热电材料
材料科学
热电效应
相容性(地球化学)
能量转换效率
功勋
工程物理
光电子学
功率因数
热电发电机
能量转换
高效能源利用
纳米技术
功率(物理)
电气工程
复合材料
电压
热力学
热导率
工程类
物理
作者
Jin Cao,Xian Yi Tan,Ning Jia,Jie Zheng,Sheau Wei Chien,Hong Kuan Ng,Chee Kiang Ivan Tan,Hongfei Liu,Qiang Zhu,Suxi Wang,Gang Zhang,Kewei Chen,Yupeng Liu,Lei Zhang,Jianwei Xu,Lei Hu,Qingyu Yan,Jing Wu,Ady Suwardi
出处
期刊:Nano Energy
[Elsevier]
日期:2022-06-01
卷期号:96: 107147-107147
被引量:23
标识
DOI:10.1016/j.nanoen.2022.107147
摘要
Over the past decade, thermoelectrics have progressed in leaps and bounds led by advancements in their physical understanding and design. Figure of merit zT exceeding 2 have been consistently reported, especially in GeTe, one of the best medium-temperature thermoelectrics. However, its power conversion efficiency is limited due to its low performance at room temperature. In this work, we report the design and exploration of segmented thermoelectric legs by pairing GeTe with the best room temperature thermoelectric Bi0.5Sb1.5Te3 to achieve extremely high power conversion efficiency of 13.6% between 280 K and 773 K. The high efficiency is achieved by looking beyond simply combining high zT regions to encompass the thermoelectric compatibility factors between dissimilar materials. Our work opens up an avenue for materials design beyond maximizing zT to achieve technologically significant energy harvesting performance in thermoelectrics.
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