Ultra-flexible organic-inorganic hybrid Bi2Te3 thin films for thermoelectric generators

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Acta Materialia Pub Date : 2025-03-24 DOI:10.1016/j.actamat.2025.120971

Dong Yang , Ning Chen , Mohammad Nisar , Zilong Zhang , Fu Li , Mazhar Hussain Danish , Hongli Ma , Guangxing Liang , Xianghua Zhang , Yue-Xing Chen , Zhuang-Hao Zheng

{"title":"Ultra-flexible organic-inorganic hybrid Bi2Te3 thin films for thermoelectric generators","authors":"Dong Yang , Ning Chen , Mohammad Nisar , Zilong Zhang , Fu Li , Mazhar Hussain Danish , Hongli Ma , Guangxing Liang , Xianghua Zhang , Yue-Xing Chen , Zhuang-Hao Zheng","doi":"10.1016/j.actamat.2025.120971","DOIUrl":null,"url":null,"abstract":"<div><div>Achieving high thermoelectric (TE) performance and flexibility is essential for wearable electronics. Here, an organic-inorganic hybrid strategy incorporating methylammonium lead iodide (MAPbI3) into Bi2Te3 thin films enhances both TE and mechanical properties. Pb/I incorporate into Bi2Te3 lattice, improving electrical conductivity via enhanced carrier transport and moderate doping effects. Meanwhile, amorphous phases derived from MA-related species strengthen phonon scattering, reducing κl+κbi from 1.1 Wm-1K-1 to 0.1 Wm-1K-1. As a result, the zT value improves from 0.08 to 0.94 at 250 °C. Moreover, the amorphization effect induced by the amorphous inclusions enhances flexibility by reducing the Young's modulus, yielding a resistance change of <7 % (ΔR/R0) after bending. Specifically, the 0.6 wt. % sample exhibits only a 2.5 % resistance change after 5000 bending cycles. Finally, a flexible TE generator fabricated with hybrid films and Ag electrodes delivers a high output power of 35.3 nW under a 20 °C temperature gradient, highlighting the potential of this hybrid approach for wearable electronics.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"290 ","pages":"Article 120971"},"PeriodicalIF":8.3000,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359645425002629","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Achieving high thermoelectric (TE) performance and flexibility is essential for wearable electronics. Here, an organic-inorganic hybrid strategy incorporating methylammonium lead iodide (MAPbI₃) into Bi₂Te₃ thin films enhances both TE and mechanical properties. Pb/I incorporate into Bi₂Te₃ lattice, improving electrical conductivity via enhanced carrier transport and moderate doping effects. Meanwhile, amorphous phases derived from MA-related species strengthen phonon scattering, reducing κ_l+κ_bi from 1.1 Wm^-1K^-1 to 0.1 Wm^-1K^-1. As a result, the zT value improves from 0.08 to 0.94 at 250 °C. Moreover, the amorphization effect induced by the amorphous inclusions enhances flexibility by reducing the Young's modulus, yielding a resistance change of <7 % (ΔR/R₀) after bending. Specifically, the 0.6 wt. % sample exhibits only a 2.5 % resistance change after 5000 bending cycles. Finally, a flexible TE generator fabricated with hybrid films and Ag electrodes delivers a high output power of 35.3 nW under a 20 °C temperature gradient, highlighting the potential of this hybrid approach for wearable electronics.

Abstract Image

查看原文本刊更多论文

热电发电机用超柔性有机-无机杂化Bi2Te3薄膜

实现高热电（TE）性能和灵活性对可穿戴电子产品至关重要。在这里，将甲基碘化铅（MAPbI3）掺入Bi2Te3薄膜的有机-无机杂化策略提高了TE和机械性能。Pb/I掺入Bi2Te3晶格中，通过增强载流子输运和适度掺杂效应改善电导率。同时，ma相关物质产生的非晶相增强了声子散射，使κl+κbi从1.1 Wm-1K-1降低到0.1 Wm-1K-1。在250℃时，zT值由0.08提高到0.94。此外，非晶夹杂引起的非晶化效应通过降低杨氏模量来增强柔韧性，使弯曲后的电阻变化<；7% （ΔR/R0）。具体来说，0.6 wt.%的样品在5000次弯曲循环后仅表现出2.5%的电阻变化。最后，一种由混合薄膜和银电极制成的柔性TE发生器在20°C的温度梯度下可提供35.3 nW的高输出功率，突出了这种混合方法在可穿戴电子产品中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Acta Materialia 工程技术-材料科学：综合

CiteScore

16.10

自引率

8.50%

发文量

801

审稿时长

53 days

期刊介绍： Acta Materialia serves as a platform for publishing full-length, original papers and commissioned overviews that contribute to a profound understanding of the correlation between the processing, structure, and properties of inorganic materials. The journal seeks papers with high impact potential or those that significantly propel the field forward. The scope includes the atomic and molecular arrangements, chemical and electronic structures, and microstructure of materials, focusing on their mechanical or functional behavior across all length scales, including nanostructures.