Title

The Effect Of Film Properties And Laser Processing Parameters On The Laser Ablation Of Molybdenum Thin Films

Keywords

Laser Scribing; Photovoltaics; Thin-film Solar Cells

Abstract

Molybdenum is commonly used as the electrical back contact for Cu(In,Ga)(Se,S)2 thin-film solar cells. In order to create a monolithically interconnected device, scribing of the molybdenum layer is required. This scribe, known as the P1 scribe, is commonly carried out through laser processing. Optimization of this laser scribing has been carried out using a 532nm pulsed Nd:YAG laser. It was found that two specific regimes of processing resulted in defect free scribes. These regimes are low fluency and high pulse overlap, and high fluency and low pulse overlap. Film properties, including the microstructure, surface oxidation, and internal stress, were studied to understand their effect on the laser ablation process. It was observed that a thin layer of oxidation resulted in significant heat affected zone during the laser ablation process. A discussion of the optimal film properties and laser processing parameters is presented.

Publication Date

1-1-2014

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

9180

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2062461

Socpus ID

84922913811 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84922913811

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