FABRICATION OF PEROVSKITE PERIODIC ARRAYS FOR OPTOELECTRONIC APPLICATIONS

A solid-liquid-solid phase transformation (SLSPT) approach is used for fabrication of perovskite periodic nanostructures. The pattern on a mold is replicated by perovskite through phase change of perovskite from initially solid state, then to liquid state, and finally to solid state. The LED comprising perovskite periodic nanostructure shows better performance than that with flat perovskite. Further, the perovskite periodic nanostructure from SLSPT can be applied in many optoelectronic devices, such as solar cells, light emitting diodes (LED), laser diodes, transistors, and photodetectors. 本发明涉及固-液-固相变(SLSPT)方法用于制造钙钛矿周期性纳米结构。通过钙钛矿从初始固态到液态最后到固态的相变，将模具上的图案通过钙钛矿复制。包含钙钛矿周期性纳米结构的LED显示出比具有平坦钙钛矿的LED更好的性能。此外，来自SLSPT的钙钛矿周期性纳米结构可以应用于许多光电设备，例如太阳能电池、发光二极管(LED)、激光二极管、晶体管和光电探测器。