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1. Á¦ ¸ñ : High Efficiency Mesoscopic Solar Cells Based on Inorganic Quantum Dot Sensitizers 2. ¿¬ »ç : ¹Ú³²±Ô ±³¼ö (¼º±Õ°ü´ë ÈÇаøÇкÎ) 3. ÀÏ ½Ã : 2012³â 8¿ù 21ÀÏ (È) 16:00 ~ 17:00 4. Àå ¼Ò : ¼¿ï´ëÇб³ ½Å°øÇаü (301µ¿) 117È£ ¼¼¹Ì³ª½Ç 5. ³» ¿ë :
Abstract : Highly efficient nanostructured solar cells based on quantum dot sensitizers are presented. Inorganic or organic-inorganic hybrid quantum dots are directly deposited on mesoporous TiO2 film using a spin coating or a successive ionic layer absorption and reaction method. Photovoltaic solar cells are constructed by either electrochemical junction or p-i-n junction. For the case of perovskite-type organic-inorganic hybrid sensitizers, conversion efficiency of 6.5% is achieved at AM 1.5G 1 sun illumination when it is contacted with iodide-based redox electrolyte. Further improvement is achieved using a hole transport material, where efficiency as high as 9.7% is achieved based on submicron TiO2 layer. Solid-state device shows much better long-term stability than liquid type. For the case of chalcogenide-based quantum dot sensitizers, photocurrent density of 30 mA/cm2 is achieved at 1 sun by controlling metal-sulfur chemical bonding nature. All the demonstrated photovoltaic properties are by far the highest performance among the reported quantum-dot-sensitized solar cells.
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