Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals
With the aim of providing a thorough description of the optical properties of Er3+-doped endohedral fullerenes, we studied their characteristics in the light of those of well-known Er3+-doped β-PbF2 single-crystals. Various Er3+-doped endohedral fullerenes were considered: Er2C2@C82, where the Er2C2...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1826270460788080640 |
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| author | Dantelle, G Tiwari, A Rahman, R Plant, SR Porfyrakis, K Mortier, M Taylor, R Briggs, G |
| author_facet | Dantelle, G Tiwari, A Rahman, R Plant, SR Porfyrakis, K Mortier, M Taylor, R Briggs, G |
| author_sort | Dantelle, G |
| collection | OXFORD |
| description | With the aim of providing a thorough description of the optical properties of Er3+-doped endohedral fullerenes, we studied their characteristics in the light of those of well-known Er3+-doped β-PbF2 single-crystals. Various Er3+-doped endohedral fullerenes were considered: Er2C2@C82, where the Er2C2 group is encapsulated inside a cage of 82 carbon atoms and the Er3-xScxN@C80 (x = 0, 1 and 2) family, where the Er3N, Er2ScN and ErSc2N clusters are trapped in a 80 carbon atom cage. In this article, we discuss the absorption and photoluminescence of trivalent erbium ions in fullerenes and in β-PbF2 crystals. The extinction coefficient of Er3N@C80 was found to be 4.8 (±0.5) × 103 mol/l-1 cm-1 at 540 nm, due to the C80 cage absorbance. Even in a saturated fullerene solution, the absorption of Er3+ encapsulated inside a C80 cage cannot be observed at room temperature. We suggest that this is due to an insufficient number of Er3+ ions in the solution and their low absorption cross-section. Low temperature photoluminescence measurements show that the line width of Er3+ in a carbon cage, dissolved in a polycrystalline solvent, is similar to the one of Er3+ in β-PbF2 single-crystals. The quantum efficiency of Er3+ at 1.5 μm in fullerenes is four orders of magnitude lower than that for Er3+ in crystals, due to very efficient non-radiative decay processes. Molecular vibrations of the cage might be responsible for those rapid non-radiative de-excitations. © 2009 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-06T21:41:11Z |
| format | Journal article |
| id | oxford-uuid:47fca028-4066-427f-9548-640ccb53f07d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:41:11Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:47fca028-4066-427f-9548-640ccb53f07d2022-03-26T15:23:04ZOptical properties of Er3+ in fullerenes and in β-PbF2 single-crystalsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:47fca028-4066-427f-9548-640ccb53f07dEnglishSymplectic Elements at Oxford2009Dantelle, GTiwari, ARahman, RPlant, SRPorfyrakis, KMortier, MTaylor, RBriggs, GWith the aim of providing a thorough description of the optical properties of Er3+-doped endohedral fullerenes, we studied their characteristics in the light of those of well-known Er3+-doped β-PbF2 single-crystals. Various Er3+-doped endohedral fullerenes were considered: Er2C2@C82, where the Er2C2 group is encapsulated inside a cage of 82 carbon atoms and the Er3-xScxN@C80 (x = 0, 1 and 2) family, where the Er3N, Er2ScN and ErSc2N clusters are trapped in a 80 carbon atom cage. In this article, we discuss the absorption and photoluminescence of trivalent erbium ions in fullerenes and in β-PbF2 crystals. The extinction coefficient of Er3N@C80 was found to be 4.8 (±0.5) × 103 mol/l-1 cm-1 at 540 nm, due to the C80 cage absorbance. Even in a saturated fullerene solution, the absorption of Er3+ encapsulated inside a C80 cage cannot be observed at room temperature. We suggest that this is due to an insufficient number of Er3+ ions in the solution and their low absorption cross-section. Low temperature photoluminescence measurements show that the line width of Er3+ in a carbon cage, dissolved in a polycrystalline solvent, is similar to the one of Er3+ in β-PbF2 single-crystals. The quantum efficiency of Er3+ at 1.5 μm in fullerenes is four orders of magnitude lower than that for Er3+ in crystals, due to very efficient non-radiative decay processes. Molecular vibrations of the cage might be responsible for those rapid non-radiative de-excitations. © 2009 Elsevier B.V. All rights reserved. |
| spellingShingle | Dantelle, G Tiwari, A Rahman, R Plant, SR Porfyrakis, K Mortier, M Taylor, R Briggs, G Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title | Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title_full | Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title_fullStr | Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title_full_unstemmed | Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title_short | Optical properties of Er3+ in fullerenes and in β-PbF2 single-crystals |
| title_sort | optical properties of er3 in fullerenes and in β pbf2 single crystals |
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