Abstract
Silicon heterojunction (SHJ) solar cells consisting of a hydrogenated amorphous silicon (a-Si:H) film deposited on a crystalline silicon wafer have attracted considerable attention from the photovoltaic industry, because of their high efficiencies, high stabilities, low cost, and low-temperature fabrication. Texturing of silicon surfaces is an effective method for improving the efficiency of silicon solar cells. In this work, textured silicon substrates consisting of three different pyramidal structures were obtained using tetramethylammonium hydroxide (TMAH) solution, and used to fabricate SHJ solar cells. We investigated the influence of different pyramidal structural morphologies on the optical properties and electronic performances, to identify the optimum structure for SHJ solar cells. We obtained a standard silicon substrate with four-sided pyramidal structures using 2% (w) TMAH and 10% (w) isopropyl alcohol (IPA). In comparison with other pyramidal structures, the standard four-sided pyramidal-structured silicon substrate had the lowest reflectance, leading to an increased short-circuit
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