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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.06824 |
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| _version_ | 1866914185573564416 |
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| author | Kashyap, Ankit Wallace, Conner Sharma, Geetu Rowe, Collin Sasikumar, Mahima Singh, Niraj Kumar Eklund, Per Borca-Tasciucc, Theodorian Ramanath, Ganpati Soni, Ajay |
| author_facet | Kashyap, Ankit Wallace, Conner Sharma, Geetu Rowe, Collin Sasikumar, Mahima Singh, Niraj Kumar Eklund, Per Borca-Tasciucc, Theodorian Ramanath, Ganpati Soni, Ajay |
| contents | Harvesting low-grade heat to electricity is attractive for powering wearable electronic devices. Here, we demonstrate nW-scale thermoelectric power generation in devices from thin film assemblies of microwave-synthesized p-Sb2Te3 nanoplates and n-Ag2Te nanowires on polyvinylidene fluoride membranes. While microwave cycling is crucial for Ag2Te nanocrystal shaping, Sb2Te3 formation is sensitive to precursors and surfactant concentrations. Introducing S doping in Sb2Te3 in the 1 - 1.5 atomic percent range via thioglycolic acid during synthesis yields an up to eightfold higher power-factor, due to a fivefold increase in electrical conductivity and 25% increase in Seebeck coefficient. Our microfilm devices generate up to 33.6 mV from 5 deg C to 50 deg C thermal gradients, with 120 nW maximum power output at Delta T 30 deg C, which is sixtyfold higher than Sb2Te3 paper devices. Mechanical bending can increase device resistance by up to 125% due to diminished inter-nanostructure electronic transport. These findings provide insights for integrating synthesis, morphology engineering and device design for next-generation wearable thermoelectric systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_06824 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Morphology-engineered nanostructured silver- and antimony-telluride films for flexible thermoelectric generators Kashyap, Ankit Wallace, Conner Sharma, Geetu Rowe, Collin Sasikumar, Mahima Singh, Niraj Kumar Eklund, Per Borca-Tasciucc, Theodorian Ramanath, Ganpati Soni, Ajay Materials Science Harvesting low-grade heat to electricity is attractive for powering wearable electronic devices. Here, we demonstrate nW-scale thermoelectric power generation in devices from thin film assemblies of microwave-synthesized p-Sb2Te3 nanoplates and n-Ag2Te nanowires on polyvinylidene fluoride membranes. While microwave cycling is crucial for Ag2Te nanocrystal shaping, Sb2Te3 formation is sensitive to precursors and surfactant concentrations. Introducing S doping in Sb2Te3 in the 1 - 1.5 atomic percent range via thioglycolic acid during synthesis yields an up to eightfold higher power-factor, due to a fivefold increase in electrical conductivity and 25% increase in Seebeck coefficient. Our microfilm devices generate up to 33.6 mV from 5 deg C to 50 deg C thermal gradients, with 120 nW maximum power output at Delta T 30 deg C, which is sixtyfold higher than Sb2Te3 paper devices. Mechanical bending can increase device resistance by up to 125% due to diminished inter-nanostructure electronic transport. These findings provide insights for integrating synthesis, morphology engineering and device design for next-generation wearable thermoelectric systems. |
| title | Morphology-engineered nanostructured silver- and antimony-telluride films for flexible thermoelectric generators |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.06824 |