Deep-Level Defects in a Photovoltaic Converter with an Antireflection Porous Silicon Film Formed by Chemical Stain Etching

Tregulov, V. V.; Litvinov, V. G.; Ermachikhin, A. V.

doi:10.1134/s1063785019020342

Cited by 1 publication

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“…In order to improve the laser transmission efficiency at both 1053 nm and 527 nm and maintain high laser damage resistance, the antireflection coating conventionally consists of a polysiloxane layer (with a high refractive index) and a porous SiO 2 layer (with a low refractive index) [ 3 , 4 , 5 ]. The sol–gel technique is a favorable method for preparing such coatings due to its advantages, like its low cost, high chemical purity, high preparation efficiency, and strong resistance to laser damage [ 6 , 7 , 8 ], compared with other methods [ 9 , 10 , 11 ]. However, sol–gel-prepared polysiloxane coatings need to be cured at 140 °C (which is higher than the phase transition temperature of DKDP crystal [ 12 ]), and its intrinsic refractive index is higher (around 1.5 [ 13 , 14 ]) than the designed value (around 1.37) to achieve high transmission at both 1053 nm and 527 nm.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of UV-Curable Polysiloxane Coating with Tunable Refractive Index Based on Controllable Hydrolysis

Huang

Yan

et al. 2023

Nanomaterials

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In order to improve laser transmission efficiency at 1053 nm and 527 nm, a potassium deuterium phosphate (DKDP) crystal (a key component of high-power laser systems) needs a bi-layer antireflection coating system on its incident surface. UV-curable polysiloxane coatings with a refractive index varying from 1.500 to 1.485 were prepared through the polycondensation of a methacryloxy propyl trimethoxylsilane (MPS) monomer with a controllable degree of hydrolysis. Additionally, the influence rule of the coating structure on the refractive index was intensively studied, and the primary factors that dominate the hydrolysis process were discussed. Further refractive index adjustment was achieved using only a small amount of dopant based on the polysiloxane coating with refractive index of 1.485, allowing for high antireflection of the bi-layer coating system at desired wavelengths to be achieved. In addition, high laser damage resistance and remarkable mechanical properties of the coating were simultaneously realized through the incorporation of a minor quantity of dopants, which benefited from the successful modulation of the intrinsic refractive index of the polysiloxane coating.

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