微纳电子技术

近年来,钙钛矿材料由于其带隙可调、吸收系数高、成本低等优势在国际上备受瞩目。其中,单晶钙钛矿具有优于多晶钙钛矿的光学、电学特性,成为制备高性能光电器件的理想材料。从钙钛矿的基本分子组成和化学结构出发,介绍了单晶钙钛矿的基本光学和电学特性,指出了块状、薄片/薄膜和纳米结构有机-无机杂化单晶钙钛矿的制备方法,总结了它们在光电探测器、太阳电池、光泵浦激光和辐射探测中的应用。最后,对单晶钙钛矿当前研究中所面临的挑战及未来的发展进行展望,指出开发低成本、高稳定性、无毒的单晶钙钛矿光电器件有望加速其商业化进程。

In recent years,perovskite materials have attracted much attention in the world due to their adjustable band-gap,high absorption coefficient and low cost.Compared with polycrystalline perovskites,single crystal perovskites have better optical and electrical properties,which act as an ideal material for preparing optoelectronic devices with high performances.Based on the basic molecular composition and chemical structure of perovskites,the fundamental optical and electrical properties of single crystal perovskites are firstly introduced,and then the preparation methods of bulk,wafer/film and nanostructured organic-inorganic hybrid single crystal perovskites are presented.The research progress in applications of single crystal perovskites in the areas of photodetectors,solar cells,optical pump lasers and radiation detection is reviewed.Finally,the challenges in the current research and future development of single crystal perovskites are prospected,pointing out that developing low-cost,highly stable and non-toxic single crystal perovskite optoelectronic devices can promote its commercialization process.