Title :
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
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;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2014.2355142
