On the Air Stability of n-Channel Organic Field-Effect Transistors: A Theoretical Study of Adiabatic Electron Affinities of Organic Semiconductors

被引：139

作者：

Chang, Yu-Chang ^{[1
]}

Kuo, Ming-Yu ^{[2
]}

Chen, Chih-Ping ^{[1
]}

Lu, Hsiu-Feng ^{[1
]}

Chao, Ito ^{[1
]}

机构：

[1] Acad Sinica, Inst Chem, Taipei 11529, Taiwan

[2] Natl Chi Nan Univ, Dept Appl Chem, Nantou 545, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 26期

关键词：

THIN-FILM TRANSISTORS; POLYCYCLIC AROMATIC-HYDROCARBONS; DENSITY-FUNCTIONAL THEORY; DIIMIDE SEMICONDUCTORS; PERFORMANCE; MOBILITY; CORE; NAPHTHALENE; TRANSPORT; ANTHRACENE;

D O I：

10.1021/jp1025625

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In an air-stable n-channel organic field-effect transistor (OFET), the charge carrier (i.e., the radical anion of an organic semiconductor (OSC)) has to be stable enough against ambient oxidants such as O-2 and H2O. It has been suggested that OSCs with large enough electron affinity (EA) will possess air-stable charge carriers, but extensive correlation between air stability and EA has not been established. We have studied 47 existing n-channel OSCs with different molecular core structures and device configurations. A correlation between calculated adiabatic EA and air stability was established, and the threshold value found at the B3LYP/6-31+G*//B3LYP/6-31G** level for air stability was ca. 2.8 eV. This information provides a foundation for theoretical screening of potential n-channel OFETs before their synthesis and facilitates the discussion of the complex device degradation mechanism. Analysis of EAs of derivatives of perylenetetracarboxylic diimide (PDI) and naphthalenetetracarboxylic diimide (NDI) also sheds light on the roles of various substituents.

引用

页码：11595 / 11601

页数：7

共 67 条

[1] n-Type organic field-effect transistors with very high electron mobility based on thiazole oligomers with trifluoromethylphenyl groups [J].