A Highly Regular Hexapod Structure of Lead Sulfide: Solution Synthesis and Raman Spectroscopy

Zhang, Yahui; Guo, Lin; Yin, Penggang; Zhang, Rui; Zhang, Qi; Yang, Shihe

doi:10.1002/chem.200600936

Cited by 47 publications

(28 citation statements)

References 35 publications

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“…During the growth process, crystals tend to grow along low index planes to minimize the surface energy, which is crucial to the growth rate of the crystallites. PVP was selectively absorbed onto (100) facets of the PbSe crystals through coordination bonding with O and N atoms of the pyrrollidine ring, decreasing their growth rates in <100> directions [25]. This leads to highly anisotropic growth of PbSe.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of monodispersed PbSe nanocubes

Wang¹,

Dong

et al. 2009

Cryst. Res. Technol.

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Monodispersed PbSe nanocubes were synthesized through a simple hydrothermal method by using Pb 2+ -EDTA complex and Na 2 SeSO 3 . Composition and morphology of the samples were characterized by means of XRD, TEM and SEM. The gradually releasing of Pb 2+ from Pb 2+ -EDTA complex, and the adopting of PVP can adjust the growth rate in <100> and <111> directions of PbSe. Both Pb 2+ -EDTA complex and PVP played important roles in the crystal growth of the monodispersed PbSe nanocubes. In addition, UV-vis and photoluminescence properties were characterized. E g of the PbSe nanocubes is 1.5 eV approximately, which is much larger than that of bulk PbSe. Under PL excitation at 406 nm, a red emission peak at 696 nm is observed, showing that the synthesized PbSe is luminescent nanomaterials.

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Section: Resultsmentioning

confidence: 99%

Preparation and characterization of monodispersed PbSe nanocubes

Wang¹,

Dong

et al. 2009

Cryst. Res. Technol.

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“…This might be a texture effect as well, like with sheets, since the stars have a favorite orientation on the substrate -they are sitting with three of their arms on the substrate. We can assume that the arms are growing from {100} planes, 16,17 the planes parallel to the substrate would then be the {111} planes and have a higher chance to be detected by the XRD. After washing the product several times to remove excess ligand from the surface of the crystals the XRD intensities did not change ( Figure S3), which supports the notion that the arms grow in the <100> directions and the texture effect stems from the shape of the product.…”

Section: Influence Of the Sulfide Sourcementioning

confidence: 99%

New ways to synthesize lead sulfide nanosheets—substituted alkanes direct the growth of 2D nanostructures

Bielewicz¹,

Klein²,

Klinke³

2016

Nanotechnology

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“…nearly identical except for a slight broadening of the spectra in the seed, which is likely due to disorder in the crystal structure. Additionally, this spectra matches that of the PbS nano-structures grown by solvothermal synthesis, presented by Zhang et al [103]. Results indicate successful growth of both PbS seeds and films.…”

Section: Figure 42 As Seen In This Sem Image the Seed Density Of Pbsupporting

confidence: 87%

Mid-IR Range Photosensitive Device Based on Chemically Deposited Nanocrystalline Chalcogenide Thin Films with Tunable Opto-electrical properties

Slonopas

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Past several decades have driven modernization of technology and machinery. This modernization has pushed the limits of our technology and increased our dependence on the energy. Additional side-effect of this rapid growth has been an exponential increase in the generated heat of the modern machinery.In most cases this waste heat is simply released into the environment. Numerous research groups have pursued an idea of capturing and converting the waste heat. Thermoelectric, pyroelectrics, organic Rankine cycle (ORC), and several other methods have been proposed to capture and convert the waste heat into electricity. Presently, all methods, however, have low conversion efficiency and are not economically feasible.In this work we focused on a practical approach to convert mid-IR electromagnetic waves to electricity. It is based on inexpensive thin film technology utilizing a junction between a narrow bandgap lead salt and wide bandgap chalcogenide film.Lead sulfide (PbS) was chosen as the narrow band semiconductors for the IR energy conversion.Lead salt photodetectors uniquely demonstrate high room temperature sensitivity to black-body sources in low temperatures and high internal quantum efficiency (QE). Further, the peculiar band structure of the lead salt allows for small Auger recombination and minimized losses.Due to its favorable opto-electrical properties and band compatibility with PbS, cadmium sulfide (CdS) was chosen as the wide bandgap semiconductor for this work.This work has shown that high quality nanocrystalline thin films of lead sulfide (PbS) and cadmium sulfide (CdS) can be grown cost efficiently using chemical bath deposition (CBD) method. Chemical bath seeding procedure was also developed in order to achieve reproducibility in the transport phenomena of the advanced materials. Seeding also allows these films to be deposited on any surface, including smooth flexible materials. Seeded kernels have shown to become the crystallization centers for both nanocrystalline films.Opto-electrical properties of the films were tuned in such a way to make the materials useful in a broad-band of the IR spectrum. We have shown that altering the parameters of the chemical bath deposition alters the grains hence changing the transport characteristics of the materials. We have shown that parameters of the chemical bath deposition can be optimized to produce highly sensitive thin films tuned to a specific range of the electromagnetic spectra.Novel transparent conducting oxide, Iridium (Ir) doped Titanium Oxide (TiO2) was developed in this work for the use in the optoelectronic device. Ir has been shown to be one of the most efficient dopants in thin films. Ir doped TiO2 has shown to have transport characteristics similar ii to those of the commonly used TCOs, with much higher optical transmittance in the infra-red range.Lastly devices were manufactured from the developed materials. TiO2/CdS/PbS/Au heterojunctions were manufactured and showed photoresponsivity. Device efficiencies were shown to depend on the...

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A Highly Regular Hexapod Structure of Lead Sulfide: Solution Synthesis and Raman Spectroscopy

Cited by 47 publications

References 35 publications

Preparation and characterization of monodispersed PbSe nanocubes

Preparation and characterization of monodispersed PbSe nanocubes

New ways to synthesize lead sulfide nanosheets—substituted alkanes direct the growth of 2D nanostructures

Mid-IR Range Photosensitive Device Based on Chemically Deposited Nanocrystalline Chalcogenide Thin Films with Tunable Opto-electrical properties

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