Realizing a novel dazzling far-red-emitting phosphor NaLaCaTeO6:Mn4+with high quantum yield and luminescence thermal stabilityviathe ionic couple substitution of Na++ La3+for 2Ca2+in Ca3TeO6:Mn4+for indoor plant cultivation LEDs

Li, Kai; Deun, Rik Van

doi:10.1039/c9cc05465k

Cited by 47 publications

(20 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The emission intensity of 679, 696, and 708 nm decreases to 50, 36, and 38%, respectively, when temperature varies from 300 to 463 K. The temperature at which photoluminescence emission intensity reaches 50% of the initial intensity or thermal quenching temperature (T 50 ) is attained around 400 K. Thermal quenching mechanism of Mn 4+ ‐activated phosphors can be well explained using two models viz . nonradiative relaxation and Dorenbos's photoionization model 43–47 . According to nonradiative relaxation model, at higher temperatures electrons in the excited level get pumped to the cross point between 4 T 2g and 4 A 2g levels by absorbing activation energy (∆E) and return to the ground state via a series of nonradiative processes.…”

Section: Resultsmentioning

confidence: 99%

“…nonradiative relaxation and Dorenbos's photoionization model. [43][44][45][46][47] According to nonradiative relaxation model, at higher temperatures electrons in the excited level get pumped to the cross point between 4 T 2g and 4 A 2g levels by absorbing activation energy (∆E) and return to the ground state via a series of nonradiative processes. The thermal activation energy of the SrLaLiTeO 6 :5%Mn 4+ phosphor is calculated using Arrhenius equation given by where I 0 is the initial PL intensity, I T is the PL intensity at a given temperature T, C is a constant, and k is the Boltzmann constant (8.617 × 10 − 5 eV∕K).…”

Section: Crystal Field Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

2021

View full text Add to dashboard Cite

Among the different categories of ceramic compounds, perovskites draw worldwide attention amidst researchers due to their interesting properties such as superconductivity, nonlinear optical properties, photoluminescence, ionic conductivity, ferroelectricity, magnetoresistance, catalytic properties, etc. These versatilities in physical properties lead to the emergence of various functional electronic and optoelectronic devices that are capable of doing much better performance than their predecessors. 1 Due to hundreds of functional halide double perovskites reported over the past few years, the definition of perovskites seems inadequate and hence Song et al. categorize perovskites into three groups based on their structure viz., standard-perovskite (having 3D structure and general formula ABX 3 ), low-dimensional (low-D including 2D, 1D, and 0D) perovskites, and perovskite-like halides. 2 The first two consist of corner sharing or discrete octahedra, whereas the latter consist of edge sharing as well as face sharing octahedra. 2 The possibility of substituting cations in either A site or B site of the basic perovskite structure (ABX 3 ) leads to the formation of complex perovskites or generally double perovskites and falls under the category of "standard perovskite." The modifiability in cationic sites induces the development of new functional materials which further enhance the device properties. 1,2 Luminescence in double perovskites is an irresistible area of research and there are plenty of research articles published every year regarding this intriguing physical property. It has substantial applications in the field of photovoltaic devices, photocatalysis, electronic devices such as capacitors, transducers, sensors, lighting devices, etc. 3-8 Among these,

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Crystal Field Parametersmentioning

confidence: 99%

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

2021

View full text Add to dashboard Cite

show abstract

“…Moreover, Q denotes 6, 8, and 10, corresponding to the dipole-dipole (d-d), dipole-quadrupole (d-q), and quadrupole-quadrupole (q-q) interactions, respectively. 36,37 The dependence of lgI/x on lgx under the 406 nm excitation is displayed in Figure 8C. The slope (−Q/3) is well fitted to −1.41.…”

Section: Optical Propertiesmentioning

confidence: 87%

Novel double‐perovskite Mg₂InSbO₆:Sm³⁺ phosphor with excellent heat‐resistant performance and high color purity used in white LEDs

et al. 2021

View full text Add to dashboard Cite

In this study, Sm 3+ -doped double-perovskite Mg 2 InSbO 6 phosphors were synthesized via high-temperature solid-state reaction. Mg 2 InSbO 6 belongs to the doubleperovskite family with a space group of R3 (No.148). The photoluminescence (PL) spectrum illustrates that Mg 2 InSbO 6 :0.05Sm 3+ phosphor can emit intense orange-red emission light at 607 nm due to the 4 G 5/2 → 6 H 7/2 transition. The optimum concentration of Mg 2 InSbO 6 :xSm 3+ is confirmed to 0.05 mol. The asymmetric ratio ( 4 G 5/2 → 6 H 9/2 / 4 G 5/2 → 6 H 5/2 ) of Mg 2 InSbO 6 :0.05Sm 3+ phosphor is 2.73. The quenching temperature exceeds 500 K, illustrating that Mg 2 InSbO 6 :Sm 3+ sample has excellent heat resistance. The high color purity and correlated color temperature (CCT) of Mg 2 InSbO 6 :Sm 3+ phosphors are obtained. Furthermore, a white light-emitting diode (w-LED) is successfully fabricated, possessing CCT of 6769 K and high color rendering index (R a ) of 89. Therefore, the orange-red-emitting Mg 2 InSbO 6 :Sm 3+ phosphors exhibit great potential to apply in solid-state lighting fields. K E Y W O R D S LED, luminescence, Mg 2 InSbO 6 :Sm 3+ , phosphor | 5967 LIU et aL. | INTRODUCTIONw-LEDs show a high potential application in displays and lighting. In addition, w-LEDs are replacing conventional solid-state lighting sources (fluorescent, incandescent, and metal-halide lamps), which are based on admirable merits, like high efficiency, energy conservation, long lifetimes, and eco-friendliness. [1][2][3][4] Currently, the method to fabricate commercial w-LEDs is a combination of yellow phosphor Y 3 Al 5 O 12 :Ce 3+ (YAG) and a blue LED chip. However, these products show high CCT and poor R a , owing to the lack of red composition. 5,6 These inevitable disadvantages greatly limit their application and popularization. An alternative way is developed using trichromatic (green, blue, and red) phosphors coated on the near-ultraviolet (n-UV) chips, which have recently received increasing attention. 7 Nitride is regarded as an excellent red phosphor like SrLiAl 3 N 4 :Ce 3+ , Sr 2 [BeAl 3 N 5 ]:Eu 2+ , and CaAlSiN 3 :Eu 2+ . 8-10 However, the synthesis condition (high temperature and high pressure) is strict. 11,12 Hence, exploring new orange-red-emitting or redemitting phosphors with good luminescence properties is extremely urgent. 13 Sm 3+ with 4f 5 electronic configuration is an important activator ion among the lanthanoid ions. [14][15][16] Sm 3+ usually exhibits orange-red or red emission in the visible region while excited by n-UV or blue light, which attributes to the 4 G 5/2 → 6 H 7/2 or 4 G 5/2 → 6 H 9/2 transitions, respectively. 17,18

