Abstract
We propose a hybrid antireflection structure (ARS), which integrates moth eye texturing and multilayer interference coating, to improve efficiency of organic photovoltaic (OPV) solar cells. We perform nearly global optimization of the geometric parameters characterizing the hybrid ARS, by using optical simulations based on the finite-difference time-domain method. The proposed optimization algorithm consists of two steps: in the first step, only the moth eye structure is globally optimized and, in the second step, the whole hybrid structure is optimized efficiently based on the results of the first step. Thus, the optimal moth eye structure is additionally obtained as an intermediate result. By applying this optimization method to an organic thin film solar cell, we show that the short-circuit current density (J SC) is increased by 8.90% with the moth eye structure and by 9.89% with the hybrid ARS. We also study the sensitivity of photocurrent to the geometric parameters of hybrid ARS, and the change in the spatial distribution of electric field intensity by the ARS. The results show that the hybridization of the two types of light trapping techniques is effective to reduce the inhomogeneity in the electric field distribution and obtain higher electric intensity in almost the whole active layer. The design concept of the hybrid ARS is quite useful for improving light trapping in OPVs and allows for extending the options available for broadband antireflection.
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Yu, G, Gao, J, Hemmelen, JC, Wudl, F, Heeger, AJ, “Polymer Photovoltaic Cells: Enhanced Efficiencies Via a Network of Internal Donor–Acceptor Heterojunctions.” Science, 270 1789–1791 (1995)
Sariciftci, NS, Smilowitz, L, Heeger, AJ, Wudl, F, “Photoinduced Electron Transfer from a Conducting Polymer to Buckminsterfullerene.” Science, 258 1474–1476 (1992)
Park, SH, Roy, A, Beaupre, S, Cho, S, Coates, N, Moon, JS, Moses, D, Leclerc, M, Lee, K, Heeger, AJ, “Bulk Heterojunction Solar Cells with Internal Quantum Efficiency Approaching 100%.” Nat. Photonics, 3 297–303 (2009)
Krebs, FC, Espinosa, N, Hösel, M, Sondergaard, RR, Jorgensen, M, “25th Anniversary Article: Rise to Power—OPV-Based Solar Parks.” Adv. Mater., 26 29–39 (2014)
Jorgensen, M, Norrmann, K, Cevorgyan, SA, Tromholt, T, Andreasen, B, Krebs, FC, “Stability of polymer Solar Cells.” Adv. Mater., 24 580–612 (2012)
Niggemann, M, Blasi, B, Gombert, A, Hinsch, A, Hoppe, H, Lalanne, P, Meissner, D, Wittwer, V, “Trapping Light in Organic Plastic Solar Cells with Integrated Diffraction Gratings.” Proc. 17th Eur. Photovoltaic Solar Energy Conf., Munich, Germany, 2001
Niggemann, M, Riede, M, Gombert, A, Leo, K, “Light Trapping in Organic Solar Cells.” Phys. Status Solidi A, 205 2862–2874 (2008)
Raman, A, Yu, Z, Fan, S, “Dielectric Nanostructures for Broadband Light Trapping in Organic Solar Cells.” Opt. Express, 19 19015–19026 (2011)
Macleod, HA, Thin-Film Optical Filters, 4th ed. CRC Press, Boca Raton, 2010
Brunner, R, Sandfuchs, O, Pacholski, C, Morhard, C, Spatz, J, “Lessons From Nature: Biomimetic Subwavelength Structures for High-Performance Optics.” Laser Photonics Rev., 6 641–659 (2012)
