Improvement of conversion efficiency of solar cells using wavelength conversion materials.
S20121
Utilizing the short wavelength range that includes ultraviolet light from sunlight to achieve even higher efficiency! A must-listen for those developing high-efficiency solar cell materials!
Seminar Number S20121 Instructor Katsuhiro Kono, Specially Appointed Professor, Emeritus Professor, Doctor of Engineering, Center for Industry-Academia-Government Collaboration, University of Electro-Communications Target Audience Engineers, researchers, responsible departments, and beginners interested in solar cells, phosphors, and reflective coating technology Venue Tokyo Chuo Ward Industrial Hall, 4th Floor, Meeting Room 1 [Tokyo, Nihonbashi] 5 minutes from B4 exit via underground passage from Bakuroyokoyama Station on the Toei Shinjuku Line (Directions 2) 5 minutes from C1 exit via the East Exit ticket gate of Bakurocho Station on the JR Sobu Rapid Line (Directions 3) Date and Time January 26, 2012 (Thursday) 13:30-16:30 Capacity 20 participants *Registration will close once full. Please apply early. Participation Fee [Early Bird Discount Price] 46,200 yen (tax included, including text costs) for up to 2 participants from one company *Limited to Tech-Zone members who apply by January 12. Membership registration is free. *After January 12, the [Regular Price] will be 49,350 yen (tax included, including text costs) for up to 2 participants from one company.
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**[Lecture Abstract]** Typically, most solar cells exhibit a rapid decrease in sensitivity in the short wavelength region below 450 nm, or have almost none at all. On the other hand, while sunlight decreases in this wavelength region, it still has sensitivity up to 300 nm. In other words, solar cells are discarding the short wavelength region of sunlight, which includes ultraviolet light. The proposed solar cell utilizes the wavelength conversion characteristics from absorption to emission by depositing a phosphor containing highly efficient rare earth elements or dyes on the surface of the solar cell, thereby converting the short wavelength region of sunlight into the longer wavelength region where the solar cell has high spectral sensitivity, thus improving conversion efficiency. This method does not involve changing the materials or structure of the solar cell itself to develop a new battery; instead, it enhances efficiency by doping the phosphor into the part equivalent to the anti-reflective coating that is added to the surface of any solar cell. This technology does not depend on the underlying solar cell and can further increase the efficiency of any existing solar cell, as well as new types of solar cells that may emerge.
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1. Urgent Global Warming 1-1. Breaking Away from Fossil Fuels 1-2. Solar Energy as the Savior 1-3. Current Issues with Solar Cells 2. Optical Properties and Types of Phosphors 2-1. Mechanisms of Light Absorption and Emission 2-2. Concentration Quenching Phenomenon in Emission 2-3. Rare Earth, Pigment-Doped Inorganic and Organic Phosphors 3. Phosphors for "Wavelength Conversion" 3-1. Conditions for Phosphor Materials 3-2. Morphology of Phosphors and Their Fabrication Methods 3-3. Potential for UV Degradation of Dyes and Organic Polymers 4. Practical Aspects of "Wavelength Conversion" Solar Cells 4-1. Principles and Composition 4-2. Analysis of Wavelength Conversion Mechanisms and the Importance of Anti-Reflection (AR) Coatings 4-3. Wavelength Matching of Phosphor Thin Films and Solar Cells 4-4. Applications to Various Solar Cells and Results of Efficiency Improvement 5. Prospects for Practical Application and Conclusion 5-1. Challenges for Longevity and Reliability Improvement 5-2. Applications of "Wavelength Conversion" Technology in Other Fields 5-3. Conclusion
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