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SEIGO ITO,TAKUROU N. MURAKAMI,SHAIK M. ZAKEERUDDIN,SUSUMU KAYAMA,MICHAEL GR€ ATZEL,Tetsuo Yazawa,MASAO MIZUNO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.5
Di®erent-sized nanocrystalline-TiO 2 particles have been used for the optimization of photovoltaice®ects of dye-sensitized solar cells (DSCs) using an ionic-liquid (IL) electrolyte. Ru dye (Z907)was used for the IL-DSC optimization. The TiO 2 nanoparticle sizes and the thickness of nano-crystalline-TiO 2 electrodes ranged from 13 nm to 81 nm and 2 ? m to 23 ? m, respectively. Theparticle size of the nanocrystalline TiO 2 ¯lm greatly a®ected the photovoltaic characteristics,particularly for the IL electrolyte due to limitation of the photocurrent by I?/I?3-di®usion. Theoptimized electrode for IL-DSC had a 15 ? m thickness using a 27 nm diameter of nanocrystalline-TiO 2 particles. In order to characterize the e®ect of the TiO 2 particle size on the photovoltaice®ects of IL-DSCs, a scanning electron micrograph (surface and cross section of nanoparticles),BET speci¯c surface area analysis, pore-size distribution analysis, photocurrent transient measurements, haze spectroscopy, photovoltaic measurements, incident-photon-to-currentconversion e±ciency spectroscopy and impedance measurement have been used.
Shibayama Naoyuki,Kanda Hiroyuki,Yusa Shin-ichi,Fukumoto Shota,Baranwal Ajay K.,Segawa Hiroshi,Miyasaka Tsutomu,Ito Seigo 나노기술연구협의회 2017 Nano Convergence Vol.4 No.18
We confirmed the influence of ZnO nanoparticle size and residual water on performance of all inorganic perovskite solar cells. By decreasing the size of the ZnO nanoparticles, the short-circuit current density (Jsc) and open circuit photovoltage (Voc) values are increased and the conversion efficiency is improved. Although the Voc value is not affected by the influence of residual water in the solution for preparing the ZnO layer, the Jsc value drops greatly. As a result, it was found that it is important to use the oxide nanoparticles with a small particle diameter and to reduce the water content in the oxide forming material in order to manufacture a highly efficient all inorganic perovskite solar cells.