New Phenanthro[9,10-d]oxazole-Based Fluorophores with Hybridized Local and Charge-Transfer Characteristics for Highly Efficient Blue Non-Doped OLEDs with Negligible Efficiency Roll-Off.

التفاصيل البيبلوغرافية
العنوان:	New Phenanthro[9,10-d]oxazole-Based Fluorophores with Hybridized Local and Charge-Transfer Characteristics for Highly Efficient Blue Non-Doped OLEDs with Negligible Efficiency Roll-Off.
المؤلفون:	Xie DD; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Liao HS; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Wang BY; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Chen D; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Chi HJ; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Lv YL; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Dong Y; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address., Li X; School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, People's Republic of China E-mail: address.
المصدر:	Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2024 May 28; Vol. 30 (30), pp. e202400121. Date of Electronic Publication: 2024 Apr 23.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 9513783 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1521-3765 (Electronic) Linking ISSN: 09476539 NLM ISO Abbreviation: Chemistry Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Original Publication: Weinheim, Germany : Wiley-VCH
مستخلص:	It is vital to develop highly efficient non-doped blue organic light-emitting diodes (OLEDs) with high color purity and low-efficiency roll-off for applications in display and lighting. Herein, two blue D-A fluorophores TPA-PO and TPA-DPO are designed and synthesized, in which phenanthro[9,10-d]oxazole (PO) acts as the acceptor and triphenylamine as the donor. TPA-PO and TPA-DPO display good thermal stability and efficient luminescence efficiency in neat film. Results based on photophysical property and theoretical calculation demonstrate that TPA-PO and TPA-DPO possess the hybridized local and charge-transfer (HLCT) feature, which can utilize the triplet exciton to achieve highly efficient electroluminance (EL). The non-doped OLEDs with TPA-PO/TPA-DPO as pure emissive layer show the uniform EL emission peak at 468 nm, corresponding to CIE coordinates of (0.168, 0.187) and (0.167, 0.167), respectively. The TPA-DPO-based non-doped OLEDs provide the maximum external quantum efficiency (EQE) of 7.99 % and high exciton utility efficiency of 48.4 %~72.6 %. Moreover, the TPA-DPO-based device exhibits low-efficiency roll-off, still maintaining the EQE of 6.03 % at the high luminance of 5000 cd m ^-2 . Those findings state clearly that PO is a promising building block of blue fluorophore with a potential HLCT feature to be applied in non-doped OLEDs. (© 2024 Wiley-VCH GmbH.)
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فهرسة مساهمة:	Keywords: blue fluorophore; electroluminance; hybridized local and charge-transfer state; non-doped OLED; phenanthro[9,10-d]oxazole
تواريخ الأحداث:	Date Created: 20240327 Latest Revision: 20240528
رمز التحديث:	20240528
DOI:	10.1002/chem.202400121
PMID:	38538538
قاعدة البيانات:	MEDLINE

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تدمد:	1521-3765
DOI:	10.1002/chem.202400121