Modeling of V graded In(x)Ga(1-x)N solar cells: comparison of strained and relaxed features

The optical properties of V graded InGaN solar cells are studied. Graded InGaN well structures with the indium composition increasing then decreasing in a V shaped pattern have been designed. Through polarization doping, this naturally creates alternating p-type and n-type regions. Separate structur...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2022-02
Main Authors: Sarollahi, Mirsaeid, Mohammad Zamani Alavijeh, Allaparthi, Rohith, Alhelais, Reem, Refaei, Malak A, Md Helal Uddin Maruf, Ware, Morgan E
Format: Article
Language:English
Subjects:
Composition
Indium
Indium base alloys
Indium gallium nitrides
Optical properties
Parameters
Photovoltaic cells
Solar cells
Thickness
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The optical properties of V graded InGaN solar cells are studied. Graded InGaN well structures with the indium composition increasing then decreasing in a V shaped pattern have been designed. Through polarization doping, this naturally creates alternating p-type and n-type regions. Separate structures are designed by varying the indium alloy profile from GaN to maximum indium concentrations ranging from 20% to 80%, while maintaining a constant overall structure thicknesses of 100 nm. The solar cell parameters under fully strained and relaxed conditions are considered. The results show that a maximum efficiency of 5.5%, under fully strained condition occurs at x=60%. Solar cell efficiency under relaxed conditions increases to a maximum of 8.3% at 90%. While Vegards law predicts the bandgap under relaxed conditions, a Vegard like law is empirically determined from the output of Nextnano for varying In compositions in order to calculate solar cell parameters under strain.
ISSN:2331-8422