Compensation of Zn substitution and secondary phase controls effective mass and weighted mobility in In and Ga co-doped ZnO material

作     者：Oanh Kieu Truong Le Anh Tuan Thanh Pham Ngoc Kim Pham Trang Huyen Cao Pham Truong Huu Nguyen Dung Van Hoang Hanh Kieu Thi Ta Dai Cao Truong Hoa Thi Lai Thuy Dieu Thi Ung Vinh Cao Tran Thang Bach Phan 

作者机构：aboratory of Advanced MaterialsUniversity of ScienceHoChiMinh City700000Viet Nam Vietnam National UniversityHoChiMinh City700000Viet Nam Faculty of Physics and Engineering PhysicsUniversity of ScienceHoChiMinh City700000Viet Nam Faculty of Materials Science and TechnologyUniversity of ScienceHoChiMinh City700000Viet Nam Center for Innovative Materials and Architectures(INOMAR)HoChiMinh CityViet Nam Institute of Materials ScienceVietnam Academy of Science and TechnologyHanoi100000Viet Nam 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2021年第7卷第4期

页      面：742-755页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the Vietnam Ministry of Science and Technology under grant numberÐTÐL.CN-23/18 

主　　题：Thermoelectrics In and Ga co-Doped ZnO Secondary phase Zn substitution DOS effective Mass Weighted mobility 

摘      要：Conductivity s and thermal conductivity k are directly related to carrier concentration while Seebeck coefficient S is inversely proportional to carrier ***,improving thermoelectric(TE)performance is ***,the first-time analysis of secondary phase-controlled TE performance in terms of density-of-state effective mass m*d,weighted mobility mw and quality factor B is discussed in ZnO *** results show that the secondary spinel phase Ga2O_(3)(ZnO)9 not only impacts on k but also on s and S at high temperature,while the effect of carrier concentration seem to be dominant at low *** the high-spinel-segregation sample,a compensation of dopant atoms from the spinel to substitutional sites in the ZnO matrix at high temperature leads to a low decreased rate of temperaturedependent m**** compensation process also induces a band sharpening,a small mw reduction,and a large B *** a result,In and Ga co-doped ZnO bulk with the highest spinel segregation achieves the greatest PF improvement by 112.8%,owing to enhanced Seebeck coefficient by 110%as compared to the good Zn-substitution sample.