| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 봄 (04/22 ~ 04/23, 대구 EXCO) |
| 권호 |
16권 1호, p.796 |
| 발표분야 |
재료 |
| 제목 |
Chemical Synthesis of Indium Phosphide Quantum Dots with Composition Gradient ZnSexS1-x Shell |
| 초록 |
Indium phosphide colloidal quantum dots (InP QD) have been regarded as promising alternatives to replace toxic cadmium chalcogenide QDs due to its low toxicity and wide emission control window. Despite the great benefit from the eco-friendly synthetic approach, InP QD’s poor efficiency and stability make it impossible to apply for optoelectronic devices such as light-emitting diodes or photovoltaic devices. Herein, we demonstrate the synthesis of InP QDs with thick ZnSexS1-x gradient shells (InP@ZnSexS1-x), shown improved photo- and chemical stability. The InP@ZnSexS1-x QDs were characterized by UV-Visible spectroscopy, photoluminescence spectroscopy, transmittance electron microscopy. Because of the Se gradient around the core, the reduction in quantum efficiency originated from the lattice mismatch was significantly improved, implying that the formation of quenching sites is minimized by the existence of a thick shell around the emitting core. |
| 저자 |
임재훈1, 배완기1, 남민기2, 정주현1, 이성훈1, 차국헌1, 강종혁2, 박재병2
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| 소속 |
1서울대, 2삼성전자 LCD 사업부 |
| 키워드 |
quantum dot; gradient shell
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| E-Mail |
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| 원문파일 |
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