Bipolar Host Materials Based on 1,3,5-Triazine Derivative for Green Phosphorescent Organic Light-emitting Diode
Bipolar Host Materials Based on 1,3,5-Triazine Derivative for Green Phosphorescent Organic Light-emitting Diode
송정은(경희대학교); 이송은(홍익대학교); 송영란(한남대학교); 김태우(경희대학교); 임춘우(한남대학교); 김영관(홍익대학교)
38권 9호, 1003~1009쪽
초록
We designed and synthesized new bipolar host materials 2–4, through microwave-assisted Suzuki-coupling reaction with 1,3,5-triazine unit and carbazole/fluorene group. The photophysical and thermal properties of the synthesized 1,3,5-triazine derivatives 2–4 were investigated by ultraviolet–visible (UV–vis) spectrometer, spectrofluorometer, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The 1,3,5-triazine derivatives 2–4 have suitable energy bandgap (Eg = 3.15–3.35 eV) and high triplet energy level (ET, 2.63–2.87 eV) for phosphorescent green host. Device performance of 2–4 materials shows that maximum luminescence efficiency (LE) and external quantum efficiency (EQE) of green device A–C were 29.25, 49.67, and 48.74 cd/A and 8.68, 14.52, and 14.30%, respectively.
Abstract
We designed and synthesized new bipolar host materials 2–4, through microwave-assisted Suzuki-coupling reaction with 1,3,5-triazine unit and carbazole/fluorene group. The photophysical and thermal properties of the synthesized 1,3,5-triazine derivatives 2–4 were investigated by ultraviolet–visible (UV–vis) spectrometer, spectrofluorometer, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The 1,3,5-triazine derivatives 2–4 have suitable energy bandgap (Eg = 3.15–3.35 eV) and high triplet energy level (ET, 2.63–2.87 eV) for phosphorescent green host. Device performance of 2–4 materials shows that maximum luminescence efficiency (LE) and external quantum efficiency (EQE) of green device A–C were 29.25, 49.67, and 48.74 cd/A and 8.68, 14.52, and 14.30%, respectively.
- 발행기관:
- 대한화학회
- 분류:
- 화학