J. Jpn. Inst. Electron. Packaging 15(3): (2012)

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1 集 *Kyushu Institute of % cm % Fig. 1 Certified larger than DSC: Dye solar cells * Research Trend Aiming at High Efficiency Organic Solar Cells Shuzi HAYASE* Technology (2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka ) cm % % 10.0% cm 2 (CIGS) UCLA NREL 3. Fig. 2 Fig % 11.0% HBL ETL HTL EBL 1) 1 cm 2 HTL ETL/HTL cm 2 ETL HTL NIMS ETL HTL efficiency of single solar cells with area cm 2 sensitized solar cells, OPV: Organic thin film Fig. 2 OPV structure * 1 cm 2 1) 9.9% cm 2 4.2% 10.4% 1 Vol. 15 No. 3 (2012) 175

2 特集Fig. 3 Chemical structure of HTL and ETL employed for OPV HTL: hole transport layer, ETL: electron transport layer Fig. 5 Reduction-oxidation potential for various redox species Fig. 4 One of HTLs which can generate electrons up to 850 nm ETL HTL 1 Fig. 3 ETL HTL ETL HTL Fig nm Fig Si Fig. 6 Cell structure of iodine free dye-sensitized solar cells consisting of Co complexes 15% (E ff ) (Jsc) (Voc) (FF) (E eff =Jsc Voc FF) Voc (0.9 V) Fig. 5 Voc Co 2) 8) Fig. 6 Co Co Graetzel Co 12.3% 8) 1.0 V 176 Vol. 15 No. 3 (2012)

3 特集(0.935 V) Co Co Co S S 9),10) Fe 6% 11) Ru Ru 12) Ru 11.3% Incident photon to current efficiency IPCE 800 nm 90% 800 nm 950 nm 1) 950 nm IPCE nm IPCE nm IPCE nm IPCE Fig ) 15) Fig. 7 Hybrid dye sensitized solar cell Fig. 8 TCO-less dye-sensitized solar cell TCO-less: transparent conductive oxide less 2 Voc2 (J top +J bottom ) J hyb Voc % 16) 24) Fig. 8 Vol. 15 No. 3 (2012) 177

4 特集Fig. 9 TCO-less back contact dye-sensitized solar cells with fiber, cylinder and flat structures Ti 5 8% Fig. 9 22),25) 28) F-1 (6.1%) F-2 (5.6%) F-3 (2.4%) F-4 (5.1%) ) M. A. Green, K. Emery, Y. Hishikawa, W. Warta, and E. D. Dunlop: Solar Cell Efficiency Tables (Version 39), Prog. Photovolt: Res. Appl., Vol. 20, pp , ) R. Service: Outlook Brightens for Plastic Solar Cells, Science, Vol. 332, No. 6027, p. 293, ) S. M. Feldt, E. A. Gibson, E. Gabrielsson, L. Sun, G. Boschloo, and A. Hagfeldt: Design of Organic Dyes and Cobalt Polypyridine Redox Mediators for High-Efficiency Dye-Sensitized Solar Cells, J. Am. Chem. Soc., Vol. 132, pp , ) S. M. Feldt, G. Wang, G. Boschloo, and A. Hagfeldt: Effects of Driving Forces for Recombination and Regeneration on the Photovoltaic Performance of Dye-Sensitized Solar Cells Using Cobalt Polypyridine Redox Couples, J. Phys. Chem. C, Vol. 115, pp , ) M. D. McGehe: Applied Physics. Paradigm Shifts in Dye-Sensitized Solar Cells, Science, Vol. 334, pp , ) H. N. Tsao, C. Yi, T. Moehl, J.-H. Yum, S. M. Zakeeruddin, M. K. Nazeeruddin, and M. Graetzel: Cyclopentadithiophene Bridged Donor Acceptor Dyes Achieve High Power Conversion Efficiencies in Dye-Sensitized Solar Cells Based on the tris-cobalt Bipyridine Redox Couple, ChemSusChem, Vol. 4, pp , ) Y. Bai, J. Zhang, D. Zhou, Y. Wang, M. Zhang, and P. Wang: Engineering Organic Sensitizers for Iodine-Free Dye-Sensitized Solar Cells: Red-Shifted Current Response Concomitant with Attenuated Charge Recombination, J. Am. Chem. Soc., Vol. 133, pp , ) A. Yella, H.-W. Lee, H. N. Tsao, C. Yi, A. K. Chandiran, M. K. Nazeeruddin, E. W.-G. Diau, C.-Y. Yeh, S. M. Zakeeruddin, and M. Grätzel: Porphyrin-Sensitized Solar Cells with Cobalt (II/III)-Based Redox Electrolyte Exceed 12 Percent Efficiency, Science, Vol. 334, pp , ) D. Li, H. Li, Y. Luo, K. Li, Q. Meng, M. Armand, and L. Chen: Non-Corrosive, Non-Absorbing Organic Redox Couple for Dye-Sensitized Solar Cells, Adv. Funct. Mater., Vol. 20, pp , ) H. Tian, X. Jiang, Z. Yu, L. Kloo, A. Hagfeldt, and L. Sun: Efficient Organic-Dye-Sensitized Solar Cells Based on an Iodine- Free Electrolyte, Angew. Chem., Vol. 122, pp , ) L. Li, X. Yang, J. Gao, H. Tian, J. Zhao, A. Hagfeldt, and L. Sun: Highly Efficient CdS Quantum Dot-Sensitized Solar Cells 178 Vol. 15 No. 3 (2012)

