Formation of surface morphology of silicon solar cells by means of two-step photo-electrochemical etching and their characterization

E. Shatkovskis; V. Zagadskij; A. Jukna; R. Boris; V. Antonovic; J. Stupakova; R. Mitkevicius; A. Baradinskaite; J. Keriene

doi:10.1117/12.2083927

22 October 2014 Formation of surface morphology of silicon solar cells by means of two-step photo-electrochemical etching and their characterization

E. Shatkovskis, V. Zagadskij, A. Jukna, R. Boris, V. Antonovic, J. Stupakova, R. Mitkevicius, A. Baradinskaite, J. Keriene

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Proceedings Volume 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8); 94210B (2014) https://doi.org/10.1117/12.2083927
Event: Eighth International Conference on Advanced Optical Materials and Devices, 2014, Riga, Latvia

Abstract

The electrochemical etching of porous silicon offers many diverse opportunities for production of complex porous silicon structures located not only on the surface but also in a bulk of the silicon devices. A specific technological regime, the photo-electrochemical etching can affect bulk of the silicon device but at the same time saving its textured surface almost unchanged. Our group is the first who investigated the silicon solar cells with textured surface modified by means of photo-electrochemical etching. Etched devices demonstrated better photoelectrical characteristics if compare ones with unmodified solar cells. Our current work presents results on research of solar cells photoelectrochemically treated in HF: ethanol solution. Applied etching regime allowed us to modify the emitter’s volume at the same time affecting only minimally the surface of the solar cell itself. SEM micrographs show the elevations, ripples, bumps, cracks etc. on the surface of photo-electrochemically treated solar cells. The optical ellipsometer spectra, optical microscope measurements results, SEM micrographs of surface morphology as well as light reflectivity of the photoelectrochemically treated and untreated surfaces of the solar cells investigated and discussed in this work.

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E. Shatkovskis, V. Zagadskij, A. Jukna, R. Boris, V. Antonovic, J. Stupakova, R. Mitkevicius, A. Baradinskaite, and J. Keriene "Formation of surface morphology of silicon solar cells by means of two-step photo-electrochemical etching and their characterization", Proc. SPIE 9421, Eighth International Conference on Advanced Optical Materials and Devices (AOMD-8), 94210B (22 October 2014); https://doi.org/10.1117/12.2083927

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KEYWORDS

Silicon

Solar cells

Etching

Scanning electron microscopy

Photomicroscopy

Silicon solar cells

Reflectivity

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