Abstract
Mn4+-activated oxide phosphors La(MgTi)1/2O3 (LMT) with far-red emitting were prepared via a sol-gel route. The structures of samples were determined by X-ray diffraction (XRD) and Reitveld refinement. The occupied sites of Mn4+ (d3 electronic configuration) in host La(MgTi)1/2O3 were confirmed by ab initio calculations in which the system has the lower formation energy, stable lattice structure, and strong bonding state as Mn4+ enters into Ti site. The luminescent properties of Mn4+-doped samples were investigated; the samples emit far-red light centered at 708 nm with ultraviolet light (345 nm) or blue light (487 nm) excitation. According to the photoluminescence (PL) and excitation (PLE) spectra, the crystal field strength of the Mn4+-occupied environment was estimated. The thermal stability of phosphor was also evaluated through temperature-dependent PL intensity in a heating and cooling cycle process. The emission band is well-matched with the absorption band of phytochrome PFR under the excitation of light in near-ultraviolet to blue, which suggests that the LMT: Mn4+ phosphor has great potential applications in light-emitting diodes (LEDs) for modulating plant growth.
| Language | English |
|---|---|
| Pages | 6177-6185 |
| Number of pages | 9 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 9 |
| Issue number | 7 |
| DOIs | |
| State | Published - 22 Feb 2017 |
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Ab initio site occupancy and far-red emission of Mn4+ in cubic-phase La(MgTi)1/2O3 for plant cultivation. / Zhou, Ziwei; Zheng, Jiming; Shi, Rui; Zhang, Niumiao; Chen, Jiayu; Zhang, Ruoyu; Suo, Hao; Goldys, Ewa M.; Guo, Chongfeng.
In: ACS Applied Materials and Interfaces, Vol. 9, No. 7, 22.02.2017, p. 6177-6185.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ab initio site occupancy and far-red emission of Mn4+ in cubic-phase La(MgTi)1/2O3 for plant cultivation
AU - Zhou,Ziwei
AU - Zheng,Jiming
AU - Shi,Rui
AU - Zhang,Niumiao
AU - Chen,Jiayu
AU - Zhang,Ruoyu
AU - Suo,Hao
AU - Goldys,Ewa M.
AU - Guo,Chongfeng
PY - 2017/2/22
Y1 - 2017/2/22
N2 - Mn4+-activated oxide phosphors La(MgTi)1/2O3 (LMT) with far-red emitting were prepared via a sol-gel route. The structures of samples were determined by X-ray diffraction (XRD) and Reitveld refinement. The occupied sites of Mn4+ (d3 electronic configuration) in host La(MgTi)1/2O3 were confirmed by ab initio calculations in which the system has the lower formation energy, stable lattice structure, and strong bonding state as Mn4+ enters into Ti site. The luminescent properties of Mn4+-doped samples were investigated; the samples emit far-red light centered at 708 nm with ultraviolet light (345 nm) or blue light (487 nm) excitation. According to the photoluminescence (PL) and excitation (PLE) spectra, the crystal field strength of the Mn4+-occupied environment was estimated. The thermal stability of phosphor was also evaluated through temperature-dependent PL intensity in a heating and cooling cycle process. The emission band is well-matched with the absorption band of phytochrome PFR under the excitation of light in near-ultraviolet to blue, which suggests that the LMT: Mn4+ phosphor has great potential applications in light-emitting diodes (LEDs) for modulating plant growth.
AB - Mn4+-activated oxide phosphors La(MgTi)1/2O3 (LMT) with far-red emitting were prepared via a sol-gel route. The structures of samples were determined by X-ray diffraction (XRD) and Reitveld refinement. The occupied sites of Mn4+ (d3 electronic configuration) in host La(MgTi)1/2O3 were confirmed by ab initio calculations in which the system has the lower formation energy, stable lattice structure, and strong bonding state as Mn4+ enters into Ti site. The luminescent properties of Mn4+-doped samples were investigated; the samples emit far-red light centered at 708 nm with ultraviolet light (345 nm) or blue light (487 nm) excitation. According to the photoluminescence (PL) and excitation (PLE) spectra, the crystal field strength of the Mn4+-occupied environment was estimated. The thermal stability of phosphor was also evaluated through temperature-dependent PL intensity in a heating and cooling cycle process. The emission band is well-matched with the absorption band of phytochrome PFR under the excitation of light in near-ultraviolet to blue, which suggests that the LMT: Mn4+ phosphor has great potential applications in light-emitting diodes (LEDs) for modulating plant growth.
KW - far-red emission
KW - LEDs
KW - phosphor
KW - phytochrome
KW - plant growth
UR - http://www.scopus.com/inward/record.url?scp=85013486035&partnerID=8YFLogxK
U2 - 10.1021/acsami.6b15866
DO - 10.1021/acsami.6b15866
M3 - Article
VL - 9
SP - 6177
EP - 6185
JO - ACS Applied Materials and Interfaces
T2 - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
SN - 1944-8244
IS - 7
ER -