| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 가을 (10/24 ~ 10/26, 부산 BEXCO) |
| 권호 |
18권 2호, p.2360 |
| 발표분야 |
재료 |
| 제목 |
Achieving high yield quantum dot/polymer films through silica particle aided dispersion enhancement |
| 초록 |
We have fabricated quantum dot (QD)/polymer films of high quantum yield by coating silica or hollow silica particles with QDs. When particles were dispersed in tetrahydrofuran, free QD suspension exhibited higher quantum yield than QD-coated silica/hollow silica particles. Scattering is a most likely reason for the drop in quantum yield for the QD-coated silica particles, as supported by results with silica particles with varying morphologies. In the QD/polymer films, however, QD-coated silica/hollow silica particles showed significant enhancement in quantum yield. The quantum yield of QD-coated hollow silica particles was lower than that of QD-coated silica particles because of lower structural stability. Introducing silica particles prevents spectral redshift of emission peak when prepared in the form of film, as opposed to QD-only sample. Our findings point to the possibility that QD-coated silica/hollow silica particles exhibit superior stability, quantum efficiency, and color accuracy, which render them potentially useful for the next-generation light-emitting devices and photovoltaics. |
| 저자 |
김현창1, 홍현국1, 윤철상1, 최 훈1, 안익성1, 이도창2, 김영주1, 이강택1
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| 소속 |
1연세대, 2KAIST |
| 키워드 |
quantum dots; PDMS; quantum yield; silica particles; hollow silica particles
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| E-Mail |
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| 원문파일 |
초록 보기 |
