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Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials

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High-Performance Thermoelectrics Based on Solution-Grown SnSe Nanostructures.

Sushmita Chandra¹, Prabir Dutta¹, Kanishka Biswas¹

¹New Chemistry Unit, School of Advanced Materials and International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India.

|December 17, 2021

Summary

This summary is machine-generated.

Nanocrystalline tin selenide (SnSe) offers a scalable and cost-effective alternative to single crystals for thermoelectric applications. Solution-phase synthesis yields SnSe with ultralow thermal conductivity and high thermoelectric performance, paving the way for practical energy conversion.

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Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes

Atmospheric Pressure Fabrication of Large-Sized Single-Layer Rectangular SnSe Flakes

Published on: March 21, 2018

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Two-dimensional layered tin selenide (SnSe) exhibits excellent thermoelectric properties, primarily studied in single crystals.
Single-crystal SnSe synthesis is challenging due to high costs, time, and poor mechanical stability, hindering commercialization.
Nanocrystalline SnSe produced via low-temperature solution-phase synthesis presents a viable alternative for large-scale applications.

Purpose of the Study:

To review the advancements in thermoelectric properties of tin selenide (SnSe), focusing on nanocrystalline forms.
To highlight the advantages of solution-phase synthesis for producing SnSe nanostructures.
To discuss the potential of nanocrystalline SnSe for thermoelectric energy conversion.

Main Methods:

Exploration of various solution-phase synthesis techniques for diverse SnSe nanostructures.
Analysis of thermoelectric properties, including lattice thermal conductivity and figure of merit (ZT).
Investigation of CdSe-coated SnSe nanocomposites synthesized via a unique solution-phase method.

Main Results:

Nanocrystalline SnSe synthesized in solution demonstrates excellent control over grain growth.
Ultralow thermal conductivity in nanocrystalline SnSe is attributed to significant phonon scattering at nanoscale grain boundaries.
A CdSe-coated SnSe nanocomposite achieved a high thermoelectric figure of merit (ZT) of 2.2 at 786 K.

Conclusions:

Solution-phase synthesis is a promising route for scalable, low-temperature production of high-performance thermoelectric SnSe.
Nanocrystalline SnSe offers a pathway to overcome the limitations of single-crystal SnSe for practical thermoelectric devices.
Further research into solution-synthesized nanocrystalline SnSe is crucial for advancing thermoelectric energy conversion technology.