Fig. 2 | Nature Communications

Fig. 2

From: Sr[Li2Al2O2N2]:Eu2+—A high performance red phosphor to brighten the future

Fig. 2

Scanning transmission electron microscopy combined with energy-dispersive X-ray spectroscopy (STEM/EDX) and time of flight secondary ion mass spectrometry (ToF-SIMS) analyses of SALON. a Qualitative false-colour representation of the lateral distribution of the elements Sr, Al, O, and N. b Qualitative false-colour representation of the lateral distribution of the elements Li and Cu for a Sr[Li2Al2O2N2]:Eu2+ phosphor particle that has been placed into a pocket of a copper transmission electron microscopy grid with 50 µm mesh width. c Time of flight mass spectrometry depth profile of the Li+ secondary ions signal intensities in Sr[LiAl3N4] and Sr[Li2Al2O2N2], divided by the respective signal intensities of the Sr+ secondary ions. Below the particle surface, the normalized signal intensities approach a linear level (further details are provided in the Method section)

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