吖啶类衍生物的热电材料性能研究  

The Measurement of Thermopower Performance of Acridine Derivatives

作　　者：曾凯 陈志生 林平东 于毅鹏 郑玉玲 ZENG Kai;CHEN Zhi-sheng;LIN Ping-dong;YU Yi-peng;ZHENG Yu-ling(College of life sciences and chemistry,Minnan University of science and technology,Quanzhou 362332,China)

机构地区：[1]闽南科技学院生命科学与化学学院,福建泉州362332

出　　处：《唐山师范学院学报》2023年第3期27-30,共4页Journal of Tangshan Normal University

摘　　要：利用背栅调控技术实现了单分子尺度下感应热电势的直接测量。实验观测到吖啶类衍生物自由基分子在费米能级处热电势的变化,在栅极电压从-2 V变化到+2 V的过程中,分子热电势逐渐从正值变为了负值,表明主导分子电输运的轨道由已占有电子的能级最高的轨道HOMO转化为未占有电子的能级最低的轨道LUMO。The independent temperature measurement and control modules and voltage measurement modules for microvolt-level thermal voltage measurement are established based on the scanning tunneling microscope break junction technique.the phenomenon is observed that the Fermi energy level of acridine derivative molecules can be changed by adjusting the gate voltage on the thermopower measurement of acridine derivatives.The thermopower of the radicals gradually changes from a positive value to a negative value while the gate voltage changes from -2 V to +2 V.It means that the dominant charge transport channel of the molecule is changed from HOMO to LUMO.

关 键 词：热电材料 热电势 热电器件 费米能级 栅极电压 

分 类 号：O624.5[理学—有机化学]