| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
에너지변환 및 저장시스템(분자전자 부문위원회) |
| 제목 |
A Reduction Pathway in the Synthesis of PbSe Nanocrystal Quantum Dots. |
| 초록 |
Colloidal nanocrystal quantum dots (NQDs) of narrow band gap materials are of substantial general interest because of their unparalleled potential as infrared fluorophores. In this work, we specifically examine the effects of diphenylphosphine and 1,2-hexadecanediol, as surrogates for putative trioctylphosphine-based reducing impurities, on the synthesis of PbSe NQDs. Specifically, we compare their influence on NQD size, chemical yield, and photoluminescence quantum yield. While both additives substantially increase the chemical yield of the synthesis, they demonstrate markedly different effects on emission quantum yield of the product NQDs. We further examine the effects of reaction temperature and oleic acid concentration on the diol-assisted synthesis. Finally, we use numerical simulations to support the conjecture that the increased yield is likely a result of faster monomer formation, consistent with the activation of an additional reaction pathway by the reducing species. |
| 저자 |
주진1, Victor I. Klimov2, JeffreJ. M. Pietryga2, John A. McGuire2, Sea-Ho Jeon2, Darrick J. Williams2, Hsing-Lin Wang2
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| 소속 |
1경북대, 2Los Alamos National Laboratory |
| 키워드 |
PbSe Synthesis; Quantum dots; Carrier Multiplication
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| E-Mail |
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