Optical properties of perturbed NO
2
?
ions in KNO2 doped NaNO2 single crystals |
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Authors: | Carola Kryschi |
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Institution: | (1) Lehrstuhl für Festkörperspektroskopie (IPkM), Heinrich-Heine-Universität, D-4000 Düsseldorf, Federal Republic of Germany |
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Abstract: | Summary On the basis of high-resolution and time-resolved fluorescence spectra, a model is proposed for the interpretation of the fluorescence lines originating from various perturbed NO
2
–
centers situated in the neighbourhood of the K+ ion of the NaNO2:KNO2 crystal. Since their excited state energies are lower than that of the host, these perturbed NO
2
–
ions act as traps for the host singlet exciton. On the assumption that the perturbation giving rise to those traps results from an interaction of the impurity ion K+ with its nearest neighbours, the observed position of the energy levels of the various traps can be reconciled with crystal field calculations. |
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Keywords: | NO
2
– ions KNO2 doped NaNO2 single crystals Time-resolved fluorescence |
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