کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1267556 | 972360 | 2011 | 8 صفحه PDF | دانلود رایگان |
A novel tricarbazole phosphine oxide (POCz3) with high triplet energy and promising physical properties serves as a bipolar host material of blue-emitting phosphor (FIrpic) to realize highly efficient single-layer blue PhOLED which achieves a maximum external quantum efficiency up to 9% (ηp = 10.4 lm/W, ηc = 21.3 cd/A) and shows low efficiency roll-off effect. POCz3 was also utilized in a three-layer device with a double confinement effect exhibiting maximum luminance 60098 cd/m2 and maximum EQE (power efficiency) of 14.5% (31.3 lm/W).
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► A new bipolar host material was synthesized in one step.
► The promising physical properties allow the new host to realize highly efficient single- and mutiple-layer PhOLEDs.
► These devices show low efficiency roll-off effect.
Journal: Organic Electronics - Volume 12, Issue 12, December 2011, Pages 2025–2032