Red-emission over a wide range of wavelengths at various temperatures from tetragonal BaCN₂:Eu²⁺

• Masubuchi, Yuji

• Nishitani, Sayaka

• Hosono, Akira

• Kitagawa, Yuuki

• Ueda, Jumpei

• Tanabe, Setsuhisa

• Yamane, Hisanori

• Higuchi, Mikio

• Kikkawa, Shinichi

書誌事項

タイトル別名

• Red-emission over a wide range of wavelengths at various temperatures from tetragonal BaCN2:Eu2+
• Red-emission over a wide range of wavelength at various temperatures from tetragonal BaCN2:Eu2+

抄録

A new polymorph of BaCN2 was obtained via a simple nitridation reaction of BaCO3 under an NH3 flow at 900 1C. The product was analyzed via single crystal X-ray diffraction and infrared spectroscopy, and it was found to have a tetragonal I4/mcm crystal structure (space group no. 140) with a = 0.60249(4) nm and c = 0.71924(5) nm. In this structure, each Ba2+ cation is situated in the square antiprism of N atoms of NCN(2-)anionic groups. Eu2+ doped BaCN2 can be excited by irradiation of blue and green light (from 400 to 550 nm), and it generates an intense red emission peak at 660 nm with a quantum efficiency of 42% in response to 465 nm excitation at room temperature. The peak emission wavelength varies over an extremely wide range of temperature, from 640 nm at 500 K to 680 nm at 80 K, and this red-shift with decreasing temperature is attributed to a unit cell shrinkage that results in significant crystal field splitting of the 5d energy levels of the Eu2+ ions.

収録刊行物

• Journal of materials chemistry C

  Journal of materials chemistry C 6 (24), 6370-6377, 2018-06-28

  Royal Society of Chemistry

キーワード

• Materials Chemistry
• General Chemistry

詳細情報

• CRID: 1050001202676325760
• NII論文ID: 120006648347
• DOI: 10.1039/c8tc01289j
• ISSN: 20507534
• ISSN: 20507526
• HANDLE: 2115/74809
• Web Site: http://pubs.rsc.org/en/content/articlepdf/2018/TC/C8TC01289J
• 本文言語コード: en
• 資料種別: journal article
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