期刊
NATURE MATERIALS
卷 21, 期 2, 页码 246-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41563-021-01119-8
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资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2020R1A2C2011478, 2021M3H4A3A01062964, 2020M3D1A2101319, 2021M3H4A1A01004332]
- Electronics and Telecommunications Research Institute (ETRI) - Korean government [20ZB1200]
- Samsung Display
- Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [20ZB1200] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2021M3H4A1A01004332, 2020M3D1A2101319, 2020R1A2C2011478, 2021M3H4A3A01062964] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study presents an approach to control the potential profile of III-V-II-VI h-NCs by steering dipole densities at the interface, allowing for control of the optical and electrical characteristics of these heterostructured nanocrystals. The synthesis of h-NCs with atomic precision enables correlation of interfacial dipole moments with the crystals' photochemical stability and optoelectronic performance. Controlled synthesis of heterostructured III-V-II-VI nanocrystals demonstrates that dipole moments formed at the core-shell interface can tune the optoelectronic properties of these nanomaterials and their performance in light-emitting devices.
The potential profile and the energy level offset of core-shell heterostructured nanocrystals (h-NCs) determine the photophysical properties and the charge transport characteristics of h-NC solids. However, limited material choices for heavy metal-free III-V-II-VI h-NCs pose challenges in comprehensive control of the potential profile. Herein, we present an approach to such a control by steering dipole densities at the interface of III-V-II-VI h-NCs. The controllable heterovalency at the interface is responsible for interfacial dipole densities that result in the vacuum-level shift, providing an additional knob for the control of optical and electrical characteristics of h-NCs. The synthesis of h-NCs with atomic precision allows us to correlate interfacial dipole moments with the NCs' photochemical stability and optoelectronic performance. Controlled synthesis of heterostructured III-V-II-VI nanocrystals shows that dipole moments formed at the core-shell interface can tune the optoelectronic properties of these nanomaterials and their performance in light-emitting devices.
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