به دام انداختن نور در سلول‌های خورشیدی سیلیکونی فیلم نازک با استفاده از شبکه‌های شیاردار دندانه‌دار بهینه‌شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری رشته نانو الکترونیک دانشگاه کاشان

2 نانوالکترونیک/پژوهشکده نانو/دانشگاه کاشان/کاشان

چکیده

This paper reports the design and optimization of an ultrahigh-efficiency thin-film silicon solar cell featuring broadband light trapping through a precisely engineered slanted grating architecture. The device, with a periodicity of 300 nm, consists of a 100 nm aluminum (Al) back reflector, a 110 nm p-type silicon active layer incorporating slanted grating structures, and a 45 nm n-type silicon capping layer. Comprehensive optical and electrical characterizations were conducted using Lumerical FDTD and CHARGE solvers, respectively. Beginning with a planar baseline configuration, remarkable performance improvement was realized by introducing slanted grating teeth and meticulously optimizing critical geometric parameters—namely the inter-tooth gap spacing, tooth height, and slant angle. The optimized configuration achieves an inter-tooth gap of 260 nm, tooth height of 90 nm, and slant angle of 40°, yielding an impressive average optical absorption of 84% across the solar spectrum. The electrical characteristics are equally remarkable, demonstrating a short-circuit current density of 44.41 mA/cm², open-circuit voltage of 0.580 V, power conversion efficiency of 20.58%, and fill factor of 0.798

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