Research Papers

Optical Parameters in High-Efficiency Optical Receivers With a Parabolic Reflector Before and After Coating With Ag Film

[+] Author and Article Information
Chung Jui Lee

Industrial Technology Research Institute,
ITRI South Campus, Regional Industrial
Service Department,
Tainan 709, Taiwan
e-mail: chjlee@itri.org.tw

Jen Fin Lin

Department of Mechanical Engineering,
Center for Micro/Nano Science and Technology, Institute of Nanotechnology and
Microsystems Engineering,
National Cheng Kung University,
Tainan 701, Taiwan
e-mail: jflin@mail.ncku.edu.tw

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received June 3, 2012; final manuscript received June 6, 2013; published online August 21, 2013. Assoc. Editor: Santiago Silvestre.

J. Sol. Energy Eng 136(2), 021003 (Aug 21, 2013) (15 pages) Paper No: SOL-12-1146; doi: 10.1115/1.4024924 History: Received June 03, 2012; Revised June 06, 2013

High-efficiency optical receivers before and after the coating of Ag film are composed of a parabolic reflector, a solid parabolic second optical element (SOE), and a Fresnel/aspheric concentrating lens. The optical receivers before the Ag-film coating are fabricated on a high-precision machine tool based on an optimum design attained from ray tracing software simulations. The real profiles of the reflector before and after coating the Ag film are found to be the average of the two orthogonal parabolic profiles. They are then compared to the perfect profile (without profile error and surface roughness) in order to investigate the influence of the profile error and the Ag film on optical performances. The optical parameters, including the total flux, the optical efficiency, and the maximum, minimum, and mean irradiances are evaluated for ray projection simulations in the ASTM G173-03 spectrum. Experiments for the same ray source are also carried out to compare with the simulation results. It is determined that Ag-film coating can improve the profile error and surface roughness of the reflector, thus resulting in all optical parameters being either equal to or higher than those of the reflector without Ag coating. The total flux and optical efficiency obtained from the module with the Fresnel lens has values relatively higher than those of the aspheric lens. The irradiance uniformity for the Fresnel lens is also determined to be better than that of the aspheric lens. The irradiance intensity of the reflector after coating the Ag film has a magnitude at various wavelengths higher than that of the reflector without the Ag-film coating. Due to the coating of the Ag film, the optical receiver shows an almost constant rise in optical efficiency for the two types of concentrating lenses. This characteristic is shown to be valid for both the simulation and experimental results.

