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题名:
Evaluation and prediction of color-tunable organic light-emitting diodes based on carrier/exciton adjusting interlayer
作者: Liu, Shengqiang1; Li, Jie1; Du, Chunlei2; Yu, Junsheng1
刊名: APPLIED PHYSICS LETTERS
出版日期: 2015-07-27
卷号: 107, 期号:4
文章类型: Article
英文摘要: A color tuning index (I-CT) parameter for evaluating the color change capability of color-tunable organic light-emitting diodes (CT-OLEDs) was proposed and formulated. And a series of CT-OLEDs, consisting of five different carrier/exciton adjusting interlayers (C/EALs) inserted between two complementary emitting layers, were fabricated and applied to disclose the relationship between I-CT and C/EALs. The result showed that the trend of electroluminescence spectra behavior in CT-OLEDs has good accordance with I-CT values, indicating that the I-CT parameter is feasible for the evaluation of color variation. Meanwhile, by changing energy level and C/EAL thickness, the optimized device with the widest color tuning range was based on N,N'-dicarbazolyl-3,5-benzene C/EAL, exhibiting the highest I-CT value of 41.2%. Based on carrier quadratic hopping theory and exciton transfer model, two fitting I-CT formulas derived from the highest occupied molecular orbital (HOMO) energy level and triplet energy level were simulated. Finally, a color tuning prediction (CTP) model was developed to deduce the I-CT via C/EAL HOMO and triplet energy levels, and verified by the fabricated OLEDs with five different C/EALs. We believe that the CTP model assisted with I-CT parameter will be helpful for fabricating high performance CT-OLEDs with a broad range of color tuning. (C) 2015 AIP Publishing LLC.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Applied
研究领域[WOS]: Physics
关键词[WOS]: QUANTUM EFFICIENCY ; DEVICES
收录类别: SCI
语种: 英语
WOS记录号: WOS:000358924200009
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3673
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.UESTC, Sch Optoelect Informat, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
2.Chinese Acad Sci, Chengdu Inst Opt & Elect, Chengdu 610209, Peoples R China

Recommended Citation:
Liu, Shengqiang,Li, Jie,Du, Chunlei,et al. Evaluation and prediction of color-tunable organic light-emitting diodes based on carrier/exciton adjusting interlayer[J]. APPLIED PHYSICS LETTERS,2015,107(4).
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