journal article·2014

Improved Cleaning Process for Textured ∼25 μm Flexible Mono-Crystalline Silicon Heterojunction Solar Cells with Metal Backing

Sayan Saha, Mohamed M. Hilali, Emmanuel U. Onyegam, Sushant Sonde, Rajesh A. Rao, Leo Mathew, Ajay Upadhyaya, Sanjay K. Banerjee

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Abstract

An improved cleaning process is developed to remove front surface contamination for single heterojunction solar cells on textured surfaces on ∼25 μm thick exfoliated, flexible mono-crystalline silicon. The process is very effective in cleaning metallic and organic residues, without introducing additional contamination or degrading the supporting back metal used for ultrathin substrate handling. Quantitative analysis of the Auger electron spectra shows significant potassium contamination reduction (∼0.89% atomic) using the new cleaning process. An open-circuit voltage enhancement of 22 mV and an absolute 1.5% increase in conversion efficiency are observed with the new cleaning procedure for the exfoliated thin solar cells.
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Research context

OpenAlex topics: Silicon and Solar Cell Technologies · Photovoltaic System Optimization Techniques · Thin-Film Transistor Technologies

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References (18)

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