Room temperature two-photon-pumped random lasers in FAPbBr₃/polyethylene oxide (PEO) composite perovskite thin film.

ABSTRACT: Solution-processed organic-inorganic halide lead perovskites have attracted increasing attention due to their great potential in low-cost, effective, and versatile light emission applications and large-scale portable optoelectronic devices. In this paper, formamidinium lead tribromide perovskite thin films composited with polyethylene oxide (PEO) were fabricated by a solution processing method. Great enhancement of photoluminescence was observed and more attractively, two-photon-pumped random lasing action could be achieved at room temperature when pumped by a nanosecond pulse laser with excitation wavelength centered at 1064 nm. Evident transition from spontaneous upconversion emission to random lasing action was investigated by monitoring the log-log light emission slope and peak width a

SUBMITTER: Xu L 

PROVIDER: S-EPMC9088892 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature