@inproceedings{cf711240d43349139c81757137aba86c,
title = "Characterization and quantitative analysis of ultra-thin GaAs single-junction solar cells with reflective back scattering",
abstract = "This paper studies the impacts of the non-ideal reflective back scattering, non-radiative recombination, and series resistance on the device performance of ultra-thin GaAs single-junction solar cells. The reflectivity of the textured AlInP/Au interface is calculated by averaging the angular reflectivity against the Lambertian distribution, the value of which is 95% at the GaAs absorption edge. The impact of non-ideal scattering on short-circuit current density (Jsc) and external quantum efficiency (EQE) is investigated using Phong's distribution and a Phong exponent m of ∼12 is determined by fitting both simulated Jsc and EQE to their experimental values. The measured open-circuit voltage (Voc) is lower than the best achievable value, and the difference is attributed to the non-radiative recombination in the device. Fitting of the measured Voc gives a lifetime of ∼130 ns. The impact of series resistance on fill factor is also studied using the single diode equivalent circuit model and the specific series resistivity of the device is determined to be ∼1.2 ω·cm2.",
keywords = "gallium arsenide, photovoltaic cell, surface texture, thin film devices",
author = "Shi Liu and Weiquan Yang and Jacob Becker and Kuo, {Ying Shen} and Yong-Hang Zhang",
note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; 40th IEEE Photovoltaic Specialist Conference, PVSC 2014 ; Conference date: 08-06-2014 Through 13-06-2014",
year = "2014",
month = oct,
day = "15",
doi = "10.1109/PVSC.2014.6924965",
language = "English (US)",
series = "2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "487--490",
booktitle = "2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014",
}