论文标题：Top-Down Approaches Towards Single Crystal Perovskite Solar Cells

期刊：Scientific Reports

作者：Johannes Schlipf and Peter Müller-Buschbaum et al

发表时间：2018/03/20

数字识别码：10.1038/s41598-018-23211-x

原文链接：https://www.nature.com/articles/s41598-018-23211-x?utm_source=Other_website&utm_medium=Website_links&utm_content=RenLi-Nature-Scientific_Reports-Materials_Physics-China&utm_campaign=SCIREP_USG_JRCN_RL_solar_sciencenet_article_4th_July

《科学报告》发表的一项研究Top-down approaches towards single crystal perovskite solar cells展示了通过自上而下法来生产可低温加工的单晶钙钛矿太阳能电池。

与现有的薄膜光伏技术相比，杂化钙钛矿材料的引入使得此类太阳能电池在光电转换领域占据了一席之地。目前大多数的光伏器件是从一个透明衬底上一层层叠加起来的（自下而上的方法），而钙钛矿层的沉积过程伴随着许多挑战，包括对晶体大小、成核密度和生长速率的控制。另一方面，采用单晶研究这一种新型光电材料的基本特性方面已经取得了巨大的成功。然而，跟薄膜器件相比，由单晶制备的光电器件往往需要不同的制备材料。

来自德国慕尼黑工业大学的Peter Müller-Buschbaum领导的研究团队，提出了多种自上而下的方法用于制备可低温加工的有机-无机金属卤化物钙钛矿单晶器件。他们的方法采用了成熟的并常被用于多晶薄膜器件的材料组合。通过使用聚合物边框可以更容易地处理小晶体，并由溶液法制备出独立的钙钛矿单晶器件。

总而言之，如同在薄膜器件中，这些方法利用材料组合可以使得很小晶体上的光伏表征成为可能，这些方法从而可以作为其他常常需要钙钛矿单晶来对材料基本属性进行测量的补充手段。

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.

阅读论文全文请访问：https://www.nature.com/articles/s41598-018-23211-x?utm_source=Other_website&utm_medium=Website_links&utm_content=RenLi-Nature-Scientific_Reports-Materials_Physics-China&utm_campaign=SCIREP_USG_JRCN_RL_solar_sciencenet_article_4th_July

期刊介绍：Scientific Reports is 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.

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（来源：科学网）