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Vergeer, Peter; Vlugt, Thijs J. H.; Kox, Marianne H. F.; Hertog, Martien I. den; Eerden, J.P.J.M. van der; Meijerink, Andries

doi:10.1103/physrevb.71.014119

Cited by 557 publications

(362 citation statements)

References 38 publications

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“…7 F J multiplet emissions. They are similar to previous measurements on YPO 4 doped with Tb 3+ [14]. Transitions to different ground state terms with J ranging from 5 to 0 are clearly resolved in the spectrum.…”

Section: Cooperative Sensitizationsupporting

confidence: 89%

“…In Fig. 3 (bottom) 4 E g ) occurs, one would expect to observe a Mn 2+ emission band around 560 nm that increases in intensity upon raising the Mn concentration. The absence of a Mn 2+ emission band indicates that energy transfer does not occur.…”

Section: Vacuum Ultraviolet Spectroscopy and Quantum Cuttingmentioning

confidence: 95%

“…When the Yb 3+ concentration is increased, the decay curve decreases more rapidly and it becomes non-exponential. For YbPO 4 4 . This results in an energy-transfer rate of 35 · 10 2 s À1 in YbPO 4 :Tb 3+ 1%.…”

Section: Cooperative Sensitizationmentioning

confidence: 99%

“…The first commercial luminescent material based on lanthanide luminescence was YVO 4 :Eu 3+ . This material was discovered in the early 1960s and found to efficiently convert the energy of high energy electrons into visible (red) light in a color television.…”

Section: Introductionmentioning

confidence: 99%

“…Two specific areas in the field that have recently emerged are the search for more efficient and stable luminescent materials for the conversion of high energy UV (vacuum ultraviolet, VUV) radiation into visible light (for xenon-based fluorescent tubes and plasma display panels) and the conversion of low energy UV or blue light (for white light GaN diodes). The search for new luminescent materials for the conversion of vacuum ultraviolet radiation from a xenon discharge (around 172 nm) into visible light involves research on finding ways for the generation of two visible photons for a single VUV photon [3,4]. This so-called quantum cutting process is possible using the energy level structure of lanthanide ions.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Cooperative Sensitizationsupporting

confidence: 89%

Section: Vacuum Ultraviolet Spectroscopy and Quantum Cuttingmentioning

confidence: 95%