Rare-earth and transition metal ion single-/co-doped double-perovskite tantalate phosphors: Validation of suitability for versatile applications

Yongbin Hua; Jae Su Yu; Li Li

doi:10.26599/JAC.2023.9220731

| Sign up

PDF (3.1 MB)

Cite

EndNote(RIS) BibTeX

Collect

Submit Manuscript

Show Outline

Figures (10)

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Tables (3)

Table 1

Table 2

Table 3

Research Article | Open Access

Rare-earth and transition metal ion single-/co-doped double-perovskite tantalate phosphors: Validation of suitability for versatile applications

Yongbin Hua^{^a}, Jae Su Yu^{^a}(), Li Li^{^b}()

aDepartment of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si 17104, Republic of Korea

bSchool of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Show Author Information

Graphical Abstract

View original image Download original image

Abstract

Novel rare-earth (RE; e.g., europium (Eu³⁺), samarium (Sm³⁺), and praseodymium (Pr³⁺)) and transition metal (TM⁴⁺; e.g., manganese (Mn⁴⁺)) ion single-/co-doped double-perovskite Ca₂InTaO₆ (CITO) phosphors were prepared and investigated with respect to their crystal structure and photoluminescence (PL) properties. Among them, the CITO:Eu³⁺ phosphors were found to exhibit an ultra-high internal PL quantum yield (89.1%) and good thermal stability (78.7% at 423 K relative to the initial value at 303 K). As such, the corresponding packaged white light-emitting diode (LED) was able to display a remarkable color rendering index (CRI; = 91.51@10 mA). Besides, the potential in applications of anti-counterfeiting fields and a novel LED structure based on flexible phosphor-converted films was also studied. Moreover, due to their different thermal quenching, trivalent lanthanide (Ln³⁺)/Mn⁴⁺ co-doped CITO phosphors were designed for optical thermometry based on the luminescence intensity ratio (LIR) between different 4f transitions of various Ln³⁺ ions and ²E_g → ⁴A_2g (Mn⁴⁺) transition. Particularly, the LIR between the ⁴G_5/2 → ⁶H_9/2 and ²E_g → ⁴A_2g peaks of the CITO activated with 5 mol% Sm³⁺ and 0.3 mol% Mn⁴⁺ exhibited the most excellent relative sensitivity (S_r; = 3.80 %·K⁻¹) with beneficial temperature uncertainty of 0.0648 K. Overall, these results are of significance to offer valuable databases for constructing multifunctional high-performance optical platforms using single-/co-doped double-perovskite tantalates.

Keywords

phosphors quantum yields (QYs)light-emitting diodes (LEDs)thermometry anti-counterfeiting

Electronic Supplementary Material

Download File(s)

JAC0731_ESM.pdf (446 KB)

References

[1]

Cai

, Yang

, Liu

, et al. Synthesis of the red-emitting (Ba,Ca)₂ScAlO₅:Eu³⁺ phosphors with photoluminescence properties. Inorg Chem 2022, 61: 8529–8539.

	CITO:0.4Eu³⁺/0.003Mn⁴⁺	CITO:0.05Sm³⁺/0.003Mn⁴⁺	CITO:0.05Pr³⁺/0.003Mn⁴⁺
Radiation	Cu Kα1 radiation	Cu Kα1 radiation	Cu Kα1 radiation
2θ range (°)	5–100	5–100	5–100
Structure	Monoclinic (P21/n (14))	Monoclinic (P21/n (14))	Monoclinic (P21/n (14))
Lattice parameter and V	a = 5.5596 Å	a = 5.5476 Å	a = 5.5504 Å
	b = 5.7749 Å	b = 5.7319 Å	b = 5.7323 Å
	c = 7.9972 Å	c = 7.9573 Å	c = 7.9596 Å
	α = 90.0000°	α = 90.0000°	α = 90.0000°
	β = 90.1400°	β = 89.9225°	β = 89.9077°
	γ = 90.0000°	γ = 90.0000°	γ = 90.0000°
	V ≈ 256.7592 Å³	V ≈ 253.0285 Å³	V ≈ 253.2471 Å³

Sample	Name	Fractional coordinate			Site
CITO:0.4Eu³⁺/0.003Mn⁴⁺	Ca	0.490158	−0.055619	0.255192	4e
	In/Eu	0.000000	0.000000	0.000000	2a
	Ta/Mn	0.000000	0.000000	0.500000	2b
	O(1)	0.313088	0.807468	0.936875	4e
	O(2)	0.198875	0.299844	0.938583	4e
	O(3)	0.109957	0.043604	0.257094	4e
CITO:0.05Sm³⁺/0.003Mn⁴⁺	Ca	0.518669	−0.059376	0.258348	4e
	In/Eu	0.000000	0.000000	0.000000	2a
	Ta/Mn	0.000000	0.000000	0.500000	2b
	O(1)	0.329799	0.787785	0.947115	4e
	O(2)	0.217124	0.309791	0.941128	4e
	O(3)	0.115483	0.032295	0.245014	4e
CITO:0.05Pr³⁺/0.003Mn⁴⁺	Ca	0.519896	−0.053364	0.252512	4e
	In/Eu	0.000000	0.000000	0.000000	2a
	Ta/Mn	0.000000	0.000000	0.500000	2b
	O(1)	0.315842	0.783506	0.942549	4e
	O(2)	0.205211	0.316280	0.944483	4e
	O(3)	0.107739	0.042657	0.258505	4e

White LED	Current (mA)	Chromaticity coordinate	CRI	CCT (K)
~385 nm chip	10	(0.3267, 0.3422)	83.26	5757
	50	(0.3263, 0.3358)	80.59	5784
	100	(0.3257, 0.3314)	78.87	5819
~405 nm chip	10	(0.3532, 0.3984)	91.51	4886
	50	(0.3541, 0.3918)	90.32	4836
	100	(0.3544, 0.3891)	89.78	4819