Phonon Sidebands, Multiphonon Relaxation of Excited States, and Phonon-Assisted Energy Transfer between Ions in Solids

Miyakawa, Toru; Dexter, D. L.

doi:10.1103/physrevb.1.2961

Cited by 931 publications

(372 citation statements)

References 21 publications

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“…The theory of phonon-assisted energy transfer was first developed by Orbach [21] and then worked out in detail by Miyakawa and Dexter [22], followed by Holstein et al [23,24]. We have tried to fit the experimental data …”

Section: Discussionmentioning

confidence: 99%

Luminescence and energy migration in a two-dimensional system: NaEuTiO4

Berdowski

Blasse

1984

Journal of Luminescence

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Energy transfer processes in compounds NaGd1~Eu~TiO4(0 cx~1) have been evaluated. It is shown that in these compounds energy migration to quenching centres occurs down to the lowest temperatures if x > 0.3. Transfer from intrinsic Eu 3~ions to extrinsic Eu3 + ions has been observed. The nature of quenching centres and trap centres has been clarified. The characteristics of the energy migration processes can be explained using a two-dimensional diffusion model. The temperature dependence of the hopping rate can be explained assuming phonon-assisted energy transfer.

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Section: Discussionmentioning

confidence: 99%

Luminescence and energy migration in a two-dimensional system: NaEuTiO4

Berdowski

Blasse

1984

Journal of Luminescence

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“…5 that both the emission intensity of 1.46 m and 1.53 m depend on the temperature, nevertheless, in lower temperature below 100 K, it is almost no change for the emission intensities for both the 3 H 4 → 3 F 4 (1.46 m) and 4 I 13/2 → 4 I 15/2 (1.53 m) transitions. In higher temperature above 100 K, the emission intensities decrease with the increasing of temperature, and it can be noted that the emission intensity of 1.53 m deceases much drastical than that of 1.46 m, and the two intensities become nearly equal to unity at 300 K. The temperature dependence of the emission spectra can be understood by considering the phonon assistant energy transfer (ET) rate, which is given by Miyakawa-Dexter theory [28,29],…”

Section: Emission Spectra At Room Temperaturementioning

confidence: 99%

Broadband near-infrared emission in Er3+–Tm3+ co-doped bismuthate glasses

Fan

Zhang

et al. 2011

Journal of Alloys and Compounds

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“…Energy transfer in powders of Yb x Y (1Àx) PO 4 doped with 1% Tb 3+ is studied by emission, excitation and time-resolved luminescence measurements. The time-resolved luminescence measurements are compared with theories for phonon-assisted energy transfer [12] and second-order downconversion through a cooperative or an accretive energy-transfer mechanism [13] by exact calculations and simulations using Monte Carlo methods.…”

Section: Cooperative Sensitizationmentioning

confidence: 99%

Photon management with lanthanides

et al. 2006

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Efficient conversion of photons from high energy radiation (e.g. ultraviolet or X-rays) to lower energies (visible) has been optimized by using luminescent materials based on the optical properties of lanthanide ions. Presently, luminescent materials with efficiencies close to the theoretical maximum are applied in e.g. fluorescent tubes, X-ray imaging and color television. Contrary to the mature status of luminescent materials in these fields, areas requiring new luminescent materials are emerging. There is great challenge in research on upand downconversion materials and lanthanide ions are the prime candidates to achieve efficient materials. Here downconversion processes will be discussed for VUV phosphors with Pr 3+ . The efficiency of resonant energy transfer of the 1 S 0 -1 I 6 energy from Pr 3+ to Eu 3+ and Mn 2+ is investigated. The aim is to convert the 405 nm photon of the first step of the well-known cascade emission of Pr 3+ into a more useful visible photon. For co-doping with Eu 3+ it is observed that the Pr 3+ emission is quenched, most probably through a metal-to-metal charge-transfer state. The energy transfer from Pr 3+ to Mn 2+ is found to be inefficient.An alternative for downconversion through resonant energy transfer is the non-resonant process of cooperative sensitization. For the Tb-Yb couple efficient cooperative energy transfer from the 5 D 4 level of Tb 3+ to two Yb 3+ neighbors is observed with a transfer rate of 0.26 ms À1 . This corresponds to an upper limit of 188% for the conversion efficiency of visible (490 nm) photons to infrared ($1000 nm) photons.

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Phonon Sidebands, Multiphonon Relaxation of Excited States, and Phonon-Assisted Energy Transfer between Ions in Solids

Cited by 931 publications

References 21 publications

Luminescence and energy migration in a two-dimensional system: NaEuTiO4

Luminescence and energy migration in a two-dimensional system: NaEuTiO4

Broadband near-infrared emission in Er3+–Tm3+ co-doped bismuthate glasses

Photon management with lanthanides

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