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High recorded color rendering index in single Ce,(Pr,Mn):YAG transparent ceramics for high-power white LEDs/LDs
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020/02/12 , DOI: 10.1039/d0tc00032a Yuelong Ma 1, 2, 3, 4, 5 , Le Zhang 1, 2, 3, 4, 5 , Tianyuan Zhou 1, 2, 3, 4, 5 , Bingheng Sun 1, 2, 3, 4, 5 , Yun Wang 5, 6, 7 , Jian Kang 1, 2, 3, 4, 5 , Pan Gao 5, 8, 9, 10 , Jin Huang 1, 2, 3, 4, 5 , Farida A. Selim 11, 12, 13, 14 , Chingping Wong 14, 15, 16, 17 , Ming Li 18, 19, 20, 21, 22 , Hao Chen 1, 2, 3, 4, 5
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020/02/12 , DOI: 10.1039/d0tc00032a Yuelong Ma 1, 2, 3, 4, 5 , Le Zhang 1, 2, 3, 4, 5 , Tianyuan Zhou 1, 2, 3, 4, 5 , Bingheng Sun 1, 2, 3, 4, 5 , Yun Wang 5, 6, 7 , Jian Kang 1, 2, 3, 4, 5 , Pan Gao 5, 8, 9, 10 , Jin Huang 1, 2, 3, 4, 5 , Farida A. Selim 11, 12, 13, 14 , Chingping Wong 14, 15, 16, 17 , Ming Li 18, 19, 20, 21, 22 , Hao Chen 1, 2, 3, 4, 5
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Transparent ceramics (TCs) are incredibly promising color converters for high-power white LEDs/LDs. However, the preparation process of multiple structured TCs with a high color rendering index (CRI) is a complicated technical challenge, and the inability of single-structured TCs to achieve a high CRI significantly limits their real applications. In this study, high quality single-structured Ce,(Pr,Mn):YAG TCs with “wide peak” and “narrow peak” red light emissions were designed and fabricated via a solid-state reaction and a vacuum sintering method. Compared with the emission spectra of Ce:YAG TC, the synchronous doping of Pr3+ and Mn2+ ions into Ce:YAG TC resulted in inhomogeneous broadening of the full width at half maximum (FWHM) from 91.7 nm to 102.2 nm. Impressively, the CRI of a single Ce,(Pr,Mn):YAG TC-based high-power white LED was as high as 84.8, and the correlated-color temperatures (CCTs) of the white LEDs/LDs were 5450 K and 3550 K, respectively. Furthermore, when the addition amounts of Pr3+ and Mn2+ were 0.2 at% and 0.8 at%, respectively, the as-prepared Ce,(Pr,Mn):YAG TC displayed a high quantum efficiency (IQE = 48.14%) and excellent color stability (only 5% fluctuation). Therefore, this study not only demonstrates how to overcome the spectrum deficiencies of single-structured TCs that restrain intrinsic CRI improvement, but also provides a reference for the pursuit of high luminescence properties. This work significantly reinforces the understanding of the CRI problems of TC-based high-power lighting, which is crucial for the real application of white LEDs/LDs.
中文翻译：
用于大功率白光LED / LD的单Ce，（Pr，Mn）：YAG透明陶瓷中记录的显色指数高
透明陶瓷（TC）是用于大功率白光LED / LD的令人难以置信的彩色转换器。然而，具有高显色指数（CRI）的多个结构化TC的制备过程是一项复杂的技术挑战，并且单结构TC无法获得高CRI的能力大大限制了其实际应用。在这项研究中，通过固态反应和真空烧结方法设计和制造了具有“宽峰”和“窄峰”红光发射的高质量单结构Ce，（Pr，Mn）：YAG TC 。与Ce：YAG TC的发射光谱相比，Pr 3+和Mn 2+的同步掺杂离子进入Ce：YAG TC导致半峰全宽（FWHM）从91.7 nm扩展到102.2 nm。令人印象深刻的是，单个基于Ce，（Pr，Mn）：YAG TC的大功率白色LED的CRI高达84.8，白色LED / LD的相关色温（CCT）为5450 K和3550分别为K。此外，当Pr 3+和Mn 2+的添加量时所制备的Ce，（Pr，Mn）：YAG TC分别为0.2 at％和0.8 at％，显示出高量子效率（IQE = 48.14％）和出色的色彩稳定性（仅5％波动）。因此，本研究不仅展示了如何克服抑制固有CRI改善的单结构TC的光谱缺陷，而且为追求高发光性能提供了参考。这项工作极大地增强了对基于TC的大功率照明的CRI问题的理解，这对于白色LED / LD的实际应用至关重要。
更新日期：2020-04-03
中文翻译：
用于大功率白光LED / LD的单Ce，（Pr，Mn）：YAG透明陶瓷中记录的显色指数高
透明陶瓷（TC）是用于大功率白光LED / LD的令人难以置信的彩色转换器。然而，具有高显色指数（CRI）的多个结构化TC的制备过程是一项复杂的技术挑战，并且单结构TC无法获得高CRI的能力大大限制了其实际应用。在这项研究中，通过固态反应和真空烧结方法设计和制造了具有“宽峰”和“窄峰”红光发射的高质量单结构Ce，（Pr，Mn）：YAG TC 。与Ce：YAG TC的发射光谱相比，Pr 3+和Mn 2+的同步掺杂离子进入Ce：YAG TC导致半峰全宽（FWHM）从91.7 nm扩展到102.2 nm。令人印象深刻的是，单个基于Ce，（Pr，Mn）：YAG TC的大功率白色LED的CRI高达84.8，白色LED / LD的相关色温（CCT）为5450 K和3550分别为K。此外，当Pr 3+和Mn 2+的添加量时所制备的Ce，（Pr，Mn）：YAG TC分别为0.2 at％和0.8 at％，显示出高量子效率（IQE = 48.14％）和出色的色彩稳定性（仅5％波动）。因此，本研究不仅展示了如何克服抑制固有CRI改善的单结构TC的光谱缺陷，而且为追求高发光性能提供了参考。这项工作极大地增强了对基于TC的大功率照明的CRI问题的理解，这对于白色LED / LD的实际应用至关重要。
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