NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Frequency response of the external quantum efficiency in multijunction solar cells

Published

Author(s)

Nicolas Marquez Peraca, D T. Bilir, Behrang Hamadani

Abstract

The frequency dependence of the external quantum efficiency (EQE) of high-quality multijunction solar cells was examined by the modulated photocurrent spectroscopy method via an optical setup comprised of a light-pipe-coupled compact LED array. The optical excitation was achieved through sinusoidal electrical modulation of an appropriate LED by a custom-designed, high bandwidth amplifier. We observed very unique features in the amplitude and phase data of the EQE frequency sweeps that are very sensitive to various subcell parameters. These features are discussed extensively within the context of an AC equivalent circuit model.
Citation
Optics Express
Volume
25
Issue
16
Pub Type
Journals

Download Paper

DOI Link

Keywords

multijunction solar cell, PV, Photovoltaics, quantum efficiency, modulated photocurrent
Physics, Optical physics and communications, Optical / photometry / laser metrology, Energy and Alternative energy

Citation

Marquez Peraca, N. , Bilir, D. and Hamadani, B. (2017), Frequency response of the external quantum efficiency in multijunction solar cells, Optics Express, [online], https://doi.org/10.1364/OE.25.00A709 (Accessed October 11, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created June 28, 2017, Updated October 12, 2021
Was this page helpful?