Making red emitting phosphors with Pr3+

Boutinaud, Philippe; Pinel, Eric; Oubaha, Mohamed; Mahiou, Rachid; Cavalli, Enrico; Bettinelli, Marco

doi:10.1016/j.optmat.2004.09.027

Cited by 154 publications

(112 citation statements)

References 25 publications

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“…In this line, calculations in order to investigate the virtual recharge mechanism 11,12 and relaxation via intersystem crossing through trapped exciton states 9,10 are underway in our laboratory. Finally, the present calculations do support the interpretation of the 4f 5d…”

Section: Discussionmentioning

confidence: 99%

Ab initio theoretical study of luminescence properties of Pr3+-doped Lu2O3

2011

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Ab initio embedded cluster calculations have been performed on Pr 3+ -doped Lu 2 O 3 , in order to investigate the mechanism responsible for the highly efficient 3 P 0 → 1 D 2 non-radiative relaxation experimentally observed. (PrO 6 ) 9− embedded clusters representing the C 2 and S 6 substitutional sites of Pr 3+ :Lu 2 O 3 have been studied using wave function based methods. It is found that an outwards relaxation of the first coordination sphere around the impurity takes place upon doping.At the relaxed geometry of the lowest spin triplet 4f 5d state, all the 4f 5d states lie much higher in energy than all 4f 2 states (except the 1 S multiplet). This result is in opposition to the interpretation of intersystem crossing through a low-lying 4f 5d excited state of Pr 3+ as the mechanism for the fast non-radiative 3 P 0 → 1 D 2 relaxation proposed in the literature. Absorption to the lowest spin triplet 4f 5d state is calculated to be around 4800 cm −1 higher for the C 2 site than for the S 6 site, supporting the assignment of bands in the excitation spectrum previously reported.

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Section: Discussionmentioning

confidence: 99%

Ab initio theoretical study of luminescence properties of Pr3+-doped Lu2O3

2011

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“…Pr 3+ (4f 2 ) has several transitions leading to emission in the visible part of the spectrum, with green emission originating from the 3 P 0 excited state and red emission from both 3 P 0 and 1 D 2 excited states. The relative intensity is strongly dependent on the type of host material [111]. Adding Pr 3+ to YAG:Ce 3+ slightly increased the color rendering (due to a dominating emission at 610nm), but strongly reduced the overall efficiency of the phosphor [112].…”

Section: +mentioning

confidence: 99%

Selecting Conversion Phosphors for White Light-Emitting Diodes

Smet

Parmentier

Poelman

2011

J. Electrochem. Soc.

695

501

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Light emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu AbstractLight emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu

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“…Trivalent praseodymium (Pr 3? ) ion is continuously considered as a promising activator for solid state lasers, optical amplifiers, scintillation detectors, sensors, quantum memories, solar converters and various phosphors [1][2][3][4]. This is due to various strong emissions, resulting from both inter-configurational d-f and intra-configurational f-f transitions extending from UV to near infrared wavelengths, which could be generated in Pr 3?…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of 3P0 Pr3+ fluorescence dynamics in Y4Al2O9 crystals

Kaczkan¹,

Boruc²,

Fetliński³

et al. 2013

Appl. Phys. B

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Temperature-dependent emission spectra and fluorescence dynamics profiles have been investigated in Pr 3? :Y 4 Al 2 O 9 crystals in order to better understand the processes responsible for quenching of the praseodymium 3 P 0 emissions. The cross-relaxation transfer rates were experimentally determined as a function of temperature. Using the rate equations formalism, the dynamics of the observed emissions were modeled. Basing on comparison between the measured and calculated decays, the energy transfer rates between Pr 3? ions were evaluated. The role of the backward process in explanation of the complicated character of 3 P 0 decays and its temperature dependence, especially its unexpectedly slow decaying component, were established.

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Making red emitting phosphors with Pr3+

Cited by 154 publications

References 25 publications

Ab initio theoretical study of luminescence properties of Pr3+-doped Lu2O3

Ab initio theoretical study of luminescence properties of Pr3+-doped Lu2O3

Selecting Conversion Phosphors for White Light-Emitting Diodes

Temperature dependence of 3P0 Pr3+ fluorescence dynamics in Y4Al2O9 crystals

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