Laser texturization in technology of multicrystalline silicon solar cells

• Autorzy: Dobrzański L. A. , Drygała A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper presents technology of multicrystalline silicon solar cells with laser texturization step. The texturing of polycrystalline silicon surface using Nd:YAG laser makes it possible to increase absorption of the incident solar radiation. Moreover, the additional technological operation consisting in etching in 20% KOH solution at temperature of 80*C introduced into technology of the photovoltaic cells manufactured from laser textured wafers allows for significant improvement in their electrical performance compared to cells produced from the non-textured wafers after saw damage removal. Design/methodology/approach: The topography of laser textured surfaces were investigated using DSM 940 OPTON scanning electron microscope and LSM 5 Pascal ZEISS confocal laser scanning microscope. The reflectance of produced textures was measured by Perkin-Elmer Lambda spectrophotometer with an integrating sphere. Electrical parameters of manufactured solar cells were characterized by measurements of I-V light characteristics under standard AM 1.5 radiation. Findings: Solar cells manufactured from laser-textured polycrystalline silicon wafers demonstrate worse electrical performance than cells manufactured from the non-textured wafers after saw damage removal as well as wafers textured by etching in alkaline solutions. Etching of textured surface in 20% KOH solution at temperature of 80*C subsequent to laser processing shows to have a greatly increased impact on electrical performance of solar cells. Research limitations/implications: Continued etching to remove laser induced defects cause the texture to flatten out reducing it optical effectiveness. Originality/value: This paper demonstrates, that laser processing is very promising technique for texturing multicrystaline silicon independent on grains crystallographic orientation compared to conventional texturing methods in technology of solar cells.

Słowa kluczowe

EN

surface treatment; photovoltaics; silicon solar cells; texturization; laser processing

PL

obróbka powierzchniowa; fotowoltaika; krzemowe ogniwa słoneczne; teksturyzacja; obróbka laserowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 29, nr 1
• Strony: 7--14
• Opis fizyczny: Bibliogr. 18 poz., il., tab., wykr.

Twórcy

autor

Dobrzański L. A.

autor

Drygała A.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

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