Cr3+/Er3+ co-doped LaAlO3 perovskite phosphor: a near-infrared persistent luminescence probe covering the first and third biological windows
We have developed a novel persistent phosphor of LaAlO 3 perovskite doped with Er 3+ , Cr 3+ , and Sm 3+ (LAO:Er-Cr-Sm), which exhibits long persistent luminescence (PersL) at 1553 nm due to the Er 3+ : 4 I 13/2 → 4 I 15/2 transition as well as at 734 nm due to the Cr 3+ : 2 E( 2 G) → 4 A 2 ( 4 F) t...
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| Published in | Journal of materials chemistry. B, Materials for biology and medicine Vol. 5; no. 31; pp. 6385 - 6393 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
21.08.2017
|
| Online Access | Get full text |
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| Summary: | We have developed a novel persistent phosphor of LaAlO
3
perovskite doped with Er
3+
, Cr
3+
, and Sm
3+
(LAO:Er-Cr-Sm), which exhibits long persistent luminescence (PersL) at 1553 nm due to the Er
3+
:
4
I
13/2
→
4
I
15/2
transition as well as at 734 nm due to the Cr
3+
:
2
E(
2
G) →
4
A
2
(
4
F) transition. The intense near-infrared (NIR) PersL bands from Cr
3+
and Er
3+
match well with the first (NIR-I, 650-950 nm) and third (NIR-III, 1500-1800 nm) biological windows as well as response curves of commercial Si and InGaAs detectors. The photon emission rates of Cr
3+
(6.06 × 10
16
cps sr
−1
m
−2
) and Er
3+
(3.69 × 10
16
cps sr
−1
m
−2
) at 60 min after ceasing ultraviolet (UV) illumination were comparable with that of the widely used ZnGa
2
O
4
:Cr
3+
red persistent phosphor (5.41 × 10
16
cps sr
−1
m
−2
). Furthermore, we also show the first
in vitro
autofluorescence-free imaging through pork tissues by Si/InGaAs cameras monitoring Cr
3+
/Er
3+
PersL, and demonstrate that the Er
3+
emission can achieve higher spatial resolution than the Cr
3+
emission due to the reduced light scattering at longer wavelengths. It is indicated that this material can act as a promising bio-probe for
in vivo
optical imaging, especially in the NIR-III biological window.
We have developed a novel persistent phosphor of LaAlO
3
perovskite doped with Er
3+
, Cr
3+
and Sm
3+
(LAO:Er-Cr-Sm), which exhibits long persistent luminescence (PersL) at 1553 nm due to the Er
3+
:
4
I
13/2
→
4
I
15/2
transition as well as at 734 nm due to the Cr
3+
:
2
E(
2
G) →
4
A
2
(
4
F) transition. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 2050-750X 2050-7518 |
| DOI: | 10.1039/c7tb01332a |