Two-site Cr(3+)occupation in the MgTa2O6:Cr(3+)phosphor toward broad-band near-infrared emission for vessel visualization : научное издание | Научно-инновационный портал СФУ

Two-site Cr(3+)occupation in the MgTa2O6:Cr(3+)phosphor toward broad-band near-infrared emission for vessel visualization : научное издание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1039/d0tc01951h

Аннотация: Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) have great potential in photonic, optoelectronic and biological applications, while the discovery of a broad-band NIR phosphor still remains a challenge. Here, we report a novel Cr3+-activated MgTa(2)O(6)phosphor with an asymmetrical emission band ranging from 700 to 1150 nm and a large full width at half maximum (FWHM) of 140 nm upon 460 nm blue light excitation. The broad spectrum is assigned to the overlap of two bands centered at 910 and 834 nm, which originate from the spin-allowed transition of(4)T(2)->(4)A(2)for different Cr(3+)ions located in the two six-coordinated crystallographic sites of Mg(2+)and Ta5+, respectively. The distribution of blood vessels and bones in human palm and wrist is observed with the assistance of a commercial NIR camera and a fabricated pc-LED, which demonstrates that the MgTa2O6:Cr(3+)phosphor is promising in biological applications.

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Издание

Журнал: JOURNAL OF MATERIALS CHEMISTRY C

Выпуск журнала: Vol. 8, Is. 27

Номера страниц: 9322-9328

ISSN журнала: 20507526

Место издания: CAMBRIDGE

Издатель: ROYAL SOC CHEMISTRY

Авторы

  • Liu Gaochao (South China Univ Technol, Sch Mat Sci & Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510640, Peoples R China)
  • Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Lab Crystal Phys, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia)
  • Lei Bingfu (South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Peoples R China)
  • Xia Zhiguo (South China Univ Technol, Sch Mat Sci & Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510640, Peoples R China)

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