Method for improving absorption and utilization efficiency of solar energy
A solar energy and efficiency technology, applied in the field of solar energy utilization, can solve the problems of low average absorption rate, large fluctuation of absorption spectrum, low absorption of solar spectrum, etc., and achieve the effect of improving absorption and utilization efficiency.
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[0018] The present invention will be described in detail below in combination with specific embodiments.
[0019] 1 One-dimensional photonic crystal bandgap structure
[0020] The one-dimensional photonic crystal of the present invention is made up of three kinds of materials A, B and D arranged alternately, is (ADB) 10 (BDA) 10 The periodic symmetric structure of , such as figure 1 shown. Its basic parameters, the refractive index of the dielectric material A n a =1.38, geometric thickness a=175nm, dielectric material B, refractive index n b =3.8, geometric thickness b=175nm, material D is metal material, refractive index n d =1.74+0.001i, geometric thickness d=350nm. The center wavelength is taken as λ 0 =700nm, the research wavelength ranges from visible light to near-infrared 400-1200nm solar spectrum, and the incident light is TE wave of vertical incidence.
[0021] Using the method of transmission matrix to study the absorption characteristics, the propagation of...
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