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National Center for Photovoltaics, 2011, “Best Research-Cell Efficiencies,” National Renewable Energy Laboratory, Golden, CO.
Green, M. A., Emery, K., Yishikawa, H., and Warta, W., 2009, “Solar Cell Efficiency Tables,” Prog. Photovoltaics, 17, pp. 85–94. [CrossRef]
Shah, A. V., Schade, H., Vanecek, M., Meier, J., Sauvain, E. V., and Wyrsch, N., 2004, “Thin-Film Silicon Solar Cell Technology,” Prog. Photovoltaics, 12, pp. 113–142. [CrossRef]
Dadouche, F., Bethoux, O., and Kleider, J. P., 2011, “New Silicon Thin-Film Technology Associated With Original DC-DC Converter: An Economic Alternative Way to Improve Photovoltaic Systems Efficiencies,” Energy, 36, pp. 1749–1757. [CrossRef]
King, R. R., Law, D. C., Edmondson, K. M., Fetzer, C. M., Kinsey, G. S., Yoon, H., Krut, D. D., Ermer, J. H., Sherif, R. A., and Karam, N. H., 2007, “Advances in High-Efficiency III-V Multijunction Solar Cell,” Adv. OptoElectron., 2007, pp. 29523. [CrossRef]
Kazmerski, L. L., 2006, “Solar Photovoltaics R&D at the Tipping Point: A 2005 Technology Overview,” J. Electron Spectrosc. Relat. Phenom., 150(2-3), pp. 105–135. [CrossRef]
Guha, S., 2004, “Thin Film Silicon Solar Cells Grown Near the Edge of Amorphous to Microcrystalline Transition,” Sol. Energy, 77, pp. 887–892. [CrossRef]
Gratzel, M., 2004, “Conversion of Sunlight to Electric Power by Nanocrystalline Dye Sensitized Solar Cells,” J. Photochem. Photobiol., A, 164, pp. 3–14. [CrossRef]
Green, M. A., 2009, “The Path to 25% Silicon Solar Cell Efficiency History of Silicon Cell Evolution,” Prog. Photovoltaics, 17, pp. 183–189. [CrossRef]
Barnett, A., Kirkpatrick, D., Honsberg, C., Moore, D., Wanlass, M., Emery, K., Schwartz, R., Carlson, D., Bowden, S., Aiken, D., Gray, A., Kurtz, S., Kazmerski, L., Steiner, M., Gray, J., Davenport, T., Buelow, R., Takacs, L., Shatz, N., Bortz, J., Jani, O., Goossen, K., Kiamilev, F., Doolittle, A., Ferguson, I., Unger, B., Schmidt, G., Christensen, E., and Salzman, D., 2009, “Very High Efficiency Solar Cell Modules,” Prog. Photovolt: Res. Appl., 17, pp.75–83. [CrossRef]
Bett, A. W., Burger, B., Dimroth, F., Siefer, G., and Lerchenmüller, H., 2006, “High-Concentration PV Using III-V Solar Cells,” IEEE 4th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, May 7–12. [CrossRef]
Rumyantsev, V. D., Sadchikov, N. A., Chalov, A. E., Ionova, E. A., Friedman, D. J., and Glenn, G., 2006, “Terrestrial Concentrator PV Modules Based on GaInP/GaAs/Ge TJ Cells and Minilens Panels,” IEEE 4th World Conference on Photovoltaic Energy Conversion, Waikoloa, HI, May 7–12, pp. 632–635. [CrossRef]
Spencer, M., and Horne, S. J., 2009, “Shield for Solar Radiation Collector,” Solfocus Inc., Patent No. US7473000 B2.
Garg, H. P., and Adhikari, R. S., 1998, “Optical Design Calculations for CPCs,” Energy, 23(10), pp. 907–909. [CrossRef]
Gallo, M., Mescia, L., Losito, O., Bozzetti, M., and Prudenzano, F., 2011, “Design of Optical Antenna for Solar Energy Collection,” Energy, 39(1), pp. 27–32. [CrossRef]
Siefer, G., and Bett, A. W., 2005, “Experimental Comparison Between the Power Outputs of FLATCON® Modules and Silicon Flat Plate Modules,” 31st IEEE Photovoltaic Specialists Conference, Lake Buena Vista, FL, January 3–7, pp. 643–646. [CrossRef]
Alvarez, J. L., Diaz, V., and Alonso, J., 2005, “Optics Design Key Points for High Gain Photovoltaic Solar Energy Concentrators,” Proc. SPIE, 5962, p. 596210. [CrossRef]
Brinksmeier, E., Gessenharter, A., Perez, D., Blen, J., Benitez, P., Diaz, V., and Alonso, J., 2010, “Design and Manufacture of Aspheric Lenses for Novel High Efficient Photovoltaic Concentrator Modules,” 3rd International Workshop on CPV Session II, Bremerhaven, Germany, October 20–22.
IEK Industry Service and Information Network, 2009, “Introduction and Development Outlook for the Optic-Electric Technology of the Concentration Photovoltaic,” Parts I and II, http://ieknet.itri.org.tw
Salas, V., and Olias, E., 2009, “Overview of the Photovoltaic Technology Status and Perspective in Spain,” Renewable Sustainable Energy Rev., 13, pp. 1049–1057. [CrossRef]
Tzeng, G. H., Shiau, T. A., and Lin, C. Y., 1992, “Application of Multicriteria Decision Making to the Evaluation of New Energy System Development in Taiwan,” Energy, 17(10), pp. 983–992. [CrossRef]
Hein, M., Meusel, M., Baur, C., Dimroth, F., Lange, G., Siefer, G., Tibbits, T. N. D., Bett, A. W., Andreev, V. M., and Rumyantsev, V. D., 2001, “Characterisation of a 25% High-Efficiency Fresnel Lens Module With GaInP/GaInAs Dual-Junction Concentrator Solar Cells,” 17th EU-PVSEC, Munich October 22–26, Paper No. OB5.4.
Bett, A. W., Baur, C., Dimroth, F., Lange, G., Meusel, M., van Riesen, S., Siefer, G., Andreev, V. M., Rumyantsev, V. D., and Sadchikov, N. A., 2003, “FlatconTM-Modules: Technology and Characterization,” IEEE 3rd World Conference on Photovoltaics, Osaka, Japan, May 12–16.
Terao, A., Mulligan, W. P., Daroczi, S. G., Pujol, O. C., Verlinden, P. J., and Swanson, R. M., 2000, “A Mirror-Less Design for Micro-Concentrator Modules,” Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference, Anchorage, AK, September 15–22, pp. 1416–1419. [CrossRef]
Alvarez, J. L., Cabrera, J., Diaz, V., Mateos, C., Montoya, N., and Alonso, J., 2006, “Industrialization of 1000× Concentration Photovoltaic Modules,” Proc. SPIE, 6197, pp. 1–5. [CrossRef]
