用于白光发光二极管-荧光粉应用的 CaO:Tb3+ 绿色发光荧光粉:提高光输出强度

Ha Thanh Tung, Dieu An Nguyen Thi
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摘要

使用淡绿色发光的 CaO:Tb3+ 可提高发光二极管(LED)发出的白光的发光输出和色度保真度。CaO:Tb3+ 与 YAG:Ce3+ 黄色发光荧光粉相结合,为白光的产生提供了足够的彩色光谱比例,从而提高了色彩性能。这种荧光粉组合适用于三种最常用的 LED 结构:共形、杯内和远程荧光粉结构。通过调整 CaO:Tb3+ 的比例来监测这三种 LED 的光学特性变化。绿色荧光粉的比例越高,所有结构的散射效率就越高,色彩协调性就越好,光通量就越大。当 CaO:Tb3+ 的浓度超过一定水平时,色质比例会有所降低。因此,应根据白光发光二极管(WLED)的荧光粉配置,调整 CaO:Tb3+ 的浓度,以获得良好的色彩表现,改善色彩一致性和发光性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
CaO:Tb3+ green-emitting phosphor for white light-emitted diode-phosphor applications: the improvement of light output intensity
The use of CaO:Tb3+ with light green emission on for improvement of both luminescent output and chromatic fidelity of the white light emitted from a light-emitting diode (LED). The CaO:Tb3+ is combined with the yellow-emitting phosphor of YAG:Ce3+ to provide sufficient colored spectral proportion for the white light generation, enhancing the color performance. The phosphor combination is utilized for the three most applied LED structures: conformal, in-cup, and remote phosphor structures. The changes in optical properties of these three LEDs are monitored with adjustments in the proportion of CaO:Tb3+. The higher proportion of the green phosphor results in higher scattering efficiency in all structures, offering better color coordination and stronger luminous flux. The color quality scale is somehow reduced when CaO:Tb3+ concentration is more than a certain level. Therefore, depending on the phosphor configuration of the white light-emitting diode (WLED), the concentration of CaO:Tb3+ should be modified to achieve a good color rendition with improved color consistency and luminous properties.
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