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                                                                                                                                                                                                                                                                                                                                世界最高效太陽能電池即將誕生!光電轉化效率十分驚人

                                                                                                                                                                                                                                                                                                                                2017-12-19   |  來源:煒業通科技

                                                                                                                                                                                                                                                                                                                                據物理學家組織網12日報道,美國科學家設計出了一款新型太陽能電池并制造出了模型。這種太陽能電池整合了多塊電池,這些電池堆疊成能捕獲太陽光譜幾乎所有能量的單個設備,可將44.5%的直射太陽光轉化為電力,有潛力成為世界上最高效的太陽能電池,而目前大多數太陽能電池的光電轉化效率僅為25%。

                                                                                                                                                                                                                                                                                                                                不同于我們在屋頂或田間常見的太陽能電池板,新的太陽能電池設計方法使用聚光型太陽能電池(CPV)板,可將太陽光集中在微型太陽能電池(面積不到1平方毫米)上。最重要的優勢有兩點,首先,其基座來自銻化鎵(GaSb)材料家族,這種材料廣泛應用于紅外激光器和光電探測器內。銻化鎵基太陽能電池被組裝成一個堆疊結構,就像過濾太陽光的濾網一樣,每層都有專門材料吸收特定波長的能量。其次,這種堆疊工藝使用所謂的轉移打印技術,使這些小型設備可以精確地立體組裝在一起。

                                                                                                                                                                                                                                                                                                                                該研究主要作者、喬治華盛頓大學的馬修˙魯姆說:“到達地球表面的直射太陽光中,99%的能量位于波長250納米和2500納米的光之間,但傳統的高效多結太陽能電池的材料不能捕獲整個光譜范圍內的所有能量,而新設備可以。”

                                                                                                                                                                                                                                                                                                                                目前這種特殊的太陽能電池由于所用材料昂貴而“身價”不菲,但研究人員相信,它對于研究光電轉化效率的上限非常重要,未來有望降低成本,研制出更廉價的同類產品有望投入市場。

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