Direct Observation of Dipole Influence Induced by a Spin Coated Organic Interfacial Layer on Effective Schottky Barrier Height Modulation of Hg/Si Contact

Author

Jian-Chi Zhang ; Yu-Long Jiang ; Guo-dong Zhu ; Guo-Ping Ru ; Bing-Zong Li

Author_Institution

Sch. of Microelectron., Fudan Univ., Shanghai, China

Volume

35

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

262

Lastpage

264

Abstract

A thin organic interfacial layer fabricated by a spin coating method based on 80% ethoxylated polyethylenimine (PEIE) solution is demonstrated to be able to effectively modulate the Schottky barrier height (SBH) of Hg/Si contact. A 0.28 eV reduction of effective electron affinity for the PEIE coated Si is observed by Kelvin probe measurement, which directly reveals the dipole influence induced by the PEIE layer. Capacitance-voltage and current-voltage measurements further demonstrate that the SBH modulation is dominated by the interlayer dipole effect.

Keywords

Schottky barriers; capacitance measurement; electric current measurement; electrical contacts; electron affinity; mercury (metal); organic compounds; silicon; spin coating; voltage measurement; Hg-Si; Hg-Si contact; Kelvin probe measurement; PEIE solution; Schottky barrier height modulation; capacitance-voltage measurements; current-voltage measurements; dipole influence; electron affinity; ethoxylated polyethylenimine solution; spin coated organic interfacial layer; spin coating; thin organic interfacial layer; Mercury (metals); Modulation; Probes; Schottky barriers; Silicon; Substrates; Organic interfacial layer; Schottky barrier; dipole effect;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2013.2294715

Filename

6691923