کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4765866 1423892 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fine-tuning the emissions of highly efficient thermally activated delayed fluorescence emitters with different linking positions of electron-deficient substituent groups
ترجمه فارسی عنوان
تنظیم دقیق انتشار گازهای خروجی بسیار مؤثر از لحاظ تداخل دارویی فلورسانس تاخیری با موقعیت های مختلف اتصال به گروه های جایگزین الکترون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
To further develop a simple method for emission fine-tuning, two novel thermally activated delayed fluorescence (TADF) emitters, 5′-(10H-phenoxazin-10-yl)-[1,1′:3′,1″-terphenyl]- 2′,4,4″- tricarbonitrile (mPTBC) and 2′-(10H-phenoxazin-10-yl)-[1,1′:3′,1″- terphenyl]-4,4″,5′-tricarbonitrile (oPTBC) have been designed and synthesized by employing exactly the same functional units, a ter-benzonitrile and a phenoxazine (PXZ). By adjusting the linking position of the two electron-deficient benzonitrile arms from a meta-position to an ortho-position with the cyano core, the LUMO energy levels of mPTBC and oPTBC are varied to −2.98 and −3.13 eV, respectively; while the HOMO energy levels remain similar. In devices, the new TADF emitters successfully exhibit similar maximum efficiencies, but different-color emissions with a spectral peak at 516 nm for mPTBC and a spectral peak at 540 nm for oPTBC. These results prove the simple modification of adjusting the linking position of electron-deficient substituent groups in the molecules can effectively fine-tune the emissions of TADF emitters but without significantly changing other key performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 143, August 2017, Pages 62-70
نویسندگان
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