| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
OLED 소재 및 소자기술 동향(분자전자 부문위원회) |
| 제목 |
A high efficiency red phosphorescent organic light emitting diodes (PHOLEDs) using phosphine oxide derivatives as a host material |
| 초록 |
We have designed and synthesized a new red phosphorescent host material based on the phosphine oxide moiety. The highest occupied molecular orbital (HOMO) and the lowest occupied molecular orbital (LUMO) of the 2',7'-bis(diphenylphosphoryl)spiro[benzofluorene-7,9'-fluorene] (SPPO21) were 6.12 eV and 2.57 eV, respectively. The triplet energy level of SPPO21 was calculated to be 2.32 eV. The red phosphorescent organic light-emitting diodes (PHOLEDs) were fabricated using the SPPO21 based emitting layer doped with iridium(III) bis(2-phenylquinoline) acetylacetonate. A high quantum efficiency of 19.3% with a current efficiency of 31.1 cd/A was achieved in the SPPO21 red PHOLEDs at 2% doping concentration due to good energy transfer from host to red dopant. |
| 저자 |
장상억, 전순옥, 육경수, 주철웅, 손효석, 서창우, 이준엽
|
| 소속 |
단국대 |
| 키워드 |
phosphine oxide; phosphorescent
|
| E-Mail |
|
