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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Polymer-fullerene bulk heterojunction solar cells ： ウィキペディア英語版 Polymer-fullerene bulk heterojunction solar cells Polymer-fullerene bulk heterojunction solar cells are a type of solar cell researched in academic laboratories. Photovoltaic cells featuring a polymeric blend of organics have shown promise in a field largely dominated by inorganic (e.g. silicon) solar cells. Specifically, fullerene derivatives act as electron acceptors for donor materials like P3HT (poly-3-hexyl thiophene-2,5-diyl), creating a polymer-fullerene based photovoltaic cell. Some of the improvements that organic solar cells have over inorganic solar cells are that they are flexible and therefore can be applied to a larger range of surfaces. They can be produced much more easily via inkjet printing or spray deposition, and therefore are vastly cheaper to manufacture. A downside is that, because they are not crystalline (like silicon), but instead are produced in a purposely disordered blend of electron-acceptor and -donor materials (hence the name bulk heterojunction), they have a limited efficiency of charge transport. However, the efficiencies of these new types of photovoltaic cells have risen from 2.5% in 2001, to 5% in 2006, to greater than 10% in 2011. This is because of improved methods for solution processing of acceptor and donor materials that led to more efficient blending of the two materials. Further research can lead to polymer-fullerene based photovoltaic cells that near the efficiency of current inorganic photovoltaic cells. ==Structure== Materials used in polymer-based photovoltaic cells are characterized by their total electron affinities and absorption power. The electron-rich, donor materials tend to be conjugated polymers with relatively high absorption power, whereas the acceptor in this case is a highly symmetric fullerene molecule with a strong affinity for electrons, ensuring sufficient electron mobility between the two.〔 The arrangement of materials essentially determines the overall efficiency of the heterojunction solar cell. There are three donor-acceptor bulk morphologies: (a) the bilayer, (b) the bulk heterojunction, and (c) the “comb” structure. Typically, a polymer-fullerene bulk heterojunction solar cell has a layered structure. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Polymer-fullerene bulk heterojunction solar cells」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.