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Enhanced Luminescence of Long-Wavelength Broadband Near-Infrared Germanate Phosphors.

ABSTRACT: Long-wavelength broadband near-infrared (NIR) phosphors have attracted considerable interest in the fields of medical cosmetology and organic detection because of their special emission band. Herein, Ca₂GeO₄(CGO): Cr⁴⁺ NIR phosphor, presenting a broadband emission with longer wavelength ranging from 1100 to 1600 nm, has been synthesized. Further, the luminescence intensity and quantum efficiency of Cr⁴⁺ could be obviously improved via the energy transfer from Eu³⁺ to Cr⁴⁺. The energy transfer is dominated by the dipole-dipole mechanism, which can be inferred from the spectra and the decay curves. Furthermore, in order to evaluate the potential application, an NIR phosphor-converted light-emitting diode (pc-LED) based on blue chip has been prepared. Consequently, CGO: Eu³⁺, Cr⁴⁺ exhibits proper output power and wider half-width than the NIR LED chip, indicating its great prospect for long-wavelength NIR pc-LED applications.

SUBMITTER: He S

PROVIDER: S-EPMC10157857 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature

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Enhanced Luminescence of Long-Wavelength Broadband Near-Infrared Germanate Phosphors.

He Shuya S Liu Yuanhong Y Gao Tongyu T Liu Ronghui R Chen Guantong G Duan Mobin M Cao Min M

ACS omega 20230418 17

Long-wavelength broadband near-infrared (NIR) phosphors have attracted considerable interest in the fields of medical cosmetology and organic detection because of their special emission band. Herein, Ca2GeO4(CGO): Cr4+ NIR phosphor, presenting a broadband emission with longer wavelength ranging from 1100 to 1600 nm, has been synthesized. Further, the luminescence intensity and quantum efficiency of Cr4+ could be obviously improved via the energy transf ...[more]

PMID: 37151565

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