶,获得了偏振绿色电致发光。在 9 V 电压下,偏振比值为 13:1,偏振辐照度为 200 cd m-2。此外,还显示了偏振方向的空间图案。