Fig. 2: Two way energy transfer in optically active LnNP@CsPbBr3 heterostructures.
From: Overcoming lattice mismatch for core-shell NaGdF4@CsPbBr3 heterostructures
a HAADF-STEM image of β-LnNP@CsPbBr3 heterostructures. b Corresponding EDS elemental mapping of these heterostructures and FFT images to show the phases. c NIR downconversion emission spectra of α/β-LnNP@CsPbBr3 heterostructures under 365 nm laser excitation under the same measurement conditions (concentration of 50 mg mL−1). d GSB kinetics of CsPbBr3 NCs and α/β-LnNP@CsPbBr3 heterostructures under 400 nm pump at a fluence of 23.1 µJ cm−2. e Normalized upconversion emission spectra of α/β-LnNP@CsPbBr3 heterostructures under 980 nm laser excitation. Comparison of upconversion emission spectra of β-LnNPs and β-LnNP@CsPbBr3 heterostructures under 980 nm laser excitation (at a power density of 2 W cm−2) with reaction temperature at f 210 and g 220 °C. Simplified two-way energy transfer pathways under h 365 and i 980 nm excitation. Source data are provided as a Source Data file.
