Organic thin-film transistors in sandwich configuration

被引：129

作者：

Zhang, J ^{[1
]}

Wang, J ^{[1
]}

Wang, HB ^{[1
]}

Yan, DH ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 01期

关键词：

D O I：

10.1063/1.1638634

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Organic thin-film transistors (OTFTs) having source/drain electrodes sandwiched between copper phthalocyanine (CuPc) and cobalt phthalocyanine (CoPc) layers, CuPc/CoPc SC OTFTs, are investigated. Comparing their properties with that of CuPc-based top-contact OTFT, field-effect mobility increases from 0.04 to 0.11 cm(2)/Vs, threshold voltage shifts from -13.8 to -8.9 V, and the current on/off ratio maintains at a level of 10(5). A top-contact OTFT with a layer of CuPc and a layer of CoPc (10%)-CuPc mixture reveals that the combination of CuPc and CoPc enhances charge injection from the source electrode into the active layer and increases the off-state current. The sandwich configuration increases the field-effect mobility, reduce the threshold voltage, and improve the on/off ratio at the same time. Our results indicate that using a double-layer of active organic materials in sandwich configuration is an effective way to improve OTFT performance. (C) 2004 American Institute of Physics.

引用

页码：142 / 144

页数：3

共 15 条

[1] Highly ordered vacuum-deposited thin films of metallophthalocyanines and their applications in field-effect transistors [J].