The discovery of ultra-broadband VIS-NIR emission phosphors is a major challenge for miniature/portable devices in special applications like bio-sensing. In different solid materials, the Eu²⁺ broadband emission usually covers the blue to red spectral region. The near infrared spectral range is extremely difficult to obtain with the activator Eu²⁺, even in nitride host materials. In this work, we design and report a record-breaking oxide-based phosphor, Ba₃ScB₃O₉:Eu²⁺, which yields VIS-NIR light (510 -1100 nm) in response to ultraviolet-blue light excitation. Under a preferred excitation at 376 nm, Ba₃ScB₃O₉:Eu²⁺ shows a broadband long-wavelength emission with the main peak, full width at half maximum and Stokes shift of 735 nm, 205 nm and 12991 cm^-1, respectively. The spectral position and band width can be rationalized by combining the nephelauxetic effect and crystal field. By covering the title phosphor on a blue LED chip (450 nm), a VIS-NIR pc-LED containing Eu²⁺ emission with NIR out power of 2.3 [email protected] mA and photoelectric efficiency of 9.3%@100 mA is obtained. According to ultra-broadband emission in visible-near infrared region, application in LEDs for real-time non-destructive examination occurs promising.

对于在生物传感等特殊应用中的微型/便携式设备而言，发现超宽带VIS-NIR发射磷光体是一项重大挑战。在不同的固体材料中，Eu ²⁺宽带发射通常覆盖蓝色到红色光谱区域。即使在氮化物基质材料中，使用活化剂Eu ^2+都很难获得近红外光谱范围。在这项工作中，我们设计并报告了打破纪录的基于氧化物的磷光体Ba ₃ ScB ₃ O ₉：Eu ²⁺，它响应紫外-蓝光激发而产生VIS-NIR光（510 -1100 nm）。在376 nm的最佳激发下，Ba ₃ ScB ₃ O ₉：Eu ²⁺显示宽带长波发射，其主峰，半峰全宽和斯托克斯位移分别为735 nm，205 nm和12991 cm ^-1。光谱位置和带宽可以通过结合浊度和晶体场来合理化。通过将标题磷光体覆盖在蓝色LED芯片（450 nm）上，可以获得VIS-NIR pc-LED，其中包含Eu ²⁺发射，且NIR输出功率为2.3 [受电子邮件保护] mA，光电效率为9.3%@100 mA。根据可见光-近红外区的超宽带发射，在LED中进行实时无损检测的应用前景广阔。