纳米复合热电材料研究进展

doi:10.3724/SP.J.1077.2010.00561

摘要/Abstract

摘要： 低维化和纳米化实现电、声输运特性的协同调控从而优化热电性能是当前热电材料领域的一个重要研究方向. 通过外混、原位复合等方式引入的纳米颗粒能散射具有中长波波长的声子从而降低材料的晶格热导率, 同时纳米化有助于载流子在费米能级附近态密度的提高, 纳米颗粒构成的界面所产生的界面势垒能有效过滤低能量载流子, 从而增大赛贝克系数. 纳米颗粒的含量、分散状态以及颗粒本征性质是设计高性能纳米复合热电材料的关键. 对于不同材料体系, 外部混合、原位氧化、分相析出等制备方法为实现微结构控制提供了可能. 本文以几个典型材料体系为例介绍微结构调控提高材料热电性能的研究进展, 并讨论微结构调控对电、声输运的影响机制.

关键词: 微结构, 纳米复合, 散射, 综述

Abstract: Microstructure engineering is an effective avenue for tuning the thermal and electrical transports to op-timize thermoelectric (TE) properties. Thermoelectric composites with nano-particle dispersion have been success-fully developed by using extrinsic or in-situ formation methods. The lattice thermal conductivity can be depressed by the scattering effects of nano particles to the medium-long-wavelength phonons. The enhanced electron density of states at the Fermi level and the carrier filtering effects caused by the nano-sized grain boundary are also positive for enhancing Seebeck coefficients. The mixing, in-situ oxidation and phase-separation precipitation process supply possibility to realize the nano-particle dispersed structure for different material systems. This paper reviews the re-cent progress of the research on nano-structured and nano-composite thermoelectric materials. The effects of the nano-dispersion on the electrical and thermal transports will be also discussed.

Key words: thermoelectric, microstructure, nano-composite, scattering, review

中图分类号:

TQ174

陈立东, 熊震, 柏胜强. 纳米复合热电材料研究进展[J]. 无机材料学报, 2010, 25(6): 561-568.

CHEN Li-Dong, XIONG Zhen, BAI Sheng-Qiang. Recent Progress of Thermoelectric Nano-composites[J]. Journal of Inorganic Materials, 2010, 25(6): 561-568.

参考文献

[1]Ioffe A F. Goldsmid H J, ed. Semiconductor Thermoelements and Thermoelectric Cooling. London:Inforesearch, 1957: 72.

[2]Slack G A. Rowe D M, ed. CRC Handbook of Thermoelectrics. Boca Raton:CRC Press,1995, chap. 34, 40.

[3]Hicks L D, Dresselhaus M S. Effect of quantum-well structures on the thermoelectric figure of merit.Phys. Rev. B

[4]Hicks L D, Dresselhaus M S. Thermoelectric figure of merit of a one-dimensional conductor. Phys. Rev. B

[5]Hicks L D, Harman T C, Sun X, et al. Experimental study of the effect of quantum-well structures on the thermoelectric figure of merit. Phys. Rev. B, 1996, 53(16): R10493-R10496.

[6]Wu Y, Fan R, Yang P. Block-by-block growth of single-crystalline Si/SiGe superlattice nanowires.Nano Lett,2002, 2(2):83-86

[7]Yang R, Chen G, Dresselhaus M S. Thermal conductivity of simple and tubular nanowire composites in the longitudinal direction.Phys. Rev. B

[8] Hochbaum A I, Chen R, Delgado R D, et al. Enhanced thermoelectric performance of rough silicon nanowires.Nature,2008, 451(7175):163-167

[9] Yang R, Chen G, Dresselhaus M S. Thermal conductivity modeling of core-shell and tubular nanowires.Nano Lett,2005, 5(6):1111-1115

[10] Wang W, Zhang G, Li X. Manipulating growth of thermoelectric Bi2Te3/Sb multilayered nanowire arrays.J. Phys. Chem. C,2008, 112(39):15190-15194

