Investigation of Eu–Mn energy transfer in A3MgSi2O8:Eu2+, Mn2+ (A=Ca,Sr,Ba) for light-emitting diodes for plant cultivation

Ma, Liang; Wang, Dajian; Mao, Zhiyong; Lu, Qi‐fei; Yuan, Zhihao

doi:10.1063/1.2996256

Cited by 107 publications

(56 citation statements)

References 16 publications

(13 reference statements)

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“…Barry [10] proposed that the emission spectrum of these phosphors conform fairly well with the action spectra of chlorophyll synthesis and photosynthesis. We further presented a LED illumination prototype by using these phosphors to combine with nUV chips to construct PAS [11]. The one of critical issues, however, lies in an effective suppression of a very easily formed secondary orthosilicate phases of A 2 SiO 4 for *505 nm green emission coexisting with the magnesium silicate host [12], as experienced by many researchers elsewhere [13][14][15].…”

Section: Introductionmentioning

confidence: 97%

Enhancement of photosynthetic action spectrum for 660 nm-featured phase-pure (Ba,Sr)3MgSi2O8: Eu2+, Mn2+ phosphor by spray-combustion synthesis

Sun

Mao

et al. 2015

J Mater Sci: Mater Electron

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Dual band emissions positioned at both 660 and 430 nm of (Ba, Sr) 3 MgSi 2 O 8 : Eu 2? , Mn 2? phosphor was achieved via spray-combustion synthesis procedure. At a specific limited solid solubility composition Ba 1.3 Sr 1.7 MgSi 2 O 8 , the secondary green-emitting phases of (Ba, Sr) 2 SiO 4 or (Ba, Sr)MgSiO 4 were effectively suppressed to give out the desired 660 nm broad emission. An enhancement of photoluminescence (PL) intensity for 660 nm red emission originated from Mn transition was observed in combustion synthesis samples, indicating an intrinsic promotion of energy transfer from Eu 2? to Mn 2? in (Ba, Sr) 3 MgSi 2 O 8 host. This PL enhancement to 660 nm emission is probably ascribed to an effective reduction of Mn ion in the combustion process with the aid of decomposed reductive radicals formed in situ upon fuel ignition. The crystallized particle size varies in the range from 5 to 20 lm depending on process parameters. A near ultraviolet LED illumination prototype packaged with as-prepared phosphor exhibits to be violet in color. This combustion synthesis process provides an effective means for PL enhancement of phase-pure (Ba,Sr) 3 MgSi 2 O 8 : Eu 2? , Mn 2? phosphors to construct the photosynthetic action spectrum.

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Section: Introductionmentioning

confidence: 97%

Enhancement of photosynthetic action spectrum for 660 nm-featured phase-pure (Ba,Sr)3MgSi2O8: Eu2+, Mn2+ phosphor by spray-combustion synthesis

Sun

Mao

et al. 2015

J Mater Sci: Mater Electron

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“…To solve these problems, glass greenhouses recently have aroused scientists' great interest because of their significant advantages, such as long lifespan, better thermal retardation, excellent chemical durability, and high transparency in the VIS range. Plants can strongly absorb blue (400-500 nm) and red ($ 660 nm) light known as the specific photosynthetic spectrum (PAS), which could dramatically promote their photosynthesis processes [1][2][3]. Moreover, the decreased growth periodicity of green plants such as luxury flowers could bring in vast revenue for planters.…”

Section: Introductionmentioning

confidence: 99%

Multi-wavelength-driven solar spectral conversion in P2O5–ZnO–Li2O glasses for improving greenhouse photosynthetic activity

et al. 2015

Ceramics International

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“…In view of the problems, it is important to investigate a phosphor which is single-host blue-red double emission. We have found an A 3 MgSi 2 O 8 :Eu,Mn(A=Ca,Sr,Ba) phosphor, which is probably applicable for plant cultivation [4][5][6] . However, a critical problem is to enhance the luminous intensity by exploring suitable means.…”

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confidence: 98%

Fluorescence enhancement of single-phase red-blue emitting Ba3MgSi2O8:Eu2+,Mn2+ phosphors via Dy3+ addition for plant cultivation

Liu

Wang

Mao

et al. 2009

Optoelectron. Lett.

