TY - JOUR
T1 - Tunable photoluminescence wavelength of chalcopyrite CuInS 2-based semiconductor nanocrystals synthesized in a colloidal system
AU - Nakamura, Hiroyuki
AU - Kato, Wataru
AU - Uehara, Masato
AU - Nose, Katsuhiro
AU - Omata, Takahisa
AU - Otsuka-Yao-Matsuo, Shinya
AU - Miyazaki, Masaya
AU - Maeda, Hideaki
PY - 2006/7/11
Y1 - 2006/7/11
N2 - Chalcopyrite-type CuInS2-based alloyed fluorescent nanocrystals (NCs), which contain no regulated heavy metal ions, were synthesized by heating an organometallic solution to demonstrate optical property tunability. Introduction of Zn into the CuInS2 system enhanced their photoluminescence (PL) intensity. The resultant particles were 3-6 nm; they varied with experimental conditions and were discrete and colloidally stable. The band-gap energy and PL wavelength of Zn-Cu-In-S (ZCIS) NCs varied with Zn content and particle size. Their PL was controllable within 570-800 nm by altering the band-gap energy. Furthermore, indium substitution with gallium was shown to control band-gap energy toward ∼3.1 eV, 500 nm of PL wavelength. In addition, ZnS coating of this nanocrystal can approximately double the PL strength. Finally, surface treatment with mercaptoundecanoic acid dispersed hydrophilic ZCIS NCs into water.
AB - Chalcopyrite-type CuInS2-based alloyed fluorescent nanocrystals (NCs), which contain no regulated heavy metal ions, were synthesized by heating an organometallic solution to demonstrate optical property tunability. Introduction of Zn into the CuInS2 system enhanced their photoluminescence (PL) intensity. The resultant particles were 3-6 nm; they varied with experimental conditions and were discrete and colloidally stable. The band-gap energy and PL wavelength of Zn-Cu-In-S (ZCIS) NCs varied with Zn content and particle size. Their PL was controllable within 570-800 nm by altering the band-gap energy. Furthermore, indium substitution with gallium was shown to control band-gap energy toward ∼3.1 eV, 500 nm of PL wavelength. In addition, ZnS coating of this nanocrystal can approximately double the PL strength. Finally, surface treatment with mercaptoundecanoic acid dispersed hydrophilic ZCIS NCs into water.
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U2 - 10.1021/cm0518022
DO - 10.1021/cm0518022
M3 - Article
AN - SCOPUS:33746590310
VL - 18
SP - 3330
EP - 3335
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 14
ER -