Effect of bismuth doping and SiC nanodispersion on the thermoelectric properties of solution-processed PbTe

Sharma, Pradeep; Senguttuvan, T. D.; Sharma, Vijay Kumar; Patro, P.K.; Chaudhary, Sujeet

doi:10.1016/j.jallcom.2022.165390

Cited by 4 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained PbSe and PbTe are consistent with the standard card, and the diffraction patterns of other two-phase coexisting PbSe 1-x Te x films are completely in accord with the doping ratio, which is also consistent with the results obtained for the powder samples shown in the Figure S1(a-c) (Supporting Information). [14] In order to further analyze the phase and composition ratio of obtained powder samples, we use GSAS software to refine the XRD spectrum (Figure S2(a-e), Supporting Information) of the prepared samples by Rietveld. Detailed refinement results can be found in Table S1 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Te‐Doped PbSe Film Heterojunction Photodetector with Current Rectification Effect and Broadband Detection Capability

Peng

Zhang

Han

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

PbSe has attracted wide attention owing to its fascinating physical and chemical properties. It has important technical significance for infrared detectors. However, due to the inherent bandgap, low carrier mobility, and dielectric constant of PbSe, it is a significant challenge to realize fast response and mid‐infrared (MID) photodetection. Chemical doping is an efficient method to regulate the band structure and carrier mobility of materials. Nevertheless, the doped film detector cannot satisfy the demands of high‐performance photodetectors. In this paper, different composition ratios powders are synthesized by a solid‐state method. The PbSe0.5Te0.5 alloy film displays narrower bandgap, higher carrier mobility, excellent photo‐response, and broadband detection capacity. By utilizing the above superiority of PbSe0.5Te0.5 and fast charge transfer in MoSe2, a PbSe0.5Te0.5/MoSe2 p‐n heterostructure device is successfully fabricated that has significant rectifying effect (103) and extremely low dark current density (720 µA cm−2). The photodetector has a maximum responsivity (R) and specific detectivity (D*) of 17.5 A W−1 and 3.08 × 1013 Jones at 780 nm. In addition, the detector displays superior photodetection performance with broadband photodetection (405–5000 nm), high switch ratios (Ion/Ioff = 105), and fast response speed. The above outstanding properties indicate that the PbSe0.5Te0.5/MoSe2 heterostructure provides a promising and efficient strategy for achieving a miniaturized, broadband, and high‐performance photodetector.

show abstract

Section: Resultsmentioning

confidence: 99%

High‐Performance Te‐Doped PbSe Film Heterojunction Photodetector with Current Rectification Effect and Broadband Detection Capability

Peng

Zhang

Han

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…Moreover, the temperature-dependent trend is that the conductivity increases with temperature instead of decreasing. Some examples of NP-based solids that behave differently from the bulk ones include PbS, , PbTe, ,, and Ag 2 Te-PbTe. , Such thermally activated electrical conductivity represents a challenge, as it seriously impairs the zT of the solution-processed thermoelectric material at low temperatures. While the performance may be higher at high temperatures, the low performance at low temperatures deteriorates the average zT , which determines the device efficiency.…”

Section: The Challengesmentioning

confidence: 99%

Solution-Processed Inorganic Thermoelectric Materials: Opportunities and Challenges

et al. 2022

View full text Add to dashboard Cite

Thermoelectric technology requires synthesizing complex materials where not only the crystal structure but also other structural features such as defects, grain size and orientation, and interfaces must be controlled. To date, conventional solid-state techniques are unable to provide this level of control. Herein, we present a synthetic approach in which dense inorganic thermoelectric materials are produced by the consolidation of well-defined nanoparticle powders. The idea is that controlling the characteristics of the powder allows the chemical transformations that take place during consolidation to be guided, ultimately yielding inorganic solids with targeted features. Different from conventional methods, syntheses in solution can produce particles with unprecedented control over their size, shape, crystal structure, composition, and surface chemistry. However, to date, most works have focused only on the low-cost benefits of this strategy. In this perspective, we first cover the opportunities that solution processing of the powder offers, emphasizing the potential structural features that can be controlled by precisely engineering the inorganic core of the particle, the surface, and the organization of the particles before consolidation. We then discuss the challenges of this synthetic approach and more practical matters related to solution processing. Finally, we suggest some good practices for adequate knowledge transfer and improving reproducibility among different laboratories.

show abstract

“…Bismuth was selected for doping because of low carrier density, non-toxic and cost-effective nature. As compared to other metal dopants bismuth possesses several advantages like significant band gap reduction (Estrada-Flores et al, 2022), can cause degradation under both UV and visible light (Mageswari et al, 2013), H 2 production under dark conditions (Sayed et al, 2020), enhancing the catalytic properties of ZnO (Kazmi et al, 2020), enhancing the conductivity and suppression of bipolar conduction (Sharma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Fast and efficient photocatalytic degradation of Brilliant blue dye, under solar light irradiation, with bismuth doped ZnO.

Alamzeb,

Faryad,

Ullah

et al. 2023

Preprint

View full text Add to dashboard Cite

Brilliant blue dye (BB) is being extensively used in textile and cosmetic industries. Recently BB has been reported to be carcinogenic and asthma causing agent. Hence, its use has been banned in several European countries. During the current study ZnO and Bi-ZnO were synthesized by using sol-gel method. The synthesized catalysts were characterized by x-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), energy dispersive x-ray spectroscopy (EDX), and Brunauer-Emmett-Teller surface area analysis (BET). Both ZnO and Bi-ZnO were used for the photocatalytic degradation of BB under solar light irradiation. Different parameters affecting the photocatalytic degradation of BB like contact time, dye concentration, catalyst concentration, and pH were evaluated and optimized. Both catalysts degraded BB efficiently but Bi-ZnO displayed better degradation potential (maximum 92 %) than ZnO (maximum 76 %). The band gap for ZnO and Bi-ZnO was found to be 3.10 and 2.95 eV, respectively. Surface area and pore size for ZnO and Bi-ZnO were determined to be 104.03 m /g and 199 nm, and 114.67 m /g and 203 nm, respectively. Kinetics analysis of the experimental data revealed that the photocatalytic degradation of BB followed pseudo-first-order kinetics (R = 0.9581). The value of first order rate constant (k ) was found to be 3.14 x 10 min . The results of the scavenging studies indicated that superoxide radicals ( O ) and hydroxyl radicals ( OH) produced by Bi-ZnO are mainly responsible for the degradation of BB. Finally, the current field challenges are presented, along with widely applied recommendations and detailed concluding remarks.

show abstract

Effect of bismuth doping and SiC nanodispersion on the thermoelectric properties of solution-processed PbTe

Cited by 4 publications

References 31 publications

High‐Performance Te‐Doped PbSe Film Heterojunction Photodetector with Current Rectification Effect and Broadband Detection Capability

High‐Performance Te‐Doped PbSe Film Heterojunction Photodetector with Current Rectification Effect and Broadband Detection Capability

Solution-Processed Inorganic Thermoelectric Materials: Opportunities and Challenges

Fast and efficient photocatalytic degradation of Brilliant blue dye, under solar light irradiation, with bismuth doped ZnO.

Contact Info

Product

Resources

About