Photoluminescence properties and energy transfer in a novel Sr₈ZnY(PO₄)₇:Tb³⁺,Eu³⁺ phosphor with high thermal stability and its great potential for application in warm white light emitting diodes

Abstract

Energy transfer from Tb3+ to Eu3+ was observed and verified in a warm white light emission phosphor SZYP:Tb3+,Eu3+ with high thermal stability.

Tunable dual‐mode emission with excellent thermal stability in Ca4ZrGe3O12:Eu phosphors prepared in air for NUV‐LEDs

“…It is significant that luminescent intensity of CZGO:0.16Eu at 423 K (150°C) still maintains as much as 91.01% of that measured at room temperature upon 370 nm light irradiation. These results suggest that the as‐prepared phosphors display highly thermal stability, which is superior to that of most reported single‐phased phosphors for UV‐LEDs . The activation energy ( E a ) for thermal quenching of emission of CZGO:0.16Eu can be calculated via Arrhenian Equations,where I 0 and I(T) represent the luminescent intensities at room temperature and different temperatures, respectively.…”

“…These results suggest that the as-prepared phosphors display highly thermal stability, which is superior to that of most reported single-phased phosphors for UV-LEDs. [37][38][39][40][41] The activation energy (E a ) for thermal quenching of emission of CZGO:0.16Eu can be calculated via Arrhenian Equations 31,42 , where I 0 and I(T) represent the luminescent intensities at room temperature and different temperatures, respectively. C corresponds to a constant, while k stands for the Boltzmann constant (8.625 × 10 −5 eV/K).…”

Engineering cation vacancies to improve the luminescence properties of Ca14Al10Zn6O35: Mn4+ phosphors for LED plant lamp

“…At present, the traditional incandescent and fluorescent lamps are restricted in the indoor plant cultivation on account of high energy consumption and environmental pollution. Besides, the emitting spectra of traditional lamps cannot match well with the absorption spectra of plant pigments . Thus, it is necessary to find a suitable luminescent material as a lighting source for plant growth.…”

“…The phosphor‐converted light emitting diodes (pc‐LEDs), as the promising candidates for artificial solid state lighting, are widely applied to the indoor plant cultivation owing to the long service life, high luminous efficiency, low energy consumption and low cost . In pc‐LEDs, a variety of phosphors can be used to adjust the spectra composition so that the integrated spectrum can be overlapped with the absorption bands of several pigments . Normally, the pc‐LEDs for plant growth are combined by the LED chips with far‐red emitting phosphors .…”

Enhancing photoluminescence properties of Mn4+‐activated Sr4−xBaxAl14O25 red phosphors for plant cultivation LEDs

“…With the increasingly serious atmospheric environment, the indoor plant cultivation has been developed because its light source is provided by artificial light source . In comparison to fluorescent lamps, incandescent lamps, high‐pressure sodium lamps and metal halide lamps, the phosphor‐converted light‐emitting diodes (pc‐LEDs) are regarded as a perfect artificial light source for indoor plant cultivation, owing to its excellent characteristic, including high stability, adjustable luminescence spectra, energy saving, environment friendly, long lifetime and smaller volume, etc . Moreover, the phosphors are playing a significant role in pc‐LEDs fields because it directly determines the composition of spectra, chemical and physical stability, luminescence efficiency and lifetime of lamps .…”