| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터) |
| 권호 |
43권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Time-resolved spectroscopic analysis of the light-energy harvesting mechanism in carbazole-dendrimers with a blue-phosphorescent Ir-complex core |
| 초록 |
In order to investigate the light-energy harvesting mechanism, a series of dendrimers with a heteroleptic iridium(III) complex core, [Ir(dmb)2(pic-Czn)] (Gn: n = 1, 2, and 3) was synthesized. The Ir-core [Ir(dmb)2(pic-OCH3), G0] shows a blue emission at ~500 nm, which is assigned to 3MLCT phosphorescence. This phosphorescence was enhanced with increasing generations due to the increase in the total absorbance of the Cz-dendron. The light-harvesting efficiencies determined by various methods were approximately 160 (G1), 220 (G2), and 330% (G3). The energy transfers efficiencies for G1–G3 from the peripheral Cz-dendron to the Ir-core complex were above 97%. The time-resolved TA band correlated with the core Ir-complex was observed at 500 nm, though it overlapped and interfered with the intense TA band of the Cz-dendrons. Therefore, we attempted a global analysis by singular value decomposition (SVD). |
| 저자 |
박재현, 곽수진, 조양진, 김소연, 손미랑, 조대원, 강상욱, 손호진
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| 소속 |
고려대 |
| 키워드 |
carbazole-dendrimers |
| E-Mail |
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