Lee, W. B., Cheung, C. F., Chiu, W. M., and Leung, T. P., 2000, “An Investigation of Residual Form Error Compensation in the Ultra Precision Machining of Aspheric Surfaces,” J. Mater. Process. Technol., 99, pp. 129–134. [CrossRef]
Cho, M. W., Kim, G. H., Seo, T. I., Hong, Y. C., and Cheng, H. H., 2006, “Integrated Machining Error Compensation Method Using OMM Data and Modified PNN Algorithm,” Int. J. Mach. Tools Manuf., 46, pp. 1417–1427. [CrossRef]
Depince, P., and Hascoet, J. Y., 2006, “Active Integration of Tool Deflection Effects in End Milling Part 2, Compensation of Tool Deflection,” International Journal of Machine Tools & Manufacture, 46, pp. 945–956. [CrossRef]
Paul, E., Evans, C. J., Mangamelli, A., McGlauflin, M. L., and Polvanit, R. S., 1996, “Chemical Aspects of Tool Wear in Single Point Diamond Turning,” Precis. Eng., 18(1), pp. 4–19. [CrossRef]
Institute for Micromanufacturing, 2002, “Introduction to Diamond Machining Institute of Micromanufacturing,” Louisiana Tech University, Ruston, LA, http://www.ddk.com/PDFs/introtodiamondmachining.pdf
Gerchman, M. C., 1986, “Specifications and Manufacturing Considerations of Diamond-Machined Optical Components,” Proc. SPIE, 0607, pp. 36–45. [CrossRef]
Wu, C. Y., Jacobson, A. R., Laba, M., and Baveye, P. C., 2009, “Accounting for Surface Roughness Effects in the Near-Infrared Reflectance Sensing of Soils,” Geoderma, 152, pp. 171–180. [CrossRef]
Lee, S. H., Kim, D. H., Kim, J. H., Lee, G. S., and Park, J. G., 2009, “Effect of Metal-Reflection and Surface-Roughness Properties on Power-Conversion Efficiency for Polymer Photovoltaic Cells,” J. Phys. Chem. C, 113, pp. 21915–21920. [CrossRef]
Yonehara, M., Matsui, T., Kihara, K., Isono, H., Kijima, A., and Sugibayashi, T., 2004, “Experimental Relationships Between Surface Roughness, Glossiness and Color of Chromatic Colored Metals,” Mater. Trans., 45(4), pp. 1027–1032. [CrossRef]
Herrmann, M., Wiegand, C., Jonuscheit, J., and Beigang, R., 2009, “The Influence of Surface Roughness on THz Reflection Measurement,” 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2009), Busan, South Korea, September 21-25. [CrossRef]
Baccaro, S., Cecilia, A., Sarcina, I. D., and Piegari, A. M., 2004, “Optical Coatings Behavior Under γ Irradiation for Space Applications,” Proc. SPIE, 5494, pp. 529–535. [CrossRef]
Miller, D. C., Kempe, M. D., Kennedy, C. E., and Kurtz, S. R., 2011, “Analysis of Transmitted Optical Spectrum Enabling Accelerated Testing of Multijunction Concentrating Photovoltaic Designs,” Opt. Eng., 50(1), p. 013003. [CrossRef]
Susemith, I., and Schissel, P., 1987, “Specular Reflectance Properties of Silvered Polymer Materials,” Sol. Energy Mater. Sol. Cells, 16, pp. 403–421. [CrossRef]
Dahal, L. R., Sainju, D., Li, J., Podraza, N. J., Sestak, M. N., and Collins, R. W., 2009, “Comparison of Al/ZnO and Ag/ZnO Interfaces of Back-Reflectors for Thin Film Si:H Photovoltaics,” 34th IEEE Photovoltaic Specialists Conference (PVSC), Philadelphia, PA, June 7–12, pp. 001702–001707. [CrossRef]
Goikhman, A. Y., Sheludyakov, S. A., and Bogdanov, E. A., 2011, “Ion Beam Deposition for Novel Thin Film Materials and Coating,” Mater. Sci. Forum, 64, pp. 195–200. [CrossRef]
Munzert, P., Schulz, U., and Kaiser, N., 2007, “High Reflectance Coatings on Plastic Optical Systems,” Vak. Forsch. Prax., 19(1), pp. 11–15. [CrossRef]
Lee, C. J., and Lin, J. F., 2010, “Lens Designs by Ray Tracing Analyses for High-Performance Reflection Optical Modules,” J. Opt., 12, p. 095501. [CrossRef]
Lambda Research Corporation, 2010, TracePro Software for Opto-Mechanical Modeling User Manual, Release 6, Revision November 3, 2.7–2.13.
Sun, W., McBride, J. W., and Hill, M., 2010, “A New Approach to Characterising Aspheric Surfaces,” Precis. Eng., 34, pp. 171–179. [CrossRef]
Terao, A., Daroczi, S. G., Coughlin, S. J., Mulligan, W. P., and Swanson, R. M., “New Developments on the Flat-Plate Micro-Concentrator Module,” 3rd World Conference on Photovoltaic Energy Conversion, Osaka, Japan, May 11–18, pp. 861–864.
Hecht, E., 1956, “The Propagation of Light,” Optics, 3rd ed., Addison-Wesley Longman, Inc., Adelphi University, Chap. IV.
Leftheriotis, G., Yianoulis, P., and Patrikios, D., 1997, “Deposition and Optical Properties of Optimized ZnS/Ag/ZnS Thin Films for Energy Saving Applications,” Thin Solid Films, 306, pp. 92–99. [CrossRef]
Liu, X., Cai, X., Mao, J., and Jin, C., 2001, “ZnS/Ag/ZnS Nano-Multilayer Films for Transparent Electrodes in Flat Display Application,” Appl. Surf. Sci., 183, pp. 103–110. [CrossRef]
Xuanjie, L., Xun, C., Jinshuo, Q., Jifang, M., and Ning, J., 2003, “The Design of ZnS/Ag/ZnS Transparent Conductive Multilayer Films,” Thin Solid Films, 441, pp. 200–206. [CrossRef]
Peiponen, K. E., and Tsuboi, T., 1990, “Metal Surface Roughness and Optical Reflectance,” Opt. Laser Technol., 22(2), pp. 127–130. [CrossRef]
Bennett, H. E., and Porteus, J. O., 1961, “Relation Between Surface Roughness and Specular Reflectance at Normal Incidence,” J. Opt. Soc. Am., 51(2), pp. 123–129. [CrossRef]
Jacobson, M. R., Kneale, R. C., Gillett, F. C., Raybould, K., Filhaber, J. M., Camigilia, C., Laird, R., Kitchens, D., Shimshock, R., and Booth, D. C., 1998, “Development of Silver Coating Options for the Gemini 8-M Telescopes Project,” Proc. SPIE, 3352, pp. 477–502. [CrossRef]


