TRANSPARENT SUBSTRATE HAVING AN ANTI-REFLECTIVE MULTILAYERED COATING THEREON AND METHOD FOR PREPARING THE SAME

• Main Authors: KIM, JUNG JU, YOON, SUNG KUN, BAE, KYOUNG HWAN
• Format: Patent
• Language: English; Korean
• Published: 07.01.2015
• 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; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; 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 present invention provides a transparent substrate for a solar cell and a production method thereof more enhancing durability and productivity while having a wide band (380-1100 nm) anti-reflectivity, which, as a transparent substrate applied to the outermost surface of the solar cell, improve transmissivity in a visible ray and a near-infrared ray area whereas lowering transmissivity in an infrared ray area causing degradation of a solar cell module, thereby contributing to efficiency improvement of the solar cell. The present invention relates to a transparent substrate having an anti-reflective coating layer including a transparent base material; a first coating layer formed with a first refractive index on the transparent base material; a second coating layer formed with a second refractive index on the first coating layer; a third coating layer formed with a third refractive index on the second coating layer; and a fourth coating layer formed with a fourth refractive index on the third coating layer and where the first refractive index is greater than the second refractive index and the third refractive index is greater than the fourth refractive index. The present invention has transmissivity higher than the transparent base material before forming the first, the second, the third and the fourth coating layer in a wavelength range of 380-1,100 nm and lower than the transparent base material before forming the first, the second, the third and the fourth coating layer in a wavelength range of 1,100-2,500 nm.