DataVXACS Applied Energy MaterialsPaper
journal article·2025-09-22

High-Performance Flexible Thermoelectric Generator via Rapid Evaporation of Nanocrystalline Bi2Te3-Alloy Films

Varun Thottathil Sasi, Sochannao Machinao, Rasmi Thushara, Anoop Anchara Veettil, Devarajan Alagarasan, Vijayeta Pal, Malini Kalappattil Aravindan, Bhuvanesh Srinivasan, Ramesh Karuppannan, Subash Chandra Bose Rapaka

ACS Applied Energy Materials· Volume 8· Issue 18
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Source abstract

Abstract

We demonstrate a high-performance flexible thermoelectric generator (FTEG) using nanocrystalline p -type Bi 0.5 Sb 1.5 Te 3 and n -type Bi 2 Te 2.7 Se 0.3 films deposited on polymer (PET) via rapid thermal evaporation (RTE) at room temperature. Without any annealing, these ∼1 μm films reach power factors of ∼1.5 and ∼1.2 mW·m –1 ·K –2 at 200 °C─among the highest for flexible Bi 2 Te 3 -based films. A 10-couple device yields ∼61 mV (446 nW) at ΔT = 25 °C and ∼13 mV at ∼10 °C on skin, demonstrating viable body-heat harvesting. RTE involves no high-temperature steps and is compatible with scalable, low-cost fabrication of wearable power sources.
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Research context

Metals & alloysPolymersNanomaterialsMaterials processing

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Heat Transfer and Optimization · Advanced Thermodynamics and Statistical Mechanics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Aerogel Group

Centre for Materials for Electronics Technology

Department of Physics

Indian Institute of Science

Vimala College (Autonomous)

Nano Materials and Device Laboratory, School of Materials Science and Engineering

National Institute of Technology

School of Materials Science and Technology

I-DAPT, Indian Institute of Technology (BHU)

Department of Metallurgical and Materials Engineering

Indian Institute of Technology Madras (IIT-Madras)

Funding

Indian Institute of Technology Madras · Ministry of Electronics and Information technology · Science and Engineering Research Board

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