A series of β-SiAlON:Eu²⁺ phosphors were synthesized from single-source precursors, perhydropolysilazane chemically modified with Al(OCH(CH₃)₂)₃, AlCl₃, and EuCl₂. The single-source precursors were converted to β-SiAlON:Eu²⁺ phosphors by pyrolysis under flowing N₂ or NH₃ at 1000°C, followed by heat treatment at 1800°C under an N₂ gas pressure at 980 kPa. By varying the molar ratio of the chemical modifiers, β-SiAlON:Eu²⁺ with the compositions close to the theoretical ones expressed as Si_6−zAl_zO_z−2yN_8−z+2y:yEu²⁺ were synthesized, where the z values and Eu²⁺ contents were controlled in the ranges of .44–.78 and .35–1.48 mol%, respectively. The polymer-derived β-SiAlON:Eu²⁺ phosphors exhibited green emission under excitation at 460 nm attributed to the 4f⁷–4f⁶(7f³)5d¹ transition of dopant Eu²⁺. High-angle annular dark-field-scanning transmission microscopy analysis confirmed that the doped-Eu²⁺ existed interstitially within the channels along the c axis of host β-SiAlON. Compared with the conventional powder metallurgy route, the polymer-derived ceramic route in this study offers some advantages in the grain growth of host β-SiAlON and photoluminescence properties in terms of green emission intensity under excitation at 460 nm, and the highest intensity was achieved for the polymer-derived β-SiAlON:Eu²⁺ with z = .64 and .37 mol% Eu²⁺.

中文翻译：

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聚合物衍生的 β-SiAlON:Eu2+ 荧光粉

一系列β-SiAlON:Eu ^{2+荧光粉由}单源前体、用Al(OCH(CH ₃ ) ₂ ) ₃、AlCl ₃和EuCl ₂化学改性的全氢聚硅氮烷合成。通过在 1000°C 的流动 N ₂或 NH ₃下热解，然后在 980 kPa 的 N ₂气压下在 1800°C 下进行热处理，将单源前体转化为 β-SiAlON:Eu ²⁺磷光体。通过改变化学改性剂的摩尔比，β-SiAlON:Eu ²⁺的组成接近理论组成，表示为 Si _6−z Al _z O _{z −2 y} N _{8− z +2 y} : y Eu ²⁺被合成，其中z值和 Eu ²⁺含量控制在 .44–.78 和 .35–1.48 mol% 的范围内， 分别。聚合物衍生的 β-SiAlON:Eu ²⁺荧光粉在 460 nm 激发下表现出绿色发射，这归因于掺杂剂 Eu ^{2+的 4f 7} –4f ⁶ (7f ³ )5d ¹跃迁。高角度环形暗场扫描透射显微镜分析证实掺杂的 Eu ²⁺沿宿主 β-SiAlON 的c轴间隙存在于通道内。与传统的粉末冶金路线相比，本研究中的聚合物衍生陶瓷路线在 460 nm 激发下的绿色发射强度方面，在主体 β-SiAlON 的晶粒生长和光致发光性能方面具有一些优势，并且达到了最高强度对于聚合物衍生的 β-SiAlON:Eu ²⁺，其中z  = .64 和 .37 mol% Eu ²⁺。