Simultaneous power generation and cooling using semiconductor-sensitized thermal cells
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912761825460224 |
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| author | Hayashida, Atsushi Saito, Hitoshi Chunxiang, Yang Nishii, Taiga Ishihara, Motokazu Nakamura, Yuta Sunaga, Kento Matsushita, Sachiko |
| author_facet | Hayashida, Atsushi Saito, Hitoshi Chunxiang, Yang Nishii, Taiga Ishihara, Motokazu Nakamura, Yuta Sunaga, Kento Matsushita, Sachiko |
| contents | This manuscript reports a semiconductor-sensitized thermal cell (STC) that converts ambient heat into electrical power while simultaneously reducing its own temperature under isothermal conditions. Using a printable semiconductor--electrolyte architecture, we fabricate $4\,\mathrm{cm} \times 4\,\mathrm{cm}$ devices that generate up to approximately $0.2\,\mathrm{mW}$ at temperatures of $40$--$55\,^\circ\mathrm{C}$. During continuous discharge, the STC exhibits a transient temperature decrease followed by thermal equilibration with the environment. In contrast, periodic on--off discharge produces sustained cooling of approximately $1\,^\circ\mathrm{C}$ relative to a non-discharging reference. Notably, parallel integration of four STCs yields a nonlinear enhancement of cooling (approximately $5\,^\circ\mathrm{C}$) without a corresponding increase in electrical output. The observed behavior can be understood within a macroscopic energy-balance framework, in which time modulation of electrochemical heat consumption prevents the establishment of thermal steady state. These results demonstrate sustained isothermal cooling induced by heat-to-electricity conversion at practical device scales, and highlight semiconductor-sensitized thermal cells as a platform for coupled energy harvesting and thermal management. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_12114 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Simultaneous power generation and cooling using semiconductor-sensitized thermal cells Hayashida, Atsushi Saito, Hitoshi Chunxiang, Yang Nishii, Taiga Ishihara, Motokazu Nakamura, Yuta Sunaga, Kento Matsushita, Sachiko Materials Science Applied Physics Chemical Physics This manuscript reports a semiconductor-sensitized thermal cell (STC) that converts ambient heat into electrical power while simultaneously reducing its own temperature under isothermal conditions. Using a printable semiconductor--electrolyte architecture, we fabricate $4\,\mathrm{cm} \times 4\,\mathrm{cm}$ devices that generate up to approximately $0.2\,\mathrm{mW}$ at temperatures of $40$--$55\,^\circ\mathrm{C}$. During continuous discharge, the STC exhibits a transient temperature decrease followed by thermal equilibration with the environment. In contrast, periodic on--off discharge produces sustained cooling of approximately $1\,^\circ\mathrm{C}$ relative to a non-discharging reference. Notably, parallel integration of four STCs yields a nonlinear enhancement of cooling (approximately $5\,^\circ\mathrm{C}$) without a corresponding increase in electrical output. The observed behavior can be understood within a macroscopic energy-balance framework, in which time modulation of electrochemical heat consumption prevents the establishment of thermal steady state. These results demonstrate sustained isothermal cooling induced by heat-to-electricity conversion at practical device scales, and highlight semiconductor-sensitized thermal cells as a platform for coupled energy harvesting and thermal management. |
| title | Simultaneous power generation and cooling using semiconductor-sensitized thermal cells |
| topic | Materials Science Applied Physics Chemical Physics |
| url | https://arxiv.org/abs/2512.12114 |