淺談鈣鈦礦材料雷射發光特性之操控

Controlling Lasing Action of Organometal Halide Proveskites

溶液製程鈣鈦礦材料近年來被應用於太陽能電池上展現出極為優異的光電轉換效率，而且研究進展非常迅速，其優異的特性來自於其特殊的晶體構造與載子對光子的強力作用。此外，在近期的研究中也發現溶液製程鈣鈦礦材料可應用於發光元件。由於此材料可以溶液製程的方式製作，其成本低廉，又可應用於各種基板上，極有潛力可以發展出新一代的光電元件。 Solution-processed organic-inorganic perovskites are fascinating for their remarkable photo-conversion effi ciency and great potentials in the cost-effective and large-scale manufacturing of flexible optoelectronics devices. In this work, we discuss the manipulation of perovskite nanocrystal sizes and the feasible tunability of the lasing performance. Also, a promising post-processing method to promote the lasing performance of organometal halide perovskites is proposed and demonstrated. With the adding Ag and PMMA thin fi lms, the threshold excitation power for lasing action in perovskites can be greatly reduced due to the strong exciton-plasmon coupling between the Ag and perovskite fi lms. The advantages exhibited by the hybrid perovskite confi guration would be very promising in making practical light-emitting and lasing devices.