Metal Electrode Work Function Modification Using Aerosol Jet Printing

Author

Aga, Roberto ; Jordan, Christopher ; Aga, Rachel S. ; Bartsch, Carrie M. ; Heckman, Emily M.

Author_Institution

Wright-Patterson AFB, Air Force Res. Lab., Wright-Patterson AFB, OH, USA

Volume

35

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1124

Lastpage

1126

Abstract

An aerosol jet printer is used to precisely control the deposition in 25 nm increments of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) on an oxygen plasma-treated Ni (O2-Ni) electrode to modify its work function. As revealed by Kelvin probe measurements, the effective work function of the O2-Ni electrode is dependent on the thickness of the PEDOT:PSS coating. By precisely controlling the coating thickness, the effective work function of metal electrodes in polymer-based photodetectors can be tailored for improved device performance. This is verified by demonstrating a threefold increase in the photoresponse of a polymer-based Schottky barrier infrared photodetector.

Keywords

Schottky barriers; aerosols; electrodes; ink jet printing; nickel; oxygen; photodetectors; plasma CVD; polymers; Kelvin probe measurements; O₂-Ni; PEDOT:PSS; aerosol jet printer; aerosol jet printing; coating thickness; metal electrode work function modification; metal electrodes; oxygen plasma-treated electrode; photoresponse; poly(3,4-ethylenedioxythiophene); poly(styrenesulfonate); polymer-based Schottky barrier infrared photodetector; polymer-based photodetectors; size 25 nm; Aerosols; Coatings; Electrodes; Materials; Metals; Printing; Probes; Work function; aerosol jet; electrode;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2014.2355142

Filename

6899597