Near-infrared-triggered photon upconversion tuning in all-inorganic cesium lead halide perovskite quantum dots.

ABSTRACT: All-inorganic CsPbX₃ (X = Cl, Br, and I) perovskite quantum dots (PeQDs) have shown great promise in optoelectronics and photovoltaics owing to their outstanding linear optical properties; however, nonlinear upconversion is limited by the small cross-section of multiphoton absorption, necessitating high power density excitation. Herein, we report a convenient and versatile strategy to fine tuning the upconversion luminescence in CsPbX₃ PeQDs through sensitization by lanthanide-doped nanoparticles. Full-color emission with wavelengths beyond the availability of lanthanides is achieved through tailoring of the PeQDs bandgap, in parallel with the inherent high conversion efficiency of energy transfer upconversion under low power density excitation. Importantly, the lumin

SUBMITTER: Zheng W 

PROVIDER: S-EPMC6110834 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature