Formation of High-Quality CdS and Other II-VI Semiconductor Nanocrystals in Noncoordinating Solvents: Tunable Reactivity of Monomers

Yu, William W.; Peng, Xiaogang

doi:10.1002/1521-3773(20020703)41:13<2368::aid-anie2368>3.0.co;2-g

Cited by 1,238 publications

(900 citation statements)

References 16 publications

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“…In the work presented here, the SnS NCs are formed from Sn(Et 2 Dtc) 2 in an oleylamine/oleic acid mixture. The presence of oleic acid in the reaction mixture serves as a ligand and also plays a vital role in the formation of nanoscale tin sulfide by controlling the reactivity of precursors [26,27]. XRD analysis verified the formation of highly crystalline SnS NCs (Fig.…”

Section: Resultsmentioning

confidence: 91%

Synthesis of SnS nanocrystals by the solvothermal decomposition of a single source precursor

2007

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SnS nanocrystals (NCs) were synthesized from bis(diethyldithiocarbamato) tin(II) in oleylamine at elevated temperature. High-resolution transmission electron microscopy (HRTEM) investigation and X-ray diffraction (XRD) analysis showed that the synthesized SnS particles are monocrystalline with an orthorhombic structure. The shape and size tunability of SnS NCs can be achieved by controlling the reaction temperature and time, and the nature of the stabilizing ligands. The comparison between experimental optical band gap values shows evidence of quantum confinement of SnS NCs. Prepared SnS NCs display strong absorption in the visible and near-infrared (NIR) spectral regions making them promising candidates for solar cell energy conversion.

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Section: Resultsmentioning

confidence: 91%

Synthesis of SnS nanocrystals by the solvothermal decomposition of a single source precursor

2007

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“…In this way, semiconductor nanocrystals would result particularly suitable, because their small dimensions (between 1 and 10 nm) are obtained with high accuracy by standard colloidal chemistry synthesis [17]. Therefore, band-gap of colloidal nanocrystals (and hence absorption and emission wavelengths) can be tuned among a wide spectral range that depends not only on composition, but also on the size of the nanocrystal (see Fig.…”

Section: Size Dependent Band Gapmentioning

confidence: 99%

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Suárez¹

2016

Eur. Phys. J. Appl. Phys.

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Abstract. Semiconductor nanocrystals have arisen as outstanding materials to develop a new generation of optoelectronic devices. Their fabrication under simple and low cost colloidal chemistry methods results in cheap nanostructures able to provide a wide range of optical functionalities. Their attractive optical properties include a high absorption cross section below the band gap, a high quantum yield emission at room temperature, or the capability of tuning the band-gap with the size or the base material. In addition, their solution process nature enables an easy integration on several substrates and photonic structures. As a consequence, these nanoparticles have been extensively proposed to develop several photonic applications, such as detection of light, optical gain, generation of light or sensing. This manuscript reviews the great effort undertaken by the scientific community to construct active photonic devices based on these nanoparticles. The conditions to demonstrate stimulated emission are carefully studied by comparing the dependence of the optical properties of the nanocrystals with their size, shape and composition. In addition, this paper describes the design of different photonic architectures (waveguides and cavities) to enhance the generation of photoluminescence, and hence to reduce the threshold of optical gain. Finally, semiconductor nanocrystals are compared to organometallic halide perovskites, as this novel material has emerged as an alternative to colloidal nanoparticles.

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“…One of the major challenges in the colloidal synthesis of nanomaterials is balancing the two very different processes of nucleation and growth due to their different microscopic mechanisms, reaction orders, etc [5,6]. If the nanoparticle nucleation rate is not properly balanced with the growth rate, i.e., the nucleation rate is either too slow or too fast with respect to the growth rate, the reaction will generate either bulk material or tiny clusters [6,7].…”

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confidence: 99%

Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies

et al. 2007

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We have demonstrated that seeded growth of nanocrystals offers a convenient way to design nanoheterostructures with complex shapes and morphologies by changing the crystalline structure of the seed. By using CdSe nanocrystals with wurtzite and zinc blende structure as seeds for growth of CdS nanorods, we synthesized CdSe/CdS heterostructures nanorods and nano-tetrapods, respectively. Both of these structures showed excellent luminescent properties, combining high photoluminescence efficiency (~80% and ~50% for nanorods and nano-tetrapods, correspondingly), giant extinction coefficients (~2·10 7 M -1 cm -1 and ~1.5·10 8 M -1 cm -1 at 350 nm for nanorods and nano-tetrapods, correspondingly) and efficient energy transfer from the CdS arms into the emitting CdSe core. † Current address:

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Formation of High-Quality CdS and Other II-VI Semiconductor Nanocrystals in Noncoordinating Solvents: Tunable Reactivity of Monomers

Cited by 1,238 publications

References 16 publications

Synthesis of SnS nanocrystals by the solvothermal decomposition of a single source precursor

Synthesis of SnS nanocrystals by the solvothermal decomposition of a single source precursor

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies

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