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The relationship between the host structure and optimum doping concentration in red phosphorescent organic light-emitting diodes

机译：红色磷光有机发光二极管的主体结构与最佳掺杂浓度之间的关系

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摘要

The effect of the host structure on the optimum doping concentration in red phosphorescent organic light-emitting diodes (PHOLEDs) was investigated. A mixed host of the phosphine oxide derivative (SPP021) and 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA) was used as the host in the red PHOLED and the device performances were studied according to the doping concentration. The device performance of the red PHOLED was optimized at a doping concentration of 2% in the SPP021 rich red PHOLED, while the device performance was optimized at a doping concentration of 6% in the device with 50% TCTA content. It was found that the optimum doping concentration was determined by the energy transfer and charge trapping.
机译：研究了主体结构对红色磷光有机发光二极管（PHOLED）中最佳掺杂浓度的影响。在红色PHOLED中，使用氧化膦衍生物（SPP021）和4,4'，4“-三（N-咔唑基）三苯胺（TCTA）的混合基质作为基质，并根据掺杂浓度研究了器件性能。在富含SPP021的红色PHPH中，红色PHOLED的器件性能在2％的掺杂浓度下得到了优化，而在TCTA含量为50％的器件中，红色的PHOLED在6％的掺杂浓度下得到了优化。最佳掺杂浓度由能量转移和电荷俘获决定。

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