中国科学院长春光学精密机械与物理研究所

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	Triphenylene-Based Emitters with Hybridized Local and Charge-Transfer Characteristics for Efficient Nondoped Blue OLEDs with a Narrowband Emission and a Small Efficiency Roll-Off
	F. Liu; G. Cao; Z. Feng; Z. Cheng; Y. Yan; X. Y; J. Y; C. Y; L. Y and L. P
	2023
发表期刊	ACS Applied Materials and Interfaces
ISSN	19448244
卷号	15期号:40页码:47307-47316
摘要	Developing high-efficiency nondoped blue organic light-emitting diodes (OLEDs) with high color purity and low-efficiency roll-off is vital for display and lighting applications. Herein, we developed two asymmetric D-π-A blue emitters, PIAnTP and PyIAnTP, in which triphenylene is first utilized as a functional acceptor. The relatively weak charge transfer (CT) properties, rigid molecular structures, and multiple supramolecular interactions in PIAnTP and PyIAnTP can significantly enhance the fluorescence efficiency and suppress the structural relaxations to obtain a narrowband blue emission. The photophysical experiments and theoretical simulations reveal that they both exhibit a typical hybridized local and charge-transfer (HLCT) excited state and achieve high external quantum efficiency (EQE) via a "hot exciton" channel. As a result, PIAnTP- and PyIAnTP-based nondoped devices realize blue emission at 456 and 464 nm, corresponding to CIE coordinates of (0.16, 0.14) and (0.16, 0.19), narrow full width at half-maximums of 52 and 60 nm, and the high EQEs of 8.36 and 8.69%, respectively. More importantly, the PIAnTP- and PyIAnTP-based nondoped devices show small EQE roll-offs of only 5.9 and 2.4% at 1000 cd m-2, respectively. These results signify an advance in designing a highly efficient blue emitter for nondoped OLEDs. © 2023 American Chemical Society
DOI	10.1021/acsami.3c09433
URL	查看原文
收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67687
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. Liu,G. Cao,Z. Feng,et al. Triphenylene-Based Emitters with Hybridized Local and Charge-Transfer Characteristics for Efficient Nondoped Blue OLEDs with a Narrowband Emission and a Small Efficiency Roll-Off[J]. ACS Applied Materials and Interfaces,2023,15(40):47307-47316.
APA	F. Liu.,G. Cao.,Z. Feng.,Z. Cheng.,Y. Yan.,...&L. Y and L. P.(2023).Triphenylene-Based Emitters with Hybridized Local and Charge-Transfer Characteristics for Efficient Nondoped Blue OLEDs with a Narrowband Emission and a Small Efficiency Roll-Off.ACS Applied Materials and Interfaces,15(40),47307-47316.
MLA	F. Liu,et al."Triphenylene-Based Emitters with Hybridized Local and Charge-Transfer Characteristics for Efficient Nondoped Blue OLEDs with a Narrowband Emission and a Small Efficiency Roll-Off".ACS Applied Materials and Interfaces 15.40(2023):47307-47316.

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