Enabling Double Perovskite Solar Cells

混合金属卤化物钙钛矿材料联合收割机结合了低成本元素和简单的溶液沉积，即印刷;以及极高的性能，类似于主流的多晶硅光致发光材料。该材料的特性与行业黄金标准半导体GaAs相似，使其成为一个非常有吸引力的研究领域，全球有数千名研究人员活跃在其中。然而，在该技术商业化之前，需要克服一些挑战：需要解决稳定性和毒性问题。先前试图替换结构中的铅原子的尝试导致较不稳定的系统（Sn）或高度扭曲的材料结构（Bi、Cu等）。其显示出非常低的材料性能和因此低的器件效率。该提案旨在通过开发基于与最先进材料相关的结构的新材料来解决这些挑战：双钙钛矿结构。在这里，铅原子被交替的无毒替代物取代，这些替代物是空气稳定的元素，可以从溶液中处理。在这个第一个赠款项目的具体目标是开发一种新的薄膜沉积技术，这将允许这种类型的新材料纳入功能器件。该项目的成功完成预计将使全球研究人员能够瞄准一系列全新的钙钛矿材料，不仅用于太阳能转换，还用于照明应用。

Hybrid metal halide perovskite materials combine low-cost elements with simple solution deposition, i.e. printing; and extremely high performance, similar to mainstream polycrystalline silicon photovoltaics. The materials properties are additionally similar to industry gold standard semiconductor GaAs, making them a very attractive field of research with thousands of researchers active worldwide. However, some challenges need to be overcome before commercialization of the technology can occur: stability and toxicity concerns need to be addressed. Previous attempts to replace the lead atoms in the structure have either resulted in less stable systems (Sn), or highly distorted material structures (Bi, Cu, etc.) which show very reduced materials properties and consequently low device efficiencies. This proposal seeks to address these challenges by developing new materials based on a structure related to the state-of-the-art materials: the double perovskite structure. Here, the lead atoms are replaced by alternating non-toxic alternatives which are air stable elements and can be processed from solution. Specific objectives in this First Grant Project are to develop a novel thin film deposition technique which will allow the incorporation of this type of new materials into functional devices. The successful completion of the project is expected to enable researchers world-wide to target a whole new range of perovskite materials not just for solar energy conversion but also for lighting applications.