Light sources with the spectrum distribution approaching the sunlight, even in the visible range, are preferred. Up to now, sunlight simulator is still a great challenge to the scientists. In this work, the Sn²⁺/Mn²⁺ doped germanate glasses with the emission near to the sunlight spectral distribution in the visible wavelength region were developed, and the corresponding applications in w-LEDs were demonstrated. The spectral properties including excitation and emission characteristics, concentration quenching, fluorescence dynamics for Sn²⁺ and Mn²⁺ single-doped germanate glasses were studied. It is found that both Sn²⁺ and Mn²⁺ single-doped glasses can be effectively excited by broadband ultraviolet and subsequently generate broadband visible emissions. However, the emission from each of single-doped glasses does not cover full visible wavelength range. Fortunately, it is found that the lack of the red spectral component in the broadband visible emission of Sn²⁺ single-doped glass can be compensated by the broadband red emission of Mn²⁺. On that base, the Sn²⁺/Mn²⁺ co-doped germanate glasses were fabricated and studied. Broadband emission covering full visible range, good luminescence thermal stability and excellent chromatic performance were realized in the co-doped glasses by optimizing concentration and engineering energy transfer. Finally, a prototype w-LED was assembled by the Sn²⁺/Mn²⁺ co-doped germanate glass and a 310 nm LED chip. The prototype w-LED reveals the sunlight-like visible spectrum, good color coordinates (0.380, 0.371), low correlated color temperature (CCT) of 3811 K and high color rendering index of 95.3, indicating that the Sn²⁺/Mn²⁺ co-doped germanate glasses are promising candidate to develop high performance w-LED.

具有接近太阳光的光谱分布的光源，即使在可见光范围内，也是优选的。迄今为止，太阳光模拟器对科学家们来说仍然是一个巨大的挑战。本工作开发了在可见光波长范围内发射接近太阳光光谱分布的Sn ²⁺ /Mn ^{2+掺杂锗酸盐玻璃，并展示了其在w-LEDs中的相应应用。研究了Sn 2+}和Mn ²⁺单掺杂锗酸盐玻璃的激发发射特性、浓度猝灭、荧光动力学等光谱特性。结果表明，Sn ²⁺和 Mn ²⁺单掺杂玻璃可以被宽带紫外线有效激发，随后产生宽带可见光发射。然而，每个单掺杂玻璃的发射都没有覆盖整个可见波长范围。幸运的是，发现单掺杂Sn ^{2+玻璃的宽带可见光发射中红色光谱分量的缺失可以通过Mn 2+}的宽带红色发射来补偿。在此基础上，Sn ²⁺ /Mn ²⁺制造并研究了共掺杂锗酸盐玻璃。通过优化浓度和工程能量转移，共掺杂玻璃实现了覆盖全可见光范围的宽带发射、良好的发光热稳定性和优异的色性能。最后，由Sn ²⁺ /Mn ²⁺共掺杂锗酸盐玻璃和310 nm LED 芯片组装了w-LED 原型。原型 w-LED 显示出类似太阳光的可见光谱、良好的色坐标 (0.380, 0.371)、3811 K 的低相关色温 (CCT) 和 95.3 的高显色指数，表明 Sn 2+ ^/ Mn ²⁺共掺杂锗酸盐玻璃是开发高性能 w-LED 的有前途的候选者。