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Fluorescence enhancement of red and blue concurrently emitting Ba 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ phosphors for plant cultivation has been investigated by Dy 3+ addition. The Ba 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ ,Dy 3+ (BMS-EMD) phosphors have two-color emissions at the wavelength peak values of 437 nm and 620 nm at the excitation of 350 nm. The two emission bands are coincident with the absorption spectrum for photosynthesis of plants. An obvious enhancement effect has been observed upon addition of Dy 3+ with amount of 0.03 mol%, in which the intensities of both blue and red bands reach a maximum. The origin of red and blue emission bands is analysed. The photochromic parameters of the samples at the nearly UV excitation are tested. This fluoresence enhancement is of great significance for special solid state lighting equipment used in plant cultivation.As artificial lighting for plants, the solid state lighting of lightemitting diodes (LEDs) has attracted considerable interests in order to enhance photosynthesis of plants in recent years [1] . Many plants have grown under the combination illuminators of discrete red and blue LEDs. However,photoelectric properties of LED chips may vary with different temperature, aging time, and drive voltage. Meanwhile,separate LEDs have to be assembled in an array alternately to achieve uniformity of color mixing with blue and red light for plant illuminating [2,3] . In view of the problems, it is important to investigate a phosphor which is single-host blue-red double emission. We have found an A 3 MgSi 2 O 8 :Eu,Mn(A=Ca,Sr,Ba) phosphor, which is probably applicable for plant cultivation [4][5][6] . However, a critical problem is to enhance the luminous intensity by exploring suitable means. Therefore, in the present paper, we will investigate the principle of fluorescence enhancement of this dual band emissions with addition of Dy 3+ . Lin [7] and Sabbagh [8] researched the influence of Dy 3+ on A 3 MgSi 2 O 8 : Eu 2+ (A=Ca, Sr, Ba) blue afterglow phosphor, and demonstrated that the Dy 3+ plays a role of trap level in these phosphors.But, the work on Dy 3+ sensitizing Ba 3 MgSi 2 O 8 :Eu 2+ ,Mn 2+ phosphor is little. In this paper, we focus on the influence of Dy 3+ on the emission intensity in BMS-EMD phosphors, and demonstrate the mechanism of fluorescence enhancement detailedly.A solid-state synthesis procedure was used to prepare the phosphors with nominal compositions of Ba 2.78-x MgSi 2 O 8 : 0.02Eu 2+ , 0.2Mn 2+ , xDy 3+ (x=0.00-0.05 mol %). Analytical reagent chemicals of BaCO 3 , MnCO 3 , NH 4 Cl (flux, mole ratios of NH 4 Cl to SiO 2 of 10),nanosized MgO (99.9 %) and SiO 2 (99.9 %), high-purity Eu 2 O 3 (99.99 %) and Dy 2 O 3 99. 99 % were employed as raw materials. All these raw materials were blended uniformly and fired at 1250°C for 3 h in a flowing reductive atmosphere of a 5% H 2 + 95 % N 2 mixture.The XRD patterns of phosphor particles were characterized by a diffractometer (Rigaku D/max-2500/pc, Cu-Ka = 1.540 62 nm, Japan). Photoluminescence spectra of the samples were...

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Investigation of Eu–Mn energy transfer in A3MgSi2O8:Eu2+, Mn2+ (A=Ca,Sr,Ba) for light-emitting diodes for plant cultivation

Cited by 107 publications

References 16 publications

Enhancement of photosynthetic action spectrum for 660 nm-featured phase-pure (Ba,Sr)3MgSi2O8: Eu2+, Mn2+ phosphor by spray-combustion synthesis

Enhancement of photosynthetic action spectrum for 660 nm-featured phase-pure (Ba,Sr)3MgSi2O8: Eu2+, Mn2+ phosphor by spray-combustion synthesis

Multi-wavelength-driven solar spectral conversion in P2O5–ZnO–Li2O glasses for improving greenhouse photosynthetic activity

Fluorescence enhancement of single-phase red-blue emitting Ba3MgSi2O8:Eu2+,Mn2+ phosphors via Dy3+ addition for plant cultivation

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