A Review of Laser Processes Used in Solar Cell Fabrication

May 14th, 2015
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There are many different laser techniques that can be used in the production of solar cells. By examining the research which the various solar cells were fabricated with laser technique, it is possible to understand the pros and cons of using laser for produce the cells. The following paragraphs will list which process the laser technique have been used in this review.

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A Review of Laser Processes Used in Solar Cell FabricationA Review of Laser Processes Used in Solar Cell FabricationAbstractThere are many different laser techniques that can be used in the production of solar cells. By examining the research which the various solar cells were fabricated with laser technique, it is possible to understand the pros and cons of using laser for produce the cells. The following paragraphs will list which process the laser technique have been used in this review.IntroductionThe buried contact solar cell was invented at University of New South Wales by Green et al. in 1983. These solar cells have a relatively high efficiency approximately 25% and present a possibility of cost-reduction with applying this technology to the manufacturers production lines.The following are the general main steps of forming the buried contact solar cell: 1. Texturing of surfaces2. Top surface diffusion3. Oxide growth4. Groove cutting and diffusion5. Aluminum deposition and sinter6. Metal plating7. Edge isolationThe key parts of this process, which result in the cells become more efficiency than the standard screen printing solar cells are the laser grooving and groove diffusion to reduce the cell shading and contact resistance and the texturing which reduce the surface reflection. A schematic of a buried contact solar cell is shown in the figure below (Green 1995). [pic]Figure 1: Cross-section of buried contact solar cellResearch continues wor

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