5 特集Based on a Modified Polysulfide Electrolyte, J. Am. Chem. Soc., Vol. 133, pp , ) A. Hagfeldt, G. Boschloo, L. Sun, L. Kloo, and H. Pettersson: Dye-Sensitized Solar Cells, Chem. Rev., Vol. 110, pp , ) F. Inakazu, Y. Noma, Y. Ogomi, and S. Hayase: Dye- Sensitized Solar Cells Consisting of Dye-Bilayer Structure Stained with Two Dyes for Harvesting Light of Wide Range of Wavelength, Appl. Phys. Lett., Vol. 93, , ) K. Sadamasu, T. Inoue, Y. Ogomi, S. S. Pandey, and S. Hayase: Hybrid Dye-Sensitized Solar Cells Consisting of Double Titania Layers for Harvesting Light with Wide Range of Wavelengths, Appl. Phys. Express, Vol. 4, , ) Q. Miao, L. Wu, J. Cui, M. Huang, and T. Ma: A New Type of Dye-Sensitized Solar Cell with a Multilayered Photoanode Prepared by a Film-Transfer Technique, Adv. Mater., Vol. 23, pp , ) Y. Yoshida, S. S. Pandey, K. Uzaki, S. Hayase, M. Kono, and Y. Yamaguchi: Transparent Conductive Oxide Layer-Less Dye- Sensitized Solar Cells Consisting of Floating Electrode with Gradient TiO x Blocking Layer, Appl. Phys. Lett., Vol. 94, , ) J. M. Kroon, N. J. Bakker, H. J. P. Smit, P. Liska, K. R. Thampi, P. Wang, S. M. Zakeeruddin, M. Graetzel, A. Hinsch, S. Hore, U. Wurfel, R. Sastrawan, J. R. Durrant, E. Palomares, H. Pettersson, T. Gruszecki, J. Walter, K. Skupien, and G. E. Tulloch: Nanocrystalline Dye-Sensitized Solar Cells Having Maximum Performance, Prog. Photovolt: Res. Appl., Vol. 15, pp. 1 18, ) N. Fuke, A. Fukui, A. Islam, R. Komiya, R. Yamanaka, H. Harima, and L. Han: Influence of TiO 2 /Electrode Interface on Electron Transport Properties in Back Contact Dye-Sensitized Solar Cells, Sol. Energy Mater. & Sol. Cells, Vol. 93, pp , ) N. Fuke, A. Fukui, R. Komiya, Y. Chiba, R. Yamanaka, and L. Han: Back Contact Dye-Sensitized Solar Cells, Jpn. J. Appl. Phys., Vol. 46, No. 18, pp. L420 L422, ) N. Fuke, A. Fukui, R. Komiya, A. Islam, Y. Chiba, M. Yanagida, R. Yamanaka, and L. Han: New Approach to Low-Cost Dye-Sensitized Solar Cells with Back Contact Electrodes, Chem. Mater., Vol. 20, pp , ) N. Fuke, A. Fukui, A. Islam, R. Komiya, R. Yamanaka, L. Han, and H. Harima: Electron Transport in Back Contact Dye- Sensitized Solar Cells, J. Appl. Phys., Vol. 104, , ) J. Usagawa, S. S. Pandey, S. Hayase, M. Kono, and Y. Yamaguchi: Tandem Dye-Sensitized Solar Cells Fabricated on Glass Rod without Transparent Conductive Layers, Appl. Phys. Express, Vol. 2, , ) K. Uzaki, T. Nishimura, J. Usagawa., Y. Yoshida, S. Hayase, M. Kono, and Y. Yamaguchi: Dye-Sensitized Solar Cells Consisting of TCO-Less Structures: Aiming at High Efficiency from the View Point of Light Harvesting and Charge Collection, Sol. Energy Mater. Sol. Cells, Vol. 231, , ) Y. Kashiwa, Y. Yoshida, and S. Hayase: All-Metal-Electrode- Type Dye Sensitized Solar Cells (Transparent Conductive Oxide-Less Dye Sensitized Solar Cell) Consisting of Thick and Porous Ti Electrode with Straight Pores, Appl. Phys. Lett., Vol. 92, , ) K. Uzaki, T. Nishimura, J. Usagawa, S. Hayase, M. Kono, and Y. Yamaguchi: Dye-Sensitized Solar Cells Consisting of 3D- Electrodes, Journal of Solar Energy Engineering, Vol. 132, , ) S. Hayase: High Efficiency 3D Dye Sensitized Solar Cells and the Nano-Surface Control, World Journal of Engineering, Vol. 8, pp. 9 14, ) J. Usagawa, M. Kaya, S. S. Pandey, and S. Hayase: Transparent Conductive Oxide-less Tandem Dye Sensitized Solar Cells Consisting of Light Splitting Structures, Journal of Photonics for Energy, Vol. 1, , ) J. Usagawa, S. S. Pandey, Y. Ogomi, S. Noguchi, Y. Yamaguchi, and S. Hayase: Transparent Conductive Oxide-Less Three- Dimensional Cylindrical Dye-Sensitized Solar Cell Fabricated with Flexible Metal Mesh Electrode, Prog. Photovolt: Res. Appl., 2011 DOI: /pip. 著者紹介 JST Vol. 15 No. 3 (2012) 179

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