| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Bright, Robust and Color-Pure Heavy Metal-Free Quantum Dots |
| 초록 |
We provide a design principle for bright, robust and color-pure InP based quantum dots (QDs) and their applications to light-emitting diodes. The principal design approach is the growth of uniform thick inorgnanic shell consisting of ZnSexS1-x inner shell and ZnS outermost shell. Specifically, we propose a InP core/ZnSexS1-x/ZnS heterostructure that consists of environmentally benign elements. We conduct a comprehensive study across synthesis, spectroscopy and simulation and it uncovers the role of the geometry and composition of proposed heterostructures on their optical properties. The highlight of present work is the realization of green and red-emitting QDs exhibiting peak PL emission wavelength at 525 and 620 nm with narrow spectra linewidth (full width at half maximum (FWHM) below 40 nm), PL QY as high as 90 % and prolonged stability against external stresses. We capitalize on InP/ZnSexS1-x/ZnS QDs by exemplifying their use in the primary color light-emitting diodes. |
| 저자 |
함동효1, 장준혁1, 정병국2, 이학준1, 박지수3, 배완기3
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| 소속 |
1서울대, 2한국과학기술원, 3성균관대 |
| 키워드 |
quantum dots; heavy metal-free; InP
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| E-Mail |
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