In situ crystal-amorphous compositing inducing ultrahigh thermoelectric performance of p-type Bi0.5Sb1.5Te3 hybrid thin films
Article
Article Title | In situ crystal-amorphous compositing inducing ultrahigh thermoelectric performance of p-type Bi0.5Sb1.5Te3 hybrid thin films |
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ERA Journal ID | 201288 |
Article Category | Article |
Authors | Tan, Ming (Author), Liu, Wei-Di (Author), Shi, Xiao-Lei (Author), Shang, Jin (Author), Li, Hui (Author), Liu, Xiaobao (Author), Kou, Liangzhi (Author), Dargusch, Matthew (Author), Deng, Yuan (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Nano Energy |
Journal Citation | 78 |
Article Number | 105379 |
Number of Pages | 32 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 2211-2855 |
2211-3282 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.nanoen.2020.105379 |
Abstract | Flexible Bi0.5Sb1.5Te3-based thermoelectric thin films are promising p-type candidates for applications in flexible and wearable electronics. Here, we use thermal evaporation deposition and subsequent post-annealing treatment to prepare Bi0.5Sb1.5Te3 crystal-amorphous hybrid thin films. Tuning the annealing temperature can achieve an optimized hybrid level between amorphous and crystalline Bi0.5Sb1.5Te3, leading to an optimized figure of merit as high as ∼1.5 at room temperature, which is an ultrahigh value in the p-type Bi0.5Sb1.5Te3 thin films. Our single parabolic band model and Density-Functional Theory calculation results indicate that such a high value should be attributed to the high effective mass induced by the proper crystal-amorphous hybrid structure. Our study indicates that a crystal-amorphous compositing can be used as a new methodology to achieve ultrahigh performance in thermoelectric materials. |
Keywords | thermoelectric performance, film, Bi0.5Sb1.5Te3, amorphous, crystallinity |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Henan Agricultural University, China |
Centre for Future Materials | |
Queensland University of Technology | |
University of Queensland | |
Beihang University, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5y45/in-situ-crystal-amorphous-compositing-inducing-ultrahigh-thermoelectric-performance-of-p-type-bi0-5sb1-5te3-hybrid-thin-films
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