自上而下法：製備單晶鈣鈦礦太陽能電池

論文標題：Top-Down Approaches Towards Single Crystal Perovskite Solar Cells

作者：Johannes Schlipf and Peter Müller-Buschbaum et al

數字識別碼：10.1038/s41598-018-23211-x

《科學報告》發表的一項研究Top-down approaches towards single crystal perovskite solar cells展示了通過自上而下法來生產可低溫加工的單晶鈣鈦礦太陽能電池。

與現有的薄膜光伏技術相比，雜化鈣鈦礦材料的引入使得此類太陽能電池在光電轉換領域佔據了一席之地。目前大多數的光伏器件是從一個透明襯底上一層層疊加起來的（自下而上的方法），而鈣鈦礦層的沉積過程伴隨著許多挑戰，包括對晶體大小、成核密度和生長速率的控制。另一方面，採用單晶研究這一種新型光電材料的基本特性方面已經取得了巨大的成功。然而，跟薄膜器件相比，由單晶製備的光電器件往往需要不同的製備材料。

來自德國慕尼黑工業大學的Peter Müller-Buschbaum領導的研究團隊，提出了多種自上而下的方法用於製備可低溫加工的有機-無機金屬鹵化物鈣鈦礦單晶器件。他們的方法採用了成熟的並常被用於多晶薄膜器件的材料組合。通過使用聚合物邊框可以更容易地處理小晶體，並由溶液法製備出獨立的鈣鈦礦單晶器件。

總而言之，如同在薄膜器件中，這些方法利用材料組合可以使得很小晶體上的光伏表徵成為可能，這些方法從而可以作為其他常常需要鈣鈦礦單晶來對材料基本屬性進行測量的補充手段。

摘要：Solar cells employing hybrid perovskites have proven to be a serious contender versus established thin-film photovoltaic technologies. Typically, current photovoltaic devices are built up layer by layer from a transparent substrate (bottom-up approach), while the deposition of the perovskite layer itself comes with many challenges including the control of crystal size, nucleation density and growth rate. On the other hand, single crystals have been used with great success for studying the fundamental properties of this new class of optoelectronic materials. However, optoelectronic devices fabricated from single crystals often employ different materials than in their thin film counterparts. Here, we demonstrate various top-down approaches for low-temperature processed organic-inorganic metal halide perovskite single crystal devices. Our approach uses common and well-established material combinations that are often used in polycrystalline thin film devices. The use of a polymer bezel allows easier processing of small crystals and the fabrication of solution-processed, free-standing perovskite single crystal devices. All in all these approaches can supplement other measurements of more fundamental material properties often requiring perovskite single crystals by rendering a photovoltaic characterization possible on the very same crystal with comparable material combinations as in thin film devices.

期刊介紹：Scientific Reportsis an online, open access journal from the publishers of Nature. We publish scientifically valid primary research from all areas of the natural and clinical sciences.

The 2016 journal metrics for Scientific Reports are as follows:

?2-year impact factor: 4.259

?5-year impact factor: 4.847

?Immediacy index: 0.647

喜歡這篇文章嗎？立刻分享出去讓更多人知道吧！