Enhanced thermoelectric performance of Cu_(2)SnSe_(3) via synergistic effects of Cd-doping and CuGaTe_(2) alloying

作     者：Yi-Jing Fan Kun-Ling Peng Yu-Ling Huang Hui-Jun Liao Zheng-Yong Huang Jian Li Yan-Ci Yan Hao-Shuang Gu Bin Zhang Yong-Ming Hu Xu Lu Xiao-Yuan Zhou Yi-Jing Fan;Kun-Ling Peng;Yu-Ling Huang;Hui-Jun Liao;Zheng-Yong Huang;Jian Li;Yan-Ci Yan;Hao-Shuang Gu;Bin Zhang;Yong-Ming Hu;Xu Lu;Xiao-Yuan Zhou

作者机构：Faculty of Physics and Electronic SciencesHubei Key Laboratory of Ferro and Piezoelectric Materials and DevicesHubei UniversityWuhan430062China College of PhysicsChongqing UniversityChongqing400044China State Key Laboratory of Power Transmission Equipment and System Security and New TechnologyChongqing UniversityChongqing400044China School of ScienceChongqing University of Posts and TelecommunicationsChongqing400065China Analytical and Testing CenterChongqing UniversityChongqing400044China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第10期

页      面：3466-3474页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.11874356, 52071041,12004060,51972102 and 51877023) the Key Research Program of Frontier Sciences,CAS (No.QYZDB-SSW-SLH016) 

主　　题：Cu_(2)SnSe_(3) Synergistic optimization Alloying Quality factor Thermoelectric 

摘      要：In this work,we show significantly enhanced thermoelectric performance in Cu_(2) SnSe_(3) via a synergistic effect of Cd-doping and CuGaTe_(2) alloying in the temperature range of 300-823 *** the electron and phonon transport properties can be simultaneously regulated by Cd doping at Sn site,leading to a higher quality ***,a maximum figure of merit(zT) value of ~0.68 was obtained for Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3) sample at823 K,which is about four times higher than that of the pristine sample(zT=0.18 at 773 K).Furthermore,Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3) was alloyed with CuGaTe_(2) to reduce the lattice thermal conductivity in the high-temperature ***,a further enhanced zT value(0.77,823 K) was achieved in the(Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3))_(0.94)(CuGaTe_(2))_(0.06) sample,with a high average zT(zT_(ave)) value of0.30 between 300 and 823 *** results demonstrate that Cd-doping combined with CuGaTe2 alloying could be an effective method to enhance zT values of Cu_(2) SnSe_(3) based compounds.