کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7908074 | 1510759 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Assistant dopant system in solution processed phosphorescent OLEDs and its mechanism reveal
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Assistant dopant system in solution processed phosphorescent OLEDs and its mechanism reveal Assistant dopant system in solution processed phosphorescent OLEDs and its mechanism reveal](/preview/png/7908074.png)
چکیده انگلیسی
We have developed an assistant dopant system in phosphorescent OLEDs. The system is consisted of a conventional host material 4,4â²-Bis(carbazol-9-yl)biphenyl (CBP), a thermally activated delayed fluorescence (TADF) 2,4,5,6-tetrakis(carbazol-9-yl)-1,3-dicyanobenzene (4CzIPN) and a red phosphor Bis[2-(4-n-hexylphenyl)quinoline](acetylacetonate)iridium(III) (Hex-Ir(phq)2(acac)), it has achieved maximum current efficiency and external quantum efficiency of 21.52Â cd/A and 9.22%, respectively. The intrinsic mechanism and energy transfer process in the system have been discussed in detail. Moreover, a satisfactory critical current density J0 of 106.1Â mA/cm2 has been obtained when the assistant dopant concentration ascends to a suitable level, which indicated low efficiency roll-off of the device. By investigating the exciton generation mechanism and the transient electroluminescence (EL), the main cause of the improvement has been revealed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 75, January 2018, Pages 513-520
Journal: Optical Materials - Volume 75, January 2018, Pages 513-520
نویسندگان
Juntao Hu, Sheng Hu, Chaochao Lu, Yang Huang, Kai Xu, Xianghua Wang,