Boden, SA, Bagnall, DM, “Optimization of Moth-Eye Antireflection Schemes for Silicon Solar Cells.” Prog. Photovolt. Res. Appl., 18 195–203 (2010)
Sun, CH, Jiang, P, Jiang, B, “Broadband Moth-Eye Antireflection Coatings on Silicon.” Appl. Phys. Lett., 92 061112 (2008)
Huang, YF, Chattopadhyay, S, “Nanostructure Surface Design for Broadband and Angle-Independent Antireflection.” J. Nanophotonics, 7 073594 (2013)
Deinega, A, Valuev, I, Potapkin, B, Lozovik, Y, “Minimizing Light Reflection from Dielectric Textured Surfaces.” J. Opt. Soc. Am. A, 28 770–777 (2011)
Forberich, K, Dennler, G, Scharber, MC, Hingerl, K, Fromherz, T, Brabec, CJ, “Performance Improvement of Organic Solar Cells with Moth Eye Anti-Reflection Coating.” Thin Solid Films, 516 7167–7170 (2008)
Taflove, A, Hagness, SC, Computational Electrodynamics: The Finite-Difference Time-Domain Method. Artech House Inc., Norwood, 2005
Han, KS, Shin, JH, Yoon, WY, Lee, H, “Enhanced Performance of Solar Cells with Anti-reflection Layer Fabricated by Nano-imprint Lithography.” Sol. Energy Mater. Sol. Cells, 95 288–291 (2011)
Jiao, F, Huang, Q, Ren, W, Zhou, W, Qi, F, Zheng, Y, Xie, J, “Enhanced Performance for Solar Cells with Moth-Eye Structure Fabricated by UV Nanoimprint Lithography.” Microelectron. Eng., 103 126–130 (2013)
Boltasseva, A, “Plasmonic Components Fabrication Via Nanoimprint.” J. Opt. A, 11 114001 (2009)
Brigo, L, Mattei, G, Michieli, N, Brusatin, G, “2D Photonic Gratings from Thermal Imprinting of ITO-Based Films.” Microelectron. Eng., 97 193–196 (2012)
Lü, C, Yang, B, “High Refractive Index Organic–Inorganic Nanocomposites: Design, Synthesis and Application.” J. Mater. Chem., 19 2884–2901 (2009)
Bouhafs, D, Moussi, A, Chikouche, A, Ruiz, JM, “Design and Simulation of Antireflection Coating Systems for Optoelectronic Devices: Application to Silicon Solar Cells.” Sol. Energy Mater. Sol. Cells, 52 79–93 (1998)
Ren, W, Zhang, G, Wu, Y, Ding, H, Shen, Q, Zhang, K, Li, J, Pan, N, Wang, X, “Broadband Absorption Enhancement Achieved by Optical Layer Mediated Plasmonic Solar Cell.” Opt. Express, 19 26536–26550 (2011)
Wang, J, Wang, CW, Li, Y, Zhou, F, Liu, WM, “The Structure Optimization Design of the Organic Solar Cells Using the FDTD Method.” Physica B, 405 2061–2064 (2010)
Farhan, MS, Zalnezhad, E, Bushroa, AR, Sarhan, AAD, “Electrical and Optical Properties of Indium–Tin Oxide (ITO) Films by Ion-Assisted Deposition (IAD) at Room Temperature.” Int. J. Precis. Eng. Manuf., 14 1465–1469 (2013)
Kurdesau, F, Khripunov, G, da Cunha, AF, Kaelin, M, Tiwari, AN, “Comparative Study of ITO Layers Deposited by DC and RF Magnetron Sputtering at Room Temperature.” J. Non Cryst. Solids, 352 1466–1470 (2006)
Xiao, Y, Gao, F, Dong, G, Guo, T, Liu, Q, Ye, D, Diao, X, “Amorphous Indium Tin Oxide Films Deposited on Flexible Substrates by Facing Target Sputtering at Room Temperature.” Thin Solid Films, 556 155–159 (2014)
Kubota, S, Kanomata, K, Momiyama, K, Suzuki, T, Hirose, F, “Robust Design Method of Multilayer Antireflection Coating for Organic Solar Cells.” IEICE Trans. Electron., 96 604–611 (2013)
