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Efficient dye-sensitized solar cell sub-modules
Hironori Arakawa,Takeshi Yamaguchi,Takanori Sutou,Yutaro Koishi,Nobuyuki Tobe,Daisuke Matsumoto,Takuma Nagai 한국물리학회 2010 Current Applied Physics Vol.10 No.2
Two topics with dye-sensitized solar cell (DSC) development were introduced. The one was development of an efficient glass–substrate 10 cm-by-10 cm DSC sub-modules with current-collecting Ag grids using N719 dye (gac = 8.0%, Jsc = 16.8 mA/㎠, Voc = 0.71 V, ff = 0.67). Accelerated long-term stability tests were conducted using JIS C-8938 environmental and endurance test methods for amorphous-Si solar cell modules,which included a dry heat cycle test (-40 ℃ to 90 ℃, 200 cycles), a heat–humidity test (-40 ℃ to 90 ℃ with 85% humidity, 10 cycles) and a light-soaking test (255 W/m2 (300–700 nm), 500 h). The results suggested DSC using methoxypropionitrile (MPN) electrolyte solvent has a promising future to commercialization of DSC. The other was development of a new preparation method for highly efficient plastic–substrate DSC. This method consisted of important basic technologies such as press without heat treatment,light-confining effect by light scattering TiO2 large particles, binder-free water paste of TiO2 and UV–O3 treatment of TiO2 photoelectrode. The plastic–substrate DSC prepared by this new method showed a very high efficiency, 8.1% (0.29 ㎠) under simulated solar light (100 mW/㎠, AM1.5). Further,an efficient plastic–substrate 10 cm-by-10 cm DSC sub-module with current-collecting Ti grids using N719 dye (gac = 4.5%, Jsc = 10.9 mA/㎠, Voc = 0.72 V, ff = 0.57) was successfully prepared.