Screen printed Ta₂Os and TiO₂ antireflection coatings for crystalline and polycrystalline silicon solar cells

Abstract

Screen printable inks for Ta2O5 and TiO2 antireflection coatings have been applied to silicon wafers and characterized. On polished crystalline wafers, both coatings give near-zero minimum reflectance. The wavelength of the minimum can be easily tuned to match the solar spectrum by changing the screen mesh size. The average reflectance over the AM1 spectrum can be further reduced by texturizing the wafer surface prior to coating. Similar reflectance results are obtained for both crystalline and polycrystalline wafers, although the average reflectance is not quite as low in the latter case due to the difficulty of texturizing polycrystalline material.

Co-doped NiO nanoflake array films with enhanced electrochromic properties

“…However, many similar phenomena were reported for other This journal is © The Royal Society of Chemistry 2014 transitional metal oxide lms such as TiO 2 and Ta 2 O 5 . [55][56][57] The increased optical transparency can be attributed to the antire-ection. In order to prove the ability of antireection for the asprepared lms, the refractive index measurement of NiO-Co1 lm was carried out as an example.…”

Antireflective Self-Cleaning TiO2 Coatings for Solar Energy Harvesting Applications

“…Yet, a major limiting factor for the quantum efficiency of solar cells is the optical loss due to reflection. For instance, in the air atmosphere, a polished silicon surface reflects >30% of the incident solar radiations (Thomas et al, 1989). Therefore, to reduce optical loss due to high reflectivity and improve the energy harvesting capability of solar cells, different solutions have been proposed such as the utilization of the antireflective coatings (ARCs), surface texturization, or a combination of both to increase the optical path length of the light within solar cells (Singh and Verma, 2019;Abu-Shamleh et al, 2021;Sagar and Rao, 2021).…”

“…Other oxides such as Ta 2 O 5 (Thomas et al, 1989;Sagar and Rao, 2021) could offer better antireflective properties but are not good enough for photocatalytic degradation of environmental contaminants. Therefore, these oxides are often used in combination with TiO 2 to form self-cleaning ARCs.…”

Performance enhancement of multicrystalline silicon solar cells and modules using double‐layered SiNx:H antireflection coatings

“…The optical reflection of a crystalline silicon (c-Si) solar cell can be remarkably reduced via texturization and antireflection coatings (ARC) on its surface. Different ARC materials, such as titania (TiO 2 ), silicon oxide (SiO 2 ), silicon nitride (SiN x ), tantalum pentoxide (Ta 2 O 5 ), zinc sulfide (ZnS), zinc oxide (ZnO), magnesium fluoride (MgF 2 ), and tin dioxide (SnO 2 ), have been employed for c-Si solar cells [1][2][3][4][5][6][7][8]. In the photovoltaic (PV) industry, SiN x is presently the standard ARC for c-Si solar cells.…”