Bulk measurement of copper and sodium content in CuIn(0.7)Ga(0.3)Se(2) (CIGS) solar cells with nanosecond pulse length laser induced breakdown spectroscopy (LIBS)

In this work, we show that laser induced breakdown spectroscopy (LIBS) with a nanosecond pulse laser can be used to measure the copper and sodium content of CuIn(0.7)Ga(0.3)Se(2) (CIGS) thin film solar cells on molybdenum. This method has four significant advantages over methods currently being empl...

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Bibliographic Details
Published inarXiv.org
Main Authors Kowalczyk, Jeremy M D, Perkins, Jeffrey J, DeAngelis, Alexander, Kaneshiro, Jess, Mallory, Stewart A, Chang, Yuancheng, Gaillard, Nicolas
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 07.01.2013
Subjects
Ablative materials
Atomic properties
Copper
Copper indium gallium selenides
High vacuum
Laser induced breakdown spectroscopy
Lasers
Line spectra
Measuring instruments
Nanosecond pulses
Photovoltaic cells
Pulse duration
Secondary ion mass spectroscopy
Sodium
Solar cells
Spectrum analysis
Thin films
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Summary:In this work, we show that laser induced breakdown spectroscopy (LIBS) with a nanosecond pulse laser can be used to measure the copper and sodium content of CuIn(0.7)Ga(0.3)Se(2) (CIGS) thin film solar cells on molybdenum. This method has four significant advantages over methods currently being employed: the method is inexpensive, measurements can be taken in times on the order of one second, without high vacuum, and at distances up to 5 meters or more. The final two points allow for in-line monitoring of device fabrication in laboratory or industrial environments. Specifically, we report a linear relationship between the copper and sodium spectral lines from LIBS and the atomic fraction of copper and sodium measured via secondary ion mass spectroscopy (SIMS), discuss the ablation process of this material with a nanosecond pulse laser compared to shorter pulse duration lasers, and examine the depth resolution of nanosecond pulse LIBS.
ISSN:2331-8422