HYDROGEN DIFFUSION IN
INDIUM OXIDE
Hui Xu
ABSTRACT
Hydrogen is an n-type dopant in
In2O3, a conducting oxide. Hydrogen is an important source of n-type
conductivity in In2O3 and has been shown by studies to be a shallow donor.1
Using data from an IR absorption experiment2 that studied a vibrational line at
3306cm-1 using Fourier Transform InfraRed spectrometry, hydrogen’s diffusivity
is examined in this work. Hydrogen’s diffusivity is studied through its
in-diffusion and out-diffusion in In2O3 single crystals3 . The diffusion
process has been simulated in Python language by solving Fick’s second law with
the appropriate boundary conditions. Hydrogen in-diffusion data was fitted
using Scipy4 curve fit function. Fick’s second law, a second-order partial differential
equation, has been solved using Fipy5 , a partial differential equation (PDE)
solver written in Python. The simulation result was then fitted to published
experimental data3 through regression and error analysis to determine the
diffusivity of Hi+ in In2O3.
KEYWORDS
Diffusion, hydrogen, temperature, oxide
Full Text: https://airccse.com/adeij/papers/3120adeij02.pdf