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深圳市艾拓电子科技有限公司简便计算 已知x=11&#47;75,y=25&#47;22,求(x=y)^2-(x-y)^2 的值_百度知道
简便计算 已知x=11&#47;75,y=25&#47;22,求(x=y)^2-(x-y)^2 的值
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(x+y)^2-(x-y)^2 =(x+y+x-y)(x+y-x+y)=2x*2y=4xy=4×11/75×25/22=2/3
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(x+y)^2-(x-y)^2=(x+y+x-y)(x+y-x+y)=4xy=4×11/75×25/22=2/3
(x=y)^2-(x-y)^2=2x*2y=4xy=4*11/75*25/22=2/3
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, 3 July 2006, Pages 265–270
Structural and optical properties of thermally evaporated 1,4,8,11,15,18,22,25-octahexylphthalocyanine thin films, , , , a Department of Physics, Taibah University, Madinah, Saudi Arabiab Department of Chemistry, Taibah University, Madinah, Saudi ArabiaMetal-free 1,4,8,11,15,18,22,25-octahexylphthalocyanine was prepared directly by the cyclotetramerization of 3,6-dihexylphthalonitrile using lithium butoxide in butanol. Thin films of the material were deposited on glass substrates by the thermal evaporation technique. The structure of the films was found to be in the α form, and showed a strong peak indicating preferential orientation. The surface morphology of the thin films was investigated by atomic force microscopy and showed that the molecules of 1,4,8,11,15,18,22,25-octahexylphthalocyanine grow in stacks of parallel rows. The spectrophotometric measurements of transmittance and reflectance were carried out in the wavelength range 190&3000 nm. The refractive index, n, and absorption index, k, were found to be independent of annealing at 373 K. The B band absorption occurred at 356 nm, and the Q band showed a doublet at 667 and 739 nm. Other optical parameters, such as absorption coefficient α and optical dielectric constant ε, were determined.KeywordsEvaporation; Atomic force microscopy; Optical properties; Polymers; Phthalocyanines
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No articles found.Dependence of alkyl-substituent length for bulk heterojunction solar cells utilizing 1,4,8,11,15,18,22,25-octaalkylphthalocyanine | (2012) | Hori | Publications | Spie
Journal of Photonics for Energy
Author(s): ; Yasuo
F Hiroyuki
F Masanori
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Paper Abstract
Bulk heterojunction organic thin-film solar cells utilizing soluble phthalocyanine derivatives, 1,4,8,11,15,18,22,25-octaalkylphthalocyanine (CnPcH2, n = 6, 7, 9, 10), were investigated. Two broad peaks existing in the external quantum efficiency spectra almost correspond to the Q-band and B-band of CnPcH2. The solar cell utilizing C6PcH2 had the best photovoltaic properties as evidenced by open-circuit voltage, short-circuit current density, fill factor, and energy conversion efficiency. Almost the same photovoltaic properties were observed in the solar cells utilizing C9PcH2 and C10PcH2. We discuss the photovoltaic properties by taking into consideration the crystal structure and electronic state of CnPcH2 from the results of the absorbance spectra, X-ray diffraction measurement, and polarization microscope observation.
Paper Details
Date Published: 2 March 2012PDF: 8 pagesJ. Photon. Energy. 2(1) 021004 doi:
Published in: Journal of Photonics for Energy Volume 2, Issue 1Show Author Affiliations, Osaka Univ. (Japan)Yasuo
Miyake, Osaka Univ. (Japan)Tetsuya
Masuda, Osaka Univ. (Japan)Takeshi
Hayashi, Osaka Univ. (Japan)Kaoru
Fukumura, Osaka Univ. (Japan)Hiroyuki
Yoshida, Osaka Univ. (Japan)Akihiko
Fujii, Osaka Univ. (Japan)Masanori
Ozaki, Osaka Univ. (Japan)Yo
Shimizu, National Institute of Advanced Industrial Science and Technology (Japan)}