The current research illustrates excitation energy-triggered photoluminescent characteristics of Pr³⁺ions in SrCeO₃ providing a practical approach for developing high CRI wLED and its applications. SrCeO₃: xPr³⁺ (x = 0, 0.005, 0.01, 0.02, 0.03 wt) perovskites synthesized by fuel excess gel combustion method generate high CRI (~98) for wLED applications. Crystalline phosphors with orthorhombic structures having space group Pnma were confirmed by XRD. The unit cell volume expansion occurred with an increase in Pr³⁺ concentration was verified through the Rietveld refinement technique. Surface morphology, particle distribution, and size were observed via FE-SEM imaging, and detected a well-defined regular distorted spherical structure with average grain size 0.826 μm for Pr³⁺ doped SrCeO₃. Elemental mapping and EDS analysis identified the uniform distribution and elemental purity of SrCeO₃: 0.01 Pr³⁺. Further, the molecular vibrations and modes were analyzed from the Raman spectrum. Moreover, the average particle size assessed via TEM analysis was found to be ~83.2 nm, consistent with XRD analysis. UV–visible absorption spectra for optical energy-band gap analysis showed a decrease in band gap energy with an increase in Pr³⁺ concentration, realizing an effective energy transfer from Ce⁴⁺ to Pr³⁺. PL measurements showed a huge variety of emission transitions, corresponding to excitations 290 nm, 321 nm, 373 nm, and 449 nm. The critical dopant concentration instigated by concentration quenching was 1 wt% Pr³⁺, ascribed to dipole–dipole interaction. The fluorescence lifetime of the optimal sample was 4.835 μs. Commission International de I’Eclairage (CIE) diagram exposes the white light emanation of SrCeO₃: Pr³⁺. Among which white light with high CRI (~98) and comparably low CCT (~6311 K) was obtained for SrCeO₃: 0.01 Pr³⁺ at 373 nm excitation. The obtained results recommend that SrCeO₃: Pr³⁺ perovskite as an efficient white phosphor for fabricating high-performance wLEDs.

目前的研究阐明了SrCeO ₃中Pr ³⁺离子的激发能触发光致发光特性，为开发高显色性wLED及其应用提供了实用方法。通过燃料过量凝胶燃烧法合成的SrCeO ₃ : xPr ³⁺ (x = 0, 0.005, 0.01, 0.02, 0.03 wt)钙钛矿可为WLED应用产生高CRI (~98)。通过XRD确认了具有空间群Pnma的具有斜方结构的晶体磷光体。通过Rietveld 精修技术验证了随着Pr ³⁺浓度增加而发生的晶胞体积膨胀。通过FE-SEM成像观察表面形貌、颗粒分布和尺寸，发现Pr ³⁺掺杂的SrCeO ₃具有清晰的规则扭曲球形结构，平均晶粒尺寸为0.826 μm。元素分布和EDS分析确定了SrCeO ₃ : 0.01 Pr ³⁺的均匀分布和元素纯度。此外，从拉曼光谱中分析了分子振动和模式。此外，通过 TEM 分析评估的平均粒径约为 83.2 nm，与 XRD 分析一致。光学能带隙分析的紫外-可见吸收光谱显示，带隙能量随着Pr ³⁺浓度的增加而降低，实现了从Ce ⁴⁺到Pr ³⁺的有效能量转移。 PL 测量显示出各种各样的发射跃迁，对应于 290 nm、321 nm、373 nm 和 449 nm 的激发。 浓度猝灭引发的临界掺杂剂浓度为 1 wt% Pr ³⁺ ，归因于偶极-偶极相互作用。最佳样品的荧光寿命为4.835 μs。国际照明委员会 (CIE) 图表显示了 SrCeO ₃ : Pr ³⁺的白光发射。其中SrCeO ₃ : 0.01 Pr ³⁺在373 nm激发下获得具有高CRI (~98)和相对低CCT (~6311 K)的白光。所得结果表明SrCeO ₃ : Pr ³⁺钙钛矿作为制造高性能wLED的有效白色荧光粉。