Green- and White-Light-Emitting Devices Made from Poly(9,9-dioctylfluorene) by Maskless Dye Diffusion Technique
Green- and White-Light-Emitting Devices Made from Poly(9,9-dioctylfluorene) by Maskless Dye Diffusion Technique
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采用无掩模染料扩散技术由聚（9,9-二辛基芴）制成的绿光和白光发光器件
DOI：
10.1143/jjap.44.4167
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Onoda
中科院分区：
文献类型：
--
作者：
K. Tada;M. Onoda
人们研究了通过无掩模染料扩散技术调节基于共轭聚合物聚（9,9-二辛基芴）（PDOF）的聚合物发光器件（PLED）的发射颜色。通过该技术将绿光发射染料香豆素 6 引入 PDOF 中，导致 PLED 发出绿光，而外部量子效率没有显着改变。另一方面，引入红光发射染料尼罗红，在聚（N-乙烯基咔唑）基质中产生纯红光，导致 PLED 发射白光，其外部量子效率小于原始器件。两种情况下的发射起始电压几乎加倍，表明两种染料在聚合物中都起到载流子陷阱的作用。对于发射机制，有人认为前一种情况是由从 PDOF 到香豆素 6 的有效能量转移或香豆素 6 中的直接重组控制的，而后一种情况可能包括激基复合物的形成。
Tuning the emission color of polymer light-emitting devices (PLEDs) based on a conjugated polymer poly(9,9-dioctylfluorene) (PDOF) through the maskless dye diffusion technique has been studied. The introduction of a green-light-emitting dye, Coumarin 6, into PDOF through this technique results in green light emission from the PLEDs without notable alteration of the external quantum efficiency. On the other hand, the introduction of a red-light-emitting dye, Nile red, which generates pure red light in a poly(N-vinylcarbazole) matrix, results in a white light emission from the PLEDs with an external quantum efficiency smaller than the original device. The onset voltages of emission were almost doubled for both cases, suggesting that both dyes play a role of carrier trap in the polymer. For emission mechanisms, it was suggested that the former case be governed by the efficient energy transfer from PDOF to Coumarin 6 or the direct recombination in Coumarin 6, while the latter case may include exciplex formation.