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Evaluation and prediction of color-tunable organic light-emitting diodes based on carrier/exciton adjusting interlayer
Liu, Shengqiang1; Li, Jie1; Du, Chunlei2; Yu, Junsheng1
Source PublicationApplied Physics Letters
Volume107Issue:4Pages:41109
2015
Language英语
ISSN0003-6951
DOI10.1063/1.4927610
Indexed BySCI ; Ei
WOS IDWOS:000358924200009
Subtype期刊论文
AbstractA color tuning index (ICT) 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 ICT and C/EALs. The result showed that the trend of electroluminescence spectra behavior in CT-OLEDs has good accordance with ICT values, indicating that the ICT 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 ICT value of 41.2%. Based on carrier quadratic hopping theory and exciton transfer model, two fitting ICT 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 ICT 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 ICT parameter will be helpful for fabricating high performance CT-OLEDs with a broad range of color tuning. © 2015 AIP Publishing LLC.; A color tuning index (ICT) 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 ICT and C/EALs. The result showed that the trend of electroluminescence spectra behavior in CT-OLEDs has good accordance with ICT values, indicating that the ICT 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 ICT value of 41.2%. Based on carrier quadratic hopping theory and exciton transfer model, two fitting ICT 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 ICT 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 ICT parameter will be helpful for fabricating high performance CT-OLEDs with a broad range of color tuning. © 2015 AIP Publishing LLC.
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7320
Collection微电子装备总体研究室(四室)
Corresponding AuthorYu, Junsheng
Affiliation1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, China
2. Chengdu Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China
Recommended Citation
GB/T 7714
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):41109.
APA Liu, Shengqiang,Li, Jie,Du, Chunlei,&Yu, Junsheng.(2015).Evaluation and prediction of color-tunable organic light-emitting diodes based on carrier/exciton adjusting interlayer.Applied Physics Letters,107(4),41109.
MLA Liu, Shengqiang,et al."Evaluation and prediction of color-tunable organic light-emitting diodes based on carrier/exciton adjusting interlayer".Applied Physics Letters 107.4(2015):41109.
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