| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 가을 (10/11 ~ 10/13, 제주컨벤션센터) |
| 권호 |
42권 2호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Imidazole based materials for efficient blue organic light emitting diodes employing thermally activated delayed fluorescence |
| 초록 |
We have successfully synthesized a series of blue thermally activated delayed fluorescence emitters 4-PXN-HPI, 5-PXN -HPI, 4-PXN-HPI-C, 5-PXN-HPI-C, TPI-(PXN)4, PXN-TPI-C, HPI-PXN and their electronic and optical properties were investigated for OLED application. The density functional theory calculation shows that all of the compounds have their unoccupied molecular orbitals on the phenyl imidazole moiety. However highest occupied molecular orbital (HOMO) is widely dispersed to the whole phenoxazine group. As a result, ∆EST is reduced from 5-PXN-HPI-C ＞ 4-PXN-HPI-C ＞ TPI-(PXN)4 ＞ 4-PXN-HPI ＞ PXN-TPI-C ＞ HPI-PXN and organic light emitting diodes using these materials as dopants emit blue light and their photoluminescence quantum yield (PLQY) increase from 3.31 % to 41.2 % for HPI-PXN and 5-PXN-HPI-C, respectively. |
| 저자 |
somasundaram sivaraman1, 박상혁2
|
| 소속 |
1Kongju National Univ., 2공주대 |
| 키워드 |
OELD; TADF; PLQY; Density functional theory
|
| E-Mail |
|
