B. Lin, Yi-Ze Hsiao, Ming-Zer Lee, Po-Cheng Tseng, Tien‐Lung Chiu, Chi-feng Lin, Jiu-Haw Lee
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引用次数: 0
摘要
采用4,4′,4”-三(n -3-甲基苯基- n -苯基-氨基)三苯胺(m-MTDATA)和4,7-二苯基-1,10-菲罗啉(Bphen)分别作为电子给体和受体材料,分别具有不同的发光层厚度,证明了异型有机发光二极管(oled)的器件性能。优化后的oled电流效率和外量子效率(EQE)分别为11.3 cd/A和4.02%。利用瞬态电致发光(TrEL)技术研究了oled中的载流子和激子动力学。研究发现,在这种器件中,较薄的EML表现出较短的衰减时间。
Device performances of exciplex organic light-emitting diodes with different emitting layer thickness
We demonstrated device performances of exciplex organic light emitting diodes (OLEDs) by using 4, 4', 4”-tris(N-3-methyphenyl-N-phenyl-amino) triphenylamine (m-MTDATA) and 4,7-diphenyl-1,10-phenanthroline (Bphen) as electron donor and acceptor materials, respectively with different emitting layer (EML) thicknesses. The maximum current efficiency and external quantum efficiency (EQE) of the optimized OLEDs are 11.3 cd/A and 4.02%, respectively. Transient electroluminescence (TrEL) was used to understand the carrier and exciton dynamics in the OLEDs. It was found that the thinner EML exhibited a shorter decay time in such devices.