紫外线激发的单元白Lu2WO6,具有PC-WLED的宽带发射
Huibin Zheng1, Chunyu Zheng2, Xin Lian2
1Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, CN, China.
Dalton transactions (Cambridge, England : 2003)
|May 26, 2023
概括
研究人员开发了一种单一成分的酸酸,用于无兴奋剂的白光发射. 这种新型材料为生产白色发光二极管 (WLED) 提供了方便的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 由于复杂的能量转移机制,从单元光器获得白光是具有挑战性的.
- 通常需要使用兴奋剂元素来实现白光生成的宽频发射.
研究的目的:
- 开发一种能够发出白光而没有任何兴奋剂元素的单元.
- 为了研究 tungstate 阶段的结构和光发光特性.
- 为了证明合成在白色发光二极管 (WLED) 中的应用.
主要方法:
- tungstate (Lu2W3O12) 的水热合成与受控的pH值.
- 合成材料的相位识别和结构分析.
- 光发光谱学用于表征激发和发射特性.
- 第一个原则计算,以了解发光的起源.
- 用转换的白色发光二极管 (pc-WLED) 的制造.
主要成果:
- 在水热合成过程中调整pH值,产生了不同类型的硫酸相:正方体Lu2W3O12,单临床Lu6WO12和圆柱体Lu6WO12.
- 只有单临床的Lu2WO6阶段表现出发光,这归因于其较高的刺激子结合能量.
- 观察到480nm的内在发射和一个新的宽带发射,以340nm (激发) 和520nm (发射) 为中心,来自氧气空缺.
- 使用Lu2WO6的制造PC-WLED显示了白光区域内的CIE坐标.
结论:
- 能够发射白光的单元硫酸 (Lu2WO6) ,在没有使用兴奋剂的情况下成功合成.
- 白光发射源于内在发光和与缺陷相关的发光的组合.
- 这项研究提出了一种简单而有前途的方法,用于开发用于WLED应用的新型单元.
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