Scroll-like Alloyed CdSxSe1-x Nanoplatelets: Facile Synthesis and Detailed Analysis of Tunable Optical Properties

被引：53

作者：

Schlenskaya, Natalia N. ^{[1
,2
]}

Yao, Yuanzhao ^{[3
]}

Mano, Takaaki ^{[3
]}

Kuroda, Takashi ^{[3
]}

Garshev, Alexey V. ^{[1
,2
]}

Kozlovskii, Vadim F. ^{[2
]}

Gaskov, Alexander M. ^{[2
]}

Vasiliev, Roman B. ^{[1
,2
]}

Sakoda, Kazuaki ^{[3
]}

机构：

[1] Lomonosov Moscow State Univ, Dept Mat Sci, Leninskie Gory 1-73, Moscow 119991, Russia

[2] Lomonosov Moscow State Univ, Dept Chem, Leninskie Gory 1-3, Moscow 119991, Russia

[3] Natl Inst Mat Sci, Photon Mat Unit, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

来源：

CHEMISTRY OF MATERIALS | 2017年 / 29卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

COLLOIDAL SEMICONDUCTOR NANOPLATELETS; SOLUTION-PHASE SYNTHESIS; QUANTUM DOTS; SOLID-SOLUTIONS; CDSE NANOCRYSTALS; BAND-GAP; TEMPERATURE; GROWTH; PHOTOLUMINESCENCE; NANOPARTICLES;

D O I：

10.1021/acs.chemmater.6b03876

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Scroll-like colloidal quasi-two-dimensionalCdS(x)Se(1-x) nanoplatelets (NPLs) with a thickness of five monolayers and average lateral dimensions of 100 nm over the whole composition range (0 <= x <= 1) were synthesized by using a mixture of chalcogenide precursors. According to X-ray diffraction and X-ray energy dispersive spectroscopy mapping in a scanning transmission electron microscope, as-synthesized NPLs are solid solutions with a uniform elemental distribution in each individual nanoplatelet. A change in composition leads to the continuous shift and gradual broadening of exciton absorption and photoluminescence (PL) lines in the visible blue and near-ultraviolet light range. Detailed analysis of optical properties, including temperature-dependent PL spectroscopy, revealed the nonmonotonic behavior of several optical parameters (average phonon temperature, electron phonon interaction coefficient, and Stokes shift) starting from a sulfur content of similar to 40% in alloyed NPLs. This behavior may be attributed to the local composition fluctuations within CdSxSe1-x solid solution nanoplatelets.

引用

页码：579 / 586

页数：8

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