Formation of porous silicon for large-area silicon solar cells: A new method

摘要: Abstract Luminescent porous silicon (PS) was prepared for the first time using a spraying set-up, which can diffuse in homogeneous manner HF solutions, on textured or untextured (1 0 0) oriented monocrystalline substrate. This new method allows us to apply PS onto front-side surface of solar cells, by supplying very fine drops. The front side N+/P cells may be treated long periods without altering grid metallic contact. (N+/P, 78.5 cm2) has undergone HF-spraying were made with simple and low-cost method, allowing Al contamination. A poor but expected 7.5% conversion efficiency obtained under AM1 illumination. It shown that optimised concentration, flow rate, contamination favours formation thin hydrogen-rich layer. found conditions, layer decreases reflectivity up 3% (i.e., increase light absorption), improves short circuit current (Isc), fill factor (FF) series resistance), reach 12.5% efficiency. dramatic improvement latter is discussed throughout influence concentration I–V characteristics parameters. Despite fact surfae acts as good anti-reflection coating (ARC), it spectral response especially blue-side spectrum, where absorption becomes greater, owing band gap widening part UV blue into longer wavelengths (that are more suitable Si cell) quantum confinement