Photoluminescent and electroluminescent characteristics of various Bi-activated niobate-based oxide phosphor thin films

Fukada, Haruki; Konagai, M.; Ueda, Kouhei; Miyata, Toshihiro; Minami, Tadatsugu

doi:10.1016/j.tsf.2009.04.064

Cited by 14 publications

(7 citation statements)

References 6 publications

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“…Thus, niobates are regarded as ideal host materials for luminescence. These materials are applied in the field of X-rays [7,8], and recently they have been reported to be used as ultraviolet luminescent materials [9,10]. Currently, with the development of LED technology, people have been interested in niobates used in the area of LEDs due to their chemical stability and simple process of synthesis.…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes

Tang

et al. 2015

Materials Science-Poland

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InNb 1−x P x O 4 :Eu 3+ red phosphors were synthesized by solid-state reaction and their luminescence properties were also studied through photoluminescence spectra. The excitation and emission spectra make it clear that the as-prepared phosphors can be effectively excited by near-ultraviolet (UV) 394 nm light and blue 466 nm light to emit strong red light located at 612 nm, due to the Eu 3+ transition of 5 D 0 → 7 F 2 . The luminescence intensity is dependent on phosphorus content, and it achieves the maximum at x = 0.4. Excessive phosphorus in the phosphors can result in reduction of luminescence intensity owing to concentration quenching. With the increasing content of phosphorus, the phosphors are prone to emit pure red light. This shows that the InNb 1.6 P 0.4 O 4 :0.04Eu 3+ phosphor may be a potential candidate as a red component for white light emitting-diodes.

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Section: Introductionmentioning

confidence: 99%

Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes

Tang

et al. 2015

Materials Science-Poland

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“…Finally, all the samples were homogeneous and crack free. Figure 5 presents the emission spectra of Lu2O3:Eu 3+ , Bi 3+ at different ratios of PVP/Lu = 1.0, 2.5, 4.0 and 5.0 heat treated at 700 °C upon excitation at 320 nm, in order to promote the energy transfer process from Bi 3+ with 6s 2 configuration is the 1 S0 [43] level, to the Eu 3+ ions. All films presented enhanced the emission bands of Eu 3+ which are attributed to 5 D0 →+ 7 FJ (J = 0, 1, 2, 3 and 4) transitions of europium ions at 581, 596, 610 and 631, 657, and 688 nm, respectively.…”

Section: Morphology Of Thin Filmsmentioning

confidence: 99%

Luminescence Properties of Co-Doped Eu3+, Bi3+ Lu2O3/Polyvinylpyrrolidone Films

et al. 2018

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The effect of the polyvinylpyrrolidone (PVP, MW = 130,000) molar content, PVP/Lu = 1, 2.5, 4 and 5; on the photoluminescent and structural properties of sol-gel derived Lu2O3:Eu3+, Bi3+ has been analyzed. Thin hybrid films were deposited by means of the dip-coating technique on silica quartz substrates. Films deposited at 700 °C presented a cubic structure, with non-preferential orientation, even with the presence of PVP. The photoluminescence (PL) spectrum and Comission Internationale de l’Éclairage (CIE) chromaticity diagram of films revealed a reddish Eu3+ emission at 612 nm (5D0 →7F2) with an excitation at 320 nm of the Bi ions (6s2→6s6p), showing a highly-effective energy transfer process form Bi3+ to Eu3+ luminescent centers. On the other hand, the color temperature of the samples is strongly dependent on the PVP content, as a consequence of the observed difference on the branching ratios of 5D0 →7FJ transitions of europium ions. Lifetime studies present two different behaviors for the thin films: A non-exponential nature for the lower PVP contents, and a simple exponential nature for the highest PVP one, showing that the PVP tends to promote a better dissolution of segregates and, therefore, increases the lifetime of the Eu3+ emission.

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“…The shift of Bi 3+ excitation state results in a large Stokes shift, therefore, the emission band at 490 nm is attributed to 3 P 1 -1 S 0 transitions of Bi 3+ ions in Ca (4), Ca (5) and Ca (6) sits. Because Ca (4), Ca (5) and Ca (6) are even-, eight-and nine-coordinated, and have different average Ca O band distances, multiple emission bands make up 490 nm emission spectra.…”

Section: Photoluminescencementioning

confidence: 99%

“…A lot of literatures shows absorption bands of Bi 3+ are usually attributed to 1 S 0 -1 P 1 and 1 S 0 -3 P 1 transitions that are allowed due to spin-orbit coupling [5,6]. Because the energy level of 3 P 1 excited state is lower than that of 1 P 1 excited state, the emission of Bi 3+ ion is usually a single broad band due * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

The structure and luminescence properties of green Ca3Al2O6:Bi3+ phosphors

Deng

Wang

et al. 2012

Journal of Alloys and Compounds

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Photoluminescent and electroluminescent characteristics of various Bi-activated niobate-based oxide phosphor thin films

Cited by 14 publications

References 6 publications

Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes

Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes

Luminescence Properties of Co-Doped Eu3+, Bi3+ Lu2O3/Polyvinylpyrrolidone Films

The structure and luminescence properties of green Ca3Al2O6:Bi3+ phosphors

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Photoluminescent and electroluminescent characteristics of various Bi-activated niobate-based oxide phosphor thin films

Cited by 14 publications

References 6 publications

Luminescence properties of novel red-emitting phosphor InNb1-xPxO4:Eu3+ for white light emitting-diodes

Luminescence properties of novel red-emitting phosphor InNb1-xPxO4:Eu3+ for white light emitting-diodes

Luminescence Properties of Co-Doped Eu3+, Bi3+ Lu2O3/Polyvinylpyrrolidone Films

The structure and luminescence properties of green Ca3Al2O6:Bi3+ phosphors

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Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes

Luminescence properties of novel red-emitting phosphor InNb_1-xP_xO₄:Eu³⁺ for white light emitting-diodes