NDLI: Studies of laser generated debris in crystalline silicon solar cells

Content Provider	IEEE Xplore Digital Library
Author	Ali, J.M.Y. Walls, J.M.
Copyright Year	2013
Description	Author affiliation: SELECT, VIT Univ., Vellore, India (Ali, J.M.Y.) \|\| CREST, Loughborough Univ., Loughborough, UK (Walls, J.M.)
Abstract	Lasers are commonly used in production of solar panels for processes such as drilling through wafers and edge isolation. These laser ablation processes generate microscopic and macroscopic debris which can cause problems with the laser process itself and subsequent production processes. Therefore, it is necessary to understand the generation of debris in the laser ablation process. In this paper, laser ablation of silicon irradiated by 1064 nm pulses emitted by a Nd:YAG laser has been investigated. Here, the ablation process was carried out at various stage speeds. The process was then assisted by a combination of pressurised air and air suction to study the effect on debris formation. Analysis shows that increasing the stage speed resulted in grooves with a smaller Heat Affected Zone and less debris distribution. The effect of applying pressurised air and air suction removed the debris present at the bottom of the groove but it has no effect on the tapers present at the groove edges. These grooves were then chemically etched and it was found that etching completely removed the debris and tapers. However, the use of nitrogen extraction during ablation was found to produce good quality surface finish.
Sponsorship	IEEE Madras Sect.
Starting Page	859
Ending Page	864
File Size	2205500
Page Count	6
File Format	PDF
ISBN	9781467361491
e-ISBN	9781467361507
DOI	10.1109/ICEETS.2013.6533498
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-10
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface emitting lasers Debris analysis Etching Surface roughness Silicon Laser ablation Rough surfaces Gas lasers Crystalline silicon solar cells LGBC
Content Type	Text
Resource Type	Article

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