کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6599469 | 1423886 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel electron acceptor based on spiro[fluorine-9,9â²-xanthene] for exciplex thermally activated delayed fluorescence
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two cyano-substituted spiro[fluorine-9,9â²-xanthene] (SFX) derivatives, 2-carbonitrile-spiro[fluorene-9,9â²-xanthene] (CNSFX) and 2,7-dicarbonitrile-spiro[fluorene-9,9â²-xanthene] (DCNSFX) were conveniently prepared as electron acceptors to combine with tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as electron donor to form exciplex emitters, respectively. Favorable exciplex-TADF was successfully achieved with photoluminescence quantum yield of 31% and electroluminescence efficiency of 8.2 cd Aâ1 in TCTA:DCNSFX, which possesses increases of 1.1 and 3.3 times than those (15% and 1.9 cd Aâ1) of TCTA:CNSFX, respectively. The relatively favorable performance of TCTA:DCNSFX is related to the stronger electron-accepting ability through dicyano-substitution and larger driving force in the exciplex emission. These appealing results reveal that the dicyano-substituted SFX derivative opens interesting perspectives for developing favorable exciplex-TADF organic light-emitting diodes in the future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 149, February 2018, Pages 422-429
Journal: Dyes and Pigments - Volume 149, February 2018, Pages 422-429
نویسندگان
Hong-Tao Cao, Yu Zhao, Chen Sun, Da Fang, Ling-Hai Xie, Min-Nan Yan, Ying Wei, Hong-Mei Zhang, Wei Huang,