Synthesis and structure of undoped and indium-doped thermoelectric lead telluride nanoparticles

Kadel, Kamal; Kumari, Latha; Wang, Xuewen; Li, Wenzhi; Huang, Jianyu; Provencio, Paula Polyak

doi:10.1186/1556-276x-9-227

Cited by 14 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further strong intense peaks and other weak peaks are also indexed in the XRD pattern matching with the corresponding JCPDS file. The observed peaks were well matched with the XRD of undoped PbTe synthesized by solvothermal/hydrothermal process [58]. With the XRD of maximum yield sample A4 shows the formation of PbTe and reveals an average crystallite size of 36 nm for the A4 sample (Table 1).…”

Section: Structural Analysissupporting

confidence: 75%

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

Gite

Palve

Gaikwad³

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

Thermoelectric (TE) materials are possible solutions of the current problems in the energy sector to overcome environmental pollution, increasing energy demand and the decline of natural resources. Thermoelectric materials are a promising alternative for the conversion of waste heat to electricity. Nanocrystalline PbTe powder was synthesized by a simple chemical method at room temperature and systematically investigated at various durations as samples A1–A5. Fourier Transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), microstructural analysis by scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) confirmed the composition of the samples. TE parameters as thermo-emf of samples A1–A5 and electrical conductivity were measured. The cyclic voltammetry gives a band gap of 0.25 eV, which is in agreement with the optical band gap of the material. The A4 sample has an average crystal size of 36 nm with preferred orientation in (200) verifying the cubic morphology. The obtained TE parameters are beneficial for the non-uniform TE materials which might be due to strong current boundary scattering and extremely low thermal conductivity of the samples.

show abstract

Section: Structural Analysissupporting

confidence: 75%

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

Gite

Palve

Gaikwad³

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…More and more attentions have been paid to the bulk nanostructured thermoelectric materials due to their high thermoelectric performances [ 1 – 5 ]. Tang et al reported the layer nanostructured Bi 2 Te 3 bulk materials sintered by spark plasma sintering and combined melt spinning technique, and obtained the highest ZT value of 1.35 at 300 K [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Thermoelectric Performances of SrTiO3 Ceramic Doped with Nb by Surface Modification of Nanosized Titania

Wang

et al. 2016

Nanoscale Res Lett

View full text Add to dashboard Cite

Nb-doped SrTiO3 ceramics doped with the surface modification of nanosized titania was prepared via liquid phase deposition approach and subsequent sintered in an Ar atmosphere. The surface modification of nanosized titania significantly improved the ratio of the electrical conductivity to thermal conductivity of SrTiO3 ceramic doped with Nb, and has little impact on the Seebeck coefficient, thus obviously improving the dimensionless thermoelectric figure of merit (ZT value). The surface modification of nanosized titania is a much better method to lower the thermal conductivity and to enhance the electrical conductivity than the mechanical mixing process of nanosized titania. The highest ZT value of 0.33 at 900 K was obtained. The reason for the improved thermoelectric performances by the surface modification of nano-sized titania was preliminary investigated.

show abstract

“…Figure 6(a) shows XRD diffraction patterns recorded for PbTe precursor matched with the one in the literature, which can attributed to a face-centered cubic PbTe phase (JCPDS: 78-1905)[26]. The diffraction peaks in the XRD patterns of the synthesised precursor (CH 3 NH 3 I) are shown inFigure 6(b), can be indexed as a Tetragonal phase (JCPDS: 00-010-0737) which confirms the crystalline phase pure of the as-synthesized CH 3 NH 3 I.…”

mentioning

confidence: 55%

Synthesis and Characterisations of Mixed Tellurium and Iodine Anions Based Chacolgen‐Halogen Lead Perovskite

2020

View full text Add to dashboard Cite

Various types of low band gap materials have been reported as suitable components for the development of solar cells. These include oxygenated amorphous silicon (a-SiO:H) with energy bang gap (E g = 1.8-2.0 eV), kesterites (E g = 1.0-1.7 eV), and more recently perovskites (E g = 1.6-2.3 eV) which are ambipolar inorganicorganic hybrid semiconductors. The most extensively reported perovskite is methylammonium lead (II) iodide (CH 3 NH 3 PbI 3) with a tetragonal crystal structure having a direct E g around 1.6 eV and the power conversion efficiency (PCE) of up to 24 %. Recently, in order to resolve simultaneously both stability and toxicity challenges raised by conventional perovskite solar cells, chalcogenide materials have fascinated attention of researchers. This work, for the first time mixed tellurium (chalcogenide) and iodine (halogen) perovskite is explored to identify novel photovoltaic absorbers that can replace conventional perovskite (CH 3 NH 3 PbI 3). Therefore, we present synthesis of organic-inorganic hybrid perovskite material by means of wet chemical solution technique, by introducing during the preparation the ions of tellurium into the precursors using solvent mixture of dimethylformamide (DMF)/dimethyl sulfoxide (DMSO) at ambient temperature. The optical band gap (Eg) of CH 3 NH 3 PbI 3-x Te x was estimated to be 1.98 eV using the Tauc plot which is within the range for an ideal perovskite. The high band gap obtained makes the material as an interesting candidate for multijunction solar cells. Though, more need to be done in term of synthesis, film making and an exact tuning of the band gap.

show abstract

Synthesis and structure of undoped and indium-doped thermoelectric lead telluride nanoparticles

Cited by 14 publications

References 27 publications

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

A Facile Chemical Synthesis of PbTe Nanostructures at Room Temperature

Improved Thermoelectric Performances of SrTiO3 Ceramic Doped with Nb by Surface Modification of Nanosized Titania

Synthesis and Characterisations of Mixed Tellurium and Iodine Anions Based Chacolgen‐Halogen Lead Perovskite

Contact Info

Product

Resources

About