TY - JOUR
T1 - Band Engineering-Tuned Localized Surface Plasmon Resonance in Diverse-Phased Cu2- xSySe1- yNanocrystals
AU - Li, Han
AU - Shibuta, Masahiro
AU - Yamada, Takashi
AU - Hojo, Hajime
AU - Kato, Hiroyuki S.
AU - Teranishi, Toshiharu
AU - Sakamoto, Masanori
N1 - Funding Information:
This work was supported by KAKENHI JP21H04638 (Grant-in-Aid for Scientific Research [A]) (M.S.), 21 J15848 (JSPS Research Fellowship) (H.L.), and the China Scholarship Council (CSC) (H.L.). This work was also supported by the JST FOREST Program (Grant Number PMJFR201M) (M.S.) This research is supported by the Adaptable and Seamless Technology transfer Program through Target-driven R&D (A-STEP) from JST Grant Number JPMJTR20T1 (M.S.).
Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022
Y1 - 2022
N2 - Cation-deficient copper chalcogenide nanocrystals (NCs) as a typical degenerated semiconductor have attracted great attention owing to their unique properties. However, the association between band structures and localized surface plasmon resonance (LSPR) in such NCs has not been thoroughly studied. Moreover, the synthesis of the colloidal Cu2-xSeyS1-y NCs with diverse crystal phases remains a challenge to date. Hence, we developed a facile method to synthesize a range of Cu2-xSeyS1-y-alloyed NCs with disparate crystal phases. We elucidated the tunable band structures and LSPR shift, and the results indicated that the modulation of the valance band maximum (VBM) position by Se/S alloying and the overlapping of the valence band and the Fermi level (EF) dominate LSPR properties in alloyed NCs. Not only the variation of Cu vacancy along with the induced free carrier concentration but also the negative shift of VBM contribute to the LSPR shift toward higher energy.
AB - Cation-deficient copper chalcogenide nanocrystals (NCs) as a typical degenerated semiconductor have attracted great attention owing to their unique properties. However, the association between band structures and localized surface plasmon resonance (LSPR) in such NCs has not been thoroughly studied. Moreover, the synthesis of the colloidal Cu2-xSeyS1-y NCs with diverse crystal phases remains a challenge to date. Hence, we developed a facile method to synthesize a range of Cu2-xSeyS1-y-alloyed NCs with disparate crystal phases. We elucidated the tunable band structures and LSPR shift, and the results indicated that the modulation of the valance band maximum (VBM) position by Se/S alloying and the overlapping of the valence band and the Fermi level (EF) dominate LSPR properties in alloyed NCs. Not only the variation of Cu vacancy along with the induced free carrier concentration but also the negative shift of VBM contribute to the LSPR shift toward higher energy.
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U2 - 10.1021/acs.jpcc.2c01149
DO - 10.1021/acs.jpcc.2c01149
M3 - Article
AN - SCOPUS:85129975322
SN - 1932-7447
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
ER -