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[資源]
Accounts of Chemical Research上刊登中科大的一篇有關(guān)熱電的綜述,值得關(guān)注!
Decoupling Interrelated Parameters for Designing High Performance Thermoelectric Materials
總所周知由于熱電材料中三個參數(shù)的互相耦合使得對熱電材料的性能ZT的優(yōu)化長尾熱電,中科大謝毅教授組在近兩年在通過去耦合以提高熱電材料的ZT值方面做了積極探索,現(xiàn)在ACS著名期刊Accounts of Chemical Research上撰寫了通過去耦合以提高熱電材料的ZT值的綜述文章,也全面介紹了其課題組在這方面做出的相關(guān)探索,有著積極的指導(dǎo)意義!
In this Account, we discuss our recently developed strategies to decouple thermoelectric parameters for the synergistic optimization of electrical and thermal transport. We first highlight the phase transition, which is accompanied by an abrupt change of electrical transport, such as with a metal−insulator and semiconductor−superionic conductor transition. This should be a universal and effective strategy to optimize the thermoelectric performance, which takes advantage of modulated electronic
structure and critical scattering across phase transitions to decouple the power factor and thermal conductivity. We propose that solid-solution homojunction nanoplates with disordered lattices are promising thermoelectric materials to meet the “phonon glass electron crystal” approach. The formation of a solid solution, coupled with homojunctions, allows for synergistically enhanced thermoelectric properties. This occurs through a significant reduction of thermal conductivity, without the
deterioration of thermopower and electrical conductivity. In addition, we introduce the concept of spin entropy in wide band gap semiconductor nanocrystals, which acts to fully disentangle the otherwise interconnected quantities for synergistically optimized thermoelectric performance. Finally, we discuss a new concept we developed that is based on an ultrathin nanosheet composite that we fabricated from ultrathin nanosheets of atomic thickness. These retain the original strong two-dimensional electron gas (2DEG) and allow for decoupled optimization of the three thermoelectric parameters, which improves thermoelectric performance![Accounts of Chemical Research上刊登中科大的一篇有關(guān)熱電的綜述,值得關(guān)注!]()
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[ Last edited by 牛小問 on 2014-2-15 at 20:01 ] |
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