[11] Yoo B, Xiao F, Bozhilov K N, et al. Electrodeposition of thermoelectric superlattice nanowires.Adv. Mater,2007, 19(2):296-299

[12] Trahey L, Becker C R, Stacy A M. Electrodeposited bismuth telluride nanowire arrays with uniform growth fronts.Nano Lett,2007, 7(8):2535-2539

[13] Bj?rk M T, Ohlsson B J, Sass T, et al. One-dimensional steeplechase for electrons realized.Nano Lett,2002, 2(2):87-89

[14]Cho S, Kim Y, Youn S J, et al. Artificially ordered Bi/Sb superlattice alloys: fabrication and transport properties.Phys. Rev. B

[15] Kwon S D, Ju B K, Yoon S J, et al. Fabrication of bismuth telluride-based alloy thin film thermoelectric devices grown by metal organic chemical vapor deposition.J. Electron. Mater,2009, 38(7):920-924

[16] Faraji L S, Singh R P, Allahkarami M. Pulsed laser deposition of bismuth telluride thin film and annealing effects.Eur. Phys. J. Appl. Phys,2009, 46(2):20501-1

[17] Venkatasubramanian R, Siivola E, Colpitts T, et al. Thin-film thermoelectric devices with high room-temperature figures of merit.Nature,2001, 413(6856):597-602

[18] Caylor J C, Coonley K, Stuart J, et al. Enhanced thermoelectric performance in PbTe-based superlattice structures from reduction of lattice thermal conductivity.Appl. Phys. Lett,2005, 87(2):023105-1

[19] Beyer H, Nurnus J, B?tner H, et al. High thermoelectric figure of merit ZT in PbTe and Bi2Te3-based superlattices by a reduction of the thermal conductivity.Phys. E,2002, 13(2/3/4):965-968

[20] Harman T C, Taylor P J, Walsh M P, et al. Quantum dot superlattice thermoelectric materials and devices.Science,2002, 297(5590):2229-2232

[21] Koh Y K, Vineis C J, Calawa S D, et al. Lattice thermal conductivity of nanostructured thermoelectric materials based on PbTe.Appl. Phys. Lett,2009, 94(15):153101-1

[22] Uchino H, Okamoto Y, Kawahara T, et al. The study of the origin of the anomalously large thermoelectric power of Si/Ge superlattice thin film.Jpn. J. Appl. Phys,2000, 39(4A):1675-1677

[23] Walther M, Cooke D G, Sherstan C, et al. Terahertz conductivity of thin gold films at the metal-insulator percolation transition.Phys. Rev. B,2007, 76(12):125408-1

[24] Burkov A T, Heinrich A, Gladun C, et al. Effect of interphase boundaries on resistivity and thermopower of nanocrystalline Re-Si thin film composites.Phys. Rev. B,1998, 58(15):9644-9647

[25] Liufu S C, Chen L D, Yao Q, et al. Assembly of one-dimensional nanorods into Bi2S3 films with enhanced thermoelectric transport properties.Appl. Phys. Lett,2007, 90(11):112106-1

[26] Kim I H. (Bi,Sb)2(Te,Se)3-based thin film thermoelectric generators.Mater. Lett,2000, 43(5/6):221-224

[27]Goldsmid H J. Rowe D M, ed. CRC Handbook of Thermoelectrics. Boca Raton:CRC Press, 1995

[28] Li H, Tang X, Zhang Q, et al. High performance InxCeyCo4Sb12 thermoelectric materials with in situ forming nanostructured InSb phase.Appl. Phys. Lett,2009, 94(10):102114-1

[29] Ma Y, Hao Q, Poudel B, et al. Enhanced thermoelectric figure- of-merit in p-type nanostructured bismuth antimony tellurium alloys made from elemental chunks.Nano Lett,2008, 8(8):2580-2584

[30] Heremans J P, Jovovic V, Toberer E S, et al. Enhancement of thermoelectric efficiency in PbTe by distortion of the electronic density of states.Science,2008, 321(5888):554-557

[31] Heremans