Understanding the localized surface plasmon resonance (LSPR) and the intraband transition of semiconductor nanocrystals (NCs) has attracted considerable attention since it can provide the opportunity to investigate the boundary between the metal and the semiconductor. It has been reported that optical properties in semiconductor NCs can vary from excitonic to plasmonic by tuning the free carrier density level. Although many researchers have developed doping methods that inject impurity dopants into NCs for varying the LSPR frequency, other factors have not been focused on yet. In this feature article, we highlight the optical change of heavily doped NCs arising from the transformation of the crystal phase. By examining various metal chalcogenide NCs, we emphasize the impact of synthesis conditions, composition ratio, heterogeneous elements, and surface ligands on the crystal phase, which simultaneously has a critical role in shifting the LSPR frequency. Moreover, the future directions suggest numerous promising research objects on metal chalcogenide materials related to LSPR properties for potential applications.
Bibliographical noteFunding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (2021R1A2C2092053), the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF2019M3D1A1078299), and a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2021M3H4A3A01062964).
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics