Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals
作者： Géraldine Dantelle , Archana Tiwari , Rizvi Rahman , Simon R. Plant , Kyriakos Porfyrakis
DOI: 10.1016/J.OPTMAT.2009.07.021
关键词: Endohedral fullerene 、 Absorption (chemistry) 、 Quantum yield 、 Ion 、 Fullerene 、 Carbon 、 Photoluminescence 、 Physical chemistry 、 Molecular vibration 、 Materials science
摘要: Abstract With the aim of providing a thorough description optical properties Er3+-doped endohedral fullerenes, we studied their characteristics in light those well-known β-PbF2 single-crystals. Various fullerenes were considered: Er2C2@C82, where Er2C2 group is encapsulated inside cage 82 carbon atoms and Er3−xScxN@C80 (x = 0, 1 2) family, Er3N, Er2ScN ErSc2N clusters are trapped 80 atom cage. In this article, discuss absorption photoluminescence trivalent erbium ions crystals. The extinction coefficient Er3N@C80 was found to be 4.8 (±0.5) × 103 mol/l−1 cm−1 at 540 nm, due C80 absorbance. Even saturated fullerene solution, Er3+ cannot observed room temperature. We suggest that an insufficient number solution low cross-section. Low temperature measurements show line width cage, dissolved polycrystalline solvent, similar one quantum efficiency 1.5 μm four orders magnitude lower than for crystals, very efficient non-radiative decay processes. Molecular vibrations might responsible rapid de-excitations.
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