Dopant controlled trap-filling and conductivity enhancement in an electron-transport polymer

被引：58

作者：

Higgins, Andrew ^{[1
]}

Mohapatra, Swagat K. ^{[2
,3
]}

Barlow, Stephen ^{[2
,3
]}

Marder, Seth R. ^{[2
,3
]}

Kahn, Antoine ^{[1
]}

机构：

[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[2] Georgia Inst Technol, Ctr Organ Photon & Elect, Atlanta, GA 30332 USA

[3] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 16期

基金：

美国国家科学基金会;

关键词：

AIR-STABLE ORGANOMETALLICS; LIGHT-EMITTING-DIODES; ORGANIC SEMICONDUCTORS; SANDWICH COMPOUNDS; 19-ELECTRON; COPOLYMER; INJECTION; LAYERS;

D O I：

10.1063/1.4918627

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Charge transport in organic semiconductors is often inhibited by the presence of tail states that extend into the band gap of a material and act as traps for charge carriers. This work demonstrates the passivation of acceptor tail states by solution processing of ultra-low concentrations of a strongly reducing air-stable organometallic dimer, the pentamethylrhodocene dimer, [RhCp*Cp](2), into the electron transport polymer poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)}, P(NDI2OD-T-2). Variable-temperature current-voltage measurements of n-doped P(NDI2OD-T-2) are presented with doping concentration varied through two orders of magnitude. Systematic variation of the doping parameter is shown to lower the activation energy for hopping transport and enhance film conductivity and electron mobility. (C) 2015 AIP Publishing LLC.

引用

页数：4

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