ASTM G173-03, “Standard Tables for Reference Solar Spectral Irradiances,” ASTM International, West Conshohocken, 2005
Darkwi, AY, Lote, WK, Ibrahim, K, “Computer Simulation of Collection Efficiency of a—Si:H Tandem Solar Cells Interconnected by Transparent Conductive Oxide.” Sol. Energy Mater. Sol. Cells, 60 1–9 (2000)
Luk, WC, Yeung, KM, Tam, KC, Ng, KL, Kwok, KC, Kwong, CY, Ng, AMC, Djurisic, AB, “Enhanced Conversion Efficacy of Polymeric Photovoltaic Cell by Nanostructured Antireflection Coating.” Org. Electron., 12 557–561 (2011)
Hoppe, H, Sariciftci, NS, Meissner, D, “Optical Constants of Conjugated Polymer/Fullerene Based Bulk-Heterojunction Organic Solar Cells.” Mol. Cryst. Liq. Cryst., 385 113–119 (2002)
Rakic, AD, Djurisic, AB, Elazar, JM, Majewski, ML, “Optical Properties of Metallic Films for Vertical-Cavity Optoelectronic Devices.” Appl. Opt., 37 5271–5283 (1998)
Dixon, LCW, Nonlinear Optimization. The English Universities Press, London, 1972
Momma, M, Bennett, KP, “A Pattern Search Method for Model Selection of Support Vector Regression.” Proc. SIAM Conf. Data Mining, Philadelphia, 2012
Hooke, R, Jeeves, TA, “Direct Search Solution of Numerical and Statistical Problems.” J. Assoc. Comput. Mach., 8 212–229 (1961)
Khambampati, AK, Ijaz, UZ, Lee, JS, Kim, S, Kim, KY, “Phase Boundary Estimation in Electrical Impedance Tomography Using the Hooke and Jeeves Pattern Search Method.” Meas. Sci. Technol., 21 035501 (2010)
Yi, H, Duan, Q, Liao, TW, “Three Improved Hybrid Metaheuristic Algorithms for Engineering Design Optimization.” Appl. Soft Comput., 13 2433–2444 (2013)
Raut, HK, Dinachali, SS, He, AY, Ganesh, VA, Saifullah, MSM, Law, J, Ramakrishna, S, “Robust and Durable Polyhedral Oligomeric Silsesquioxane-Based Anti-reflective Nanostructures with Broadband Quasi-omnidirectional Properties.” Energy Environ. Sci., 6 1929–1937 (2013)
Lee, SW, Han, KS, Shin, JH, Hwang, SY, Lee, H, “Fabrication of Highly Transparent Self-cleaning Protection Films for Photovoltaic Systems.” Prog. Photovolt. Res. Appl., 21 1056–1062 (2013)
Tommila, J, Aho, A, Tukiainen, A, Polojärvi, V, Salmi, J, Niemi, T, Guina, M, “Moth-Eye Antireflection Coating Fabricated by Nanoimprint Lithography on 1 eV Dilute Nitride Solar Cell.” Prog. Photovolt. Res. Appl., 21 1158–1162 (2013)
Born, M, Wolf, E, Principles of Optics, 7th ed. Cambridge University Press, Cambridge, 1999
Ji, S, Song, K, Nguyen, TB, Kim, N, Lim, H, “Optimal Moth Eye Nanostructure Array on Transparent Glass Towards Broadband Antireflection.” ACS Appl. Mater. Inter., 5 10731–10737 (2013)
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This study was partially supported by the A-STEP Program of Japan Science and Technology Agency and by KAKENHI (26390025) from the Japanese government.
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Kubota, S., Kanomata, K., Suzuki, T. et al. Hybrid antireflection structure with moth eye and multilayer coating for organic photovoltaics. J Coat Technol Res 12, 37–47 (2015). https://doi.org/10.1007/s11998-014-9614-7
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DOI: https://doi.org/10.1007/s11998-014-9614-7