Room-temperature stimulated emission from microcrystalline CsPbCl3 films -: art. no. 131912

Photoluminescence from microcrystalline CsPbCl3 films prepared by crystallization from the amorphous phase is measured under N-2 laser excitation. Stimulated emission due to free exciton-free exciton inelastic collision occurs not only at 77 K (as reported very recently) but also at room temperature (RT). The intensity of the stimulated emission more rapidly increases with pumping intensity at RT than at 77 K, although the threshold is higher at the former temperature (600 kW cm(-2)) than at the latter (240 kW cm(-2)). This demonstration of the stimulated emission at RT from metal halides encourages us to explore laser media in metal halides because of their material abundance. (C) 2005 American Institute of Physics.