n型掺杂不同管径碳纳米管薄膜的热电性能研究及其器件的制备  

Study on the Thermoelectric Properties of n-type Doped Carbon Nanotube with Different Diameters and the Fabrication of Their Devices

作　　者：晋潞潞 孙婷婷 王连军[1,2] 江莞 JIN Lulu;SUN Tingting;WANG Lianjun;JIANG Wan(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Engineering Research Center of Advanced Glasses Manufacturing Technology,Ministry of Education,Donghua University,Shanghai 201620,China;Institute of Functional Materials,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院,纤维材料改性国家重点实验室,上海201620 [2]东华大学先进玻璃制造技术教育部工程研究中心,上海201620 [3]东华大学功能材料研究所,上海201620

出　　处：《材料导报》2022年第6期52-56,共5页Materials Reports

基　　金：上海市科学技术委员会(18JC1411200)。

摘　　要：碳纳米管(Carbon nanotube,CNT)高的导电性和优异的韧性使其在柔性热电领域具有很多优势,其管径、长度等特征对热电性能具有不同影响,深入探索并揭示该影响对制备高性能CNT热电材料具有指导意义。本工作主要研究了n型掺杂态的不同管径的CNT热电性能。结果表明CNT薄膜的n型掺杂效果随管径增大而降低,管径为1~2 nm,长度为5~30μm的单壁碳纳米管(SWCNT)样品在经20%(质量分数)的聚乙烯亚胺(Polyethyleneimine,PEI)液掺杂12 h后的性能达到最优,其功率因子可达51.5μW·m^(-1)·K^(-2),基于此制备的热电器件在温差为8.3 K时,最大输出功率可达21.5 nW。该研究结果可为CNT热电性能的优化及掺杂提供参考。The high conductivity and excellent toughness of carbon nanotube(CNT)make them have many advantages in the field of flexible thermoelectrics.Their tube diameter,length and other characteristics have different effects on the thermoelectric performance.The insight into the above content plays practice guiding role in preparing high-performance CNT thermoelectric materials.This work mainly studied the thermoelectric properties of n-type doped CNT with different tube diameters.The results showed that the n-type doping effect of CNT film decreased with the increase of tube diameter.Single-walled carbon nanotube(SWCNT)samples with a tube diameter of 1—2 nm and a length of 5—30μm had the best thermoelectric performance after being doped with a 20%(mass fraction)PEI solution for 12 hours,and its power factor can reach 51.5μW·m^(-1)·K^(-2).Based on the optimized thermoelectric materials,a thermoelectric device was fabricated,which had a maximum output power of 21.5 nW when the temperature difference was 8.3 K.The research provides a reference for achieving n-doping effect and optimizing the thermoelectric properties of CNT.

关 键 词：碳纳米管 柔性热电薄膜 热电器件 

分 类 号：TB34[一般工业技术—材料科学与工程]