Understanding electrical-thermal transport characteristics of organic semiconductors: Violation of Wiedemann-Franz law

被引：13

作者：

Lu, Nianduan ^{[1
,2
]}

Li, Ling ^{[1
,2
]}

Gao, Nan ^{[1
,2
]}

Liu, Ming ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Microelect, Key Lab Microelect Devices & Integrated Technol, 3 Bei Tu Cheng West Rd, Beijing 100029, Peoples R China

[2] Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 210009, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 120卷 / 19期

基金：

中国国家自然科学基金;

关键词：

THERMOELECTRIC-MATERIALS; DISORDERED-SYSTEMS; CHARGE-TRANSPORT; CONDUCTIVITY; POLYMERS; MODEL;

D O I：

10.1063/1.4967997

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Organic semiconductors exhibit plenty of attractive properties for use as thermoelectric elements. A comprehensive understanding for the electrical-thermal transport characteristics is crucial to design and fabricate the thermoelectric device. We proposed a theoretical model to investigate the electrical conductivity and the electronic thermal conductivity of organic semiconductors based on the hopping transport mechanism. The electrical-thermal transport characteristics of organic semiconductors have been analyzed in detail and compared with the experimental results and Monte Carlo simulation. The Wiedemann-Franz law, connecting the electronic thermal conductivity to the electrical conductivity of organic semiconductors, is generally found to be strongly violated under the effect of temperature, carrier concentration, energetic disorder and electric field. Published by AIP Publishing.

引用

页数：6