Grahic Jump Location
Fig. 4

Design of Fresnel lens. (a) Geometries of the Fresnel lens and the points for transmissivity measurement; (b) magnified drawings of the encircled local sections in (a).

Grahic Jump Location
Fig. 3

Design of the aspheric concentrating lens

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Fig. 2

(a) Geometries of the reflector and SOE; (b) positions of the reflector and SOE; and (c) schematic diagram of the optical receiver

Grahic Jump Location
Fig. 1

Framework of the proposed optical receiver

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Fig. 5

Dimensions and surface profile of the parabolic reflector

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Fig. 6

The design and dimensions of the SOE

Grahic Jump Location
Fig. 7

Transmissivity of the SOE at various wavelengths

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Fig. 17

The photograph of the optical receiver

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Fig. 18

Irradiance intensities of the ASTM G173-3 ray source created by the optical receiver with the reflector (a) before and (b) after coating Ag film

Grahic Jump Location
Fig. 11

(a) Designed profile and the real SOE profile; (b) errors in the SOE profile between the designed profile and the measurements

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Fig. 12

Variations of reflectance with wavelength for the optical receivers with the reflector (a) before and (b) after coating the Ag film

Grahic Jump Location
Fig. 13

Ray tracings in the optical receiver and distribution of irradiances on the chip for (a) the ideal parabolic surface profile (b) the reflector profile before coating the Ag film, (c) the reflector profile after coating the Ag film; the surface profile with △/4 is given for both (b) and (c), and the Fresnel lens is used.

Grahic Jump Location
Fig. 14

Ray tracings for light-collection receiver and distribution of irradiances on the chip surface for the reflector with (a) ideal parabolic profile, (b) the △/4 profile error before coating Ag, and (c) the △/4 profile error after coating Ag. The aspheric lens is assumed to have a sharp edge in the simulations.

Grahic Jump Location
Fig. 15

Ray tracings for light-collection module and distribution of irradiances on the chip surface for the reflector with (a) ideal parabolic profile, (b) the △/4 profile error before coating Ag, and (c) the △/4 profile error after coating Ag. The aspheric lens is now prepared with a blunt edge in the simulations.

Grahic Jump Location
Fig. 16

The reflectance of four metallic films obtained at various wavelengths of sun ray [46,52]

Grahic Jump Location
Fig. 8

Measurement of the reflector profile

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Fig. 9

(a) Surface profiles measured along the −Y-Y section before the Ag coating; (b) surface profiles in the reflector after coating the Ag

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Fig. 10

Magnifications of the profiles of the reflector in four directions; the profiles of the reflector (a) before and (b) after the Ag coating



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