Wenjing Liu , Yao Lu , Jianmin Yang , Dasha Mao , Yi Huang , Fei Wang
{"title":"Preparation of high-performance Ag2Se thermoelectric films and devices for wearable energy harvesting","authors":"Wenjing Liu , Yao Lu , Jianmin Yang , Dasha Mao , Yi Huang , Fei Wang","doi":"10.1016/j.materresbull.2025.113650","DOIUrl":null,"url":null,"abstract":"<div><div>Owing to the high thermoelectric (TE) performance near room temperature, Ag<sub>2</sub>Se has been recognized as a potential alternative to Bi<sub>2</sub>Te<sub>3</sub> for self-powered wearable electronics. Herein, we report a novel template-assisted approach using Ag NWs to synthesize Ag<sub>2</sub>Se nanowires (NWs), yielding more uniform morphology compared to Se NW-templated methods. This approach enables the fabrication of dense, thickness-controlled films with exceptional TE performance, reaching a power factor of 2011 μW/mK<sup>2</sup> at 390 K. Moreover, the film demonstrates excellent flexibility and stability. Specifically, the electrical conductivity remains 92 % after 2000 bending cycles, and 95 % after 360 days without encapsulation. This outstanding flexibility stems from the synergy between the nylon substrate and the Ag<sub>2</sub>Se porous nanostructured film. A flexible TE device assembled by the films achieves a high power density of 7.3 W/m<sup>2</sup> at a temperature difference of 32 K. We also explore potential applications of our flexible TE devices in solar-TE conversion.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113650"},"PeriodicalIF":5.3000,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0025540825003575","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Owing to the high thermoelectric (TE) performance near room temperature, Ag2Se has been recognized as a potential alternative to Bi2Te3 for self-powered wearable electronics. Herein, we report a novel template-assisted approach using Ag NWs to synthesize Ag2Se nanowires (NWs), yielding more uniform morphology compared to Se NW-templated methods. This approach enables the fabrication of dense, thickness-controlled films with exceptional TE performance, reaching a power factor of 2011 μW/mK2 at 390 K. Moreover, the film demonstrates excellent flexibility and stability. Specifically, the electrical conductivity remains 92 % after 2000 bending cycles, and 95 % after 360 days without encapsulation. This outstanding flexibility stems from the synergy between the nylon substrate and the Ag2Se porous nanostructured film. A flexible TE device assembled by the films achieves a high power density of 7.3 W/m2 at a temperature difference of 32 K. We also explore potential applications of our flexible TE devices in solar-TE conversion.
期刊介绍:
Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.