| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 가을 (10/22 ~ 10/24, 대전 DCC) |
| 권호 |
20권 2호, p.1912 |
| 발표분야 |
재료 |
| 제목 |
Air-stable PbSe nanocrystal quantum dots via efficient halide passivation |
| 초록 |
PbSe nanocrystal quantum dots (NQDs) have been extensively investigated for various electronic applications such as IR-detectors, lasers, and solar cells. A narrow bulk band gap (0.26 eV), a large exciton Bohr radius (46 nm), size-tunable energy levels, and efficient carrier multiplication (CM) make them suited in such applications. However, susceptibility to oxidation of PbSe NQDs strongly hampers the further development of PbSe-based electronic devices. In this study, we developed simple halide treatment to improve the stability of PbSe NQDs. Absorption, photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS) data reveal that halide treated PbSe NQDs are highly oxidation-resistive in ambient condition. Density functional theory (DFT) calculations support that improved stability of PbSe NQDs with halide treatment is due to the atomically thin halide adlayer formation on PbSe NQD surface. Finally, we fabricated the air stable NQD-based field effect transistors (FETs) via halide treatment. |
| 저자 |
우주영1, 고재현1, 송정훈2, 김경남2, 최혜경2, 김용현1, 이도창1, 정소희2
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| 소속 |
1한국과학기술원, 2한국기계(연) |
| 키워드 |
PbSe; Quantum dot; Halide; Stability
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| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
