Hakeem D A, Park K
J Nanosci Nanotechnol. 2016 Feb;16(2):1724-7. doi: 10.1166/jnn.2016.11999.
CaSr(1-x)Al2SiO7:xEu3+ (0.01 < or = x < or = 0.12) red phosphors are prepared by the solid-state reaction method. The photoluminescence properties of the CaSr(1-x)Al2SiO7:xEu+ phosphors are studied as a function of Eu3+ content. The CaSr(1-x)Al2SiO7:xEu3+ phosphors form an orthorhombic structure with a space group of P2(1)2(1)2(1). The phosphors are effectively excited by 393 nm light. The emission spectra consist of several peaks at 575, 585, 616, 654, and 700 nm, which are attributed to the transitions from the excited 5Do to 7Fj (j = 0, 1, 2, 3, and 4) levels of Eu3+, respectively. The phosphors show intense red emission due to the 5Do --> (7)F2 transition of Eu3+. The strongest red emission is observed for the CaSr0.94Al2SiO7:0.06Eu3+ phosphor. This study proposes that the CaSr(1-x)Al2SiO7:xEu3+ red phosphors have a high potential for near ultraviolet-based white light-emitting diodes.
采用固相反应法制备了CaSr(1 - x)Al2SiO7:xEu3 +（0.01 ≤ x ≤ 0.12）红色荧光粉。研究了CaSr(1 - x)Al2SiO7:xEu +荧光粉的光致发光性能与Eu3 +含量的关系。CaSr(1 - x)Al2SiO7:xEu3 +荧光粉形成正交结构，空间群为P2(1)2(1)2(1)。该荧光粉能被393 nm光有效激发。发射光谱由575、585、616、654和700 nm处的几个峰组成，分别归因于Eu3 +从激发态5Do到7Fj（j = 0、1、2、3和4）能级的跃迁。由于Eu3 +的5Do→(7)F2跃迁，荧光粉呈现出强烈的红色发射。CaSr0.94Al2SiO7:0.06Eu3 +荧光粉的红色发射最强。本研究表明，CaSr(1 - x)Al2SiO7:xEu3 +红色荧光粉在基于近紫外的白光发光二极管方面具有很大的潜力。