show abstract

“…Alternatively, transition metal‐activated red phosphors were developed whose luminescence lies in the higher wavelength region of red. [ 10,11 ] Recently many vanadates have been reported as self‐activated phosphors without any lanthanide dopant. [ 12–18 ] They exhibit broad emission bands in the visible region from blue to red which makes them suitable as full‐color emission phosphors for WLEDs.…”

Section: Introductionmentioning

confidence: 99%

New lanthanide‐free self‐activated full‐color emission phosphor in Y³⁺ doped Sr₃Bi(VO₄)₃ system for white light emitting diode applications

et al. 2021

View full text Add to dashboard Cite

Commercially used inorganic phosphors heavily depend on lanthanide doped host materials which are becoming more expensive and also their availability is limited due to scarcity. In this regard, a new lanthanide‐free self‐activated full‐color emission phosphor in Y3+ doped Sr3Bi(VO4)3 system was developed by the conventional ceramic route. These phosphors crystallize into a hexagonal‐type palmierite mineral structure. They exhibit broad excitation bands in the wavelength region of 250–400 nm, owing to the charge transfer transitions from both O2− and Bi6s2 electrons to V5+. Upon excitation, these phosphors show bright broad emissions in the 400–750 nm wavelength range, peaking around 535 nm, with a large full width half maximum of 160 nm. The Y substitution allows tuning of the emission from yellowish green to bluish white due to increased distortion of [VO4]3− tetrahedron. Consequently, the CIE color coordinates changed from (0.42, 0.50) to (0.31, 0.35) which lies in the near‐white region in the chromaticity diagram. Thus, the newly developed Y doped Sr3Bi(VO4)3 is a promising lanthanide‐free full‐color emission phosphor for applications in pc‐white light emitting diodes.

show abstract

Realizing a novel dazzling far-red-emitting phosphor NaLaCaTeO₆:Mn⁴⁺with high quantum yield and luminescence thermal stabilityviathe ionic couple substitution of Na⁺+ La³⁺for 2Ca²⁺in Ca₃TeO₆:Mn⁴⁺for indoor plant cultivation LEDs

Abstract: An ionic couple substitution strategy was initiated to explore the novel hosts for Mn4+luminescence in potential plant cultivation LED applications.

Cited by 47 publications

References 27 publications

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

Novel double‐perovskite Mg₂InSbO₆:Sm³⁺ phosphor with excellent heat‐resistant performance and high color purity used in white LEDs

New lanthanide‐free self‐activated full‐color emission phosphor in Y³⁺ doped Sr₃Bi(VO₄)₃ system for white light emitting diode applications

Contact Info

Product

Resources

About

Realizing a novel dazzling far-red-emitting phosphor NaLaCaTeO6:Mn4+with high quantum yield and luminescence thermal stabilityviathe ionic couple substitution of Na++ La3+for 2Ca2+in Ca3TeO6:Mn4+for indoor plant cultivation LEDs

Abstract: An ionic couple substitution strategy was initiated to explore the novel hosts for Mn4+luminescence in potential plant cultivation LED applications.

Cited by 47 publications

References 27 publications

Deep‐red‐emitting SrLaLiTeO6: Mn4+ double perovskites: Correlation between Mn4+‐O2− bonding and photoluminescence

Deep‐red‐emitting SrLaLiTeO6: Mn4+ double perovskites: Correlation between Mn4+‐O2− bonding and photoluminescence

Novel double‐perovskite Mg2InSbO6:Sm3+ phosphor with excellent heat‐resistant performance and high color purity used in white LEDs

New lanthanide‐free self‐activated full‐color emission phosphor in Y3+ doped Sr3Bi(VO4)3 system for white light emitting diode applications

Contact Info

Product

Resources

About

Realizing a novel dazzling far-red-emitting phosphor NaLaCaTeO₆:Mn⁴⁺with high quantum yield and luminescence thermal stabilityviathe ionic couple substitution of Na⁺+ La³⁺for 2Ca²⁺in Ca₃TeO₆:Mn⁴⁺for indoor plant cultivation LEDs

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

Deep‐red‐emitting SrLaLiTeO₆: Mn⁴⁺ double perovskites: Correlation between Mn⁴⁺‐O²⁻ bonding and photoluminescence

Novel double‐perovskite Mg₂InSbO₆:Sm³⁺ phosphor with excellent heat‐resistant performance and high color purity used in white LEDs

New lanthanide‐free self‐activated full‐color emission phosphor in Y³⁺ doped Sr₃Bi(VO₄)₃ system for white light emitting diode applications