Wide spectral antireflective film for multi-junction solar cell and fabrication method of antireflective film

• Main Authors: FANG XIN, WANG YIFAN, ZHANG WEI
• Format: Patent
• Language: Chinese; English
• Published: 20.03.2013
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a wide spectral antireflective film for a multi-junction solar cell and a fabrication method of the antireflective film. The method comprises the steps of selecting a high-refraction-index material and a low-refraction-index material as coating film materials, improving electron beam evaporation equipment, testing optical material parameters (n,k) with an ellipsometer, inputting an optimization program, determining the number of film layers, inputting structural parameters of the multi-junction cell in the optimization program, running the optimization program to work out the optimal film thickness, coating the low-refraction-index material on the high-refraction-index material close to the surface of the battery to form HLs, increasing the number of the HLs to form a width spectral antireflective film structure, and adding the material with an refraction index of less than 1.2 on the reflective film structure. The antireflective film and the fabrication method of the antireflective f