کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8032567 | 1517952 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature dependence of the driving properties for a green thermally activated delayed fluorescence device with a mixed host
ترجمه فارسی عنوان
وابستگی دما از خواص رانندگی برای یک دستگاه فلورسانس تاخیری گرما فعال با میزبان مخلوط شده
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کلمات کلیدی
دیودی که بطور ارگانیک نور صادر میکند، الکترولومینسانس گذرا، فلورسانس تاخیری فعال به صورت حرارتی، درجه حرارت، میزبان مخلوط،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
The temperature dependence of organic light-emitting diodes (OLEDs) with green thermally activated delayed fluorescence (TADF) was investigated in this study. The temperature-dependent driving properties of an OLED device based on TADF were analyzed and its transient electroluminescence characteristics at various temperatures were investigated. TADF materials feature an additional mechanism called reverse intersystem crossing (RISC) that is forbidden in conventional fluorescence. The ratio of RISC is known to be proportional to temperature. We found that the luminance of the device with a TADF material was dependent on the temperature when under fixed voltage but not when under a fixed current density. In addition, the spectrum, luminance, and power efficiency were slightly shifted as the temperature was varied from â20â¯Â°C to 50â¯Â°C. Moreover, with increasing temperature and the use of a mixed host, the rising- and decay-time properties were improved. Lastly, the dependence of device performance on the host ratio was analyzed. The results revealed that temperature dependence of rising time was due to influence of increase in both mobility and ratio of RISC, while that of decay time was mainly attributed to ratio of RISC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 660, 30 August 2018, Pages 166-170
Journal: Thin Solid Films - Volume 660, 30 August 2018, Pages 166-170
نویسندگان
Sang-Min Lee, Byeong-Kwon Ju, Chan-Jae Lee,