CN111205191B - 一种基于铜(i)-溴杂化荧光材料制备的白光led荧光粉 - Google Patents
一种基于铜(i)-溴杂化荧光材料制备的白光led荧光粉 Download PDFInfo
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Abstract
本发明提供一种基于铜(I)‑溴杂化荧光材料制备的白光LED荧光粉,属荧光粉领域。本发明白光LED荧光粉的制备方法为将橙红色铜‑溴杂化荧光粉化学式为[N(C3H7)4]2[Cu4Br6],与商业化的(Ba,Sr)2SiO4:Eu2+绿色荧光粉及BAM:Eu2+(BP)蓝色荧光粉混合后进行调控得到白色荧光粉而用于白光LED的制备。本发明所涉及的白光LED荧光粉具有制备方法简单,成本低,相关色温可达4263K,显色指数可达94.9的优点,可运用于实际照明领域。
Description
技术领域
本发明属荧光粉领域,具体涉及一种基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉。
背景技术
发光二极管(LED)是一种能将电能转化为光能的照明器件,相比于传统的白炽灯,其具有效率高及寿命长的优点因而被视为第四代照明技术。白光发光二极管(WLED)被广泛用于照明领域。目前白光LED制备方法可以分为三种,第一种通过将红、绿、蓝三色LED组合制备白光器件;第二种为通过多个活性层直接发射白光;第三种为荧光粉涂抹芯片方法即将荧光粉涂抹在芯片上,芯片激发荧光粉发射荧光,荧光粉及芯片发射光组合为白光,这也是目前应用最广的方法;其中荧光粉涂抹芯片方法又可以分为以下几种:黄色荧光粉涂抹到蓝色LED芯片方法;单一组分白色荧光粉涂抹到芯片方法;多组分白色荧光粉涂抹到芯片方法。相比于后两种方法,黄色荧光粉涂抹方法的显色指数低(CRI),相关色温(CCT)高也即其发射的光偏冷因而不适用于室内照明。多组分白色荧光粉相对比于单一组分荧光粉,具有荧光可以调节及发光效率更高的优点因而更适用于白光LED的制备。
目前市场上商业化的荧光粉主要为基于铕、铽和钇等稀土金属参杂的无机材料。这类荧光粉由于稀土金属在自然界资源少因而价格贵,此外它们的制备通常需要高温加热因而耗能大且操作复杂。因而有必要发展一种低能耗、成本低、制备方法简便的荧光粉制备方法。近几年有许多研究者致力于制备非稀土元素荧光粉的制备,目前已经有基于ZnS,CdSe,纳米晶及量子点的荧光粉被报道,然而低荧光量子产率及复杂的制备方法限制了其在实际照明技术领域中的应用。无机-有机杂化材料既具有无机组分延展性好及有机组分结构多样性等的优点,又可能具有两种独立组分所不具有的一些优点。其中,铜-卤素杂化材料具有资源丰富、合成方法简便、结构多样性及荧光可调节性的优点,因而有望作为荧光粉用于白光LED的制备。目前已报道的铜-卤素杂荧光粉主要为一些含氮、硫有机芳香族化合物配体与中性铜-卤素簇通过铜与氮或硫配位作用形成的无机-有机杂化材料。这些铜-卤素簇杂化材料虽然具有较高的荧光量子产率但其荧光稳定性差的特点限制了其在LED领域中的应用。因而实现铜-溴杂化荧光粉在白光LED中制备领域中的应用具有重要意义。
发明内容
针对以上存在的问题,我们基于铜(I)-溴杂化荧光材料制备了一种白光LED荧光粉,通过将橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、蓝色荧光粉BAM:Eu2+(BP)混合研磨后用于白光LED灯的制备;基于橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]、(Ba,Sr)2SiO4:Eu2+绿色荧光粉及BAM:Eu2+(BP)蓝色荧光粉的白光LED灯的相关色温可达到4263K,显色指数可达到94.9,因而有望运用于实际照明领域。
本发明一种基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉,将橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、蓝色荧光粉BAM:Eu2+(BP)按比例混合研磨,得到白光LED荧光粉,可用于白光LED器件的制备。
所述三元荧光粉中橙红色铜-溴杂化荧光粉,绿色荧光粉,蓝色荧光粉三者质量比为为0.1~1:0.1~2:1~18,优选1:1:18。
所述橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]在365nm激发下荧光最大发射峰在660nm左右。
所述的白光LED荧光粉与LED灌封胶混合均匀后涂抹到未封装的LED芯片上,烘干处理即得到白光LED器件。
所述白光LED荧光粉与LED灌封胶质量比为0.01~40:1。
本发明具有如下优点:基于铜(I)-溴杂化荧光材料制备的一种白光LED荧光粉具有成本低,荧光可调节的优点;基于白光LED荧光粉所制备白光LED相关色温可达4263K,显色指数可达94.9,可用于实际室内照明。
附图说明
图1实施案例1制备得到白光LED图。
图2实施案例1制备得到白光LED光源光谱测试结果。
图3实施案例2制备得到白光LED光源光谱测试结果。
图4实施案例3制备得到白光LED光源光谱测试结果。
图5实施案例4制备得到白光LED光源光谱测试结果。
图6实施案例5制备得到白光LED光源光谱测试结果。
图7实施案例6制备得到白光LED光源光谱测试结果。
具体实施方法
以下通过实施例对本发明的上述内容做进一步详细说明,但不应将此理解为本发明仅局限于以下实施例,凡是基于本发明内容实现的技术,都应视为本发明的范围。
一种基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉,是通过将橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]商业化与(Ba,Sr)2SiO4:Eu2+绿色荧光粉及BAM:Eu2+(BP)蓝色荧光粉混合后调控得到多组分白色荧光粉,可用于白光LED的制备。
实施例1
取0.1g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.1g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、1.8g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取1g该白光三元荧光粉与2g ZH-903有机硅电子灌封胶混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在60℃下烘干,即得到白光LED器件(图1)。
如图2所示,制备得到的白光LED在驱动电流为20mA,电压为3V时得到的相关色温Tc=4035K,显色指数:Ra=94.1,色品坐标:x=0.3764y=0.3664/u'=0.2266v'=0.3309duv=-3.726e-003,光通量Φ=0.4296lm。LED恒温=10.0度,测试温度25度。
实施例2
取0.2g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.2g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、3.6g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取1g该白光三元荧光粉与4g硅树脂(德国WEICON硅树脂Silicon A粘合密封剂)混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在60℃下烘干,即得到白光LED器件。
如图3所示,制备得到的白光LED在驱动电流为60mA,电压为2V时得到的相关色温:Tc=4065K,显色指数:Ra=94.1,色品坐标:x=0.3753,y=0.3662/u'=0.2259,v'=0.3307,duv=-3.482e-003,光通量Φ=1.535lm。LED恒温=10.0度,测试温度25度。
实施例3
取0.3g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.3g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、5.4g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取0.5g该白光三元荧光粉与2g卡夫特K-9761双组份环氧树脂灌封胶混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在50℃下烘干,即得到白光LED器件。
如图4所示,制备得到的白光LED在驱动电流为120mA,电压为3V时得到的相关色温:相关色温:Tc=4149K,显色指数:Ra=94.2,色品坐标:x=0.3724,y=0.3655/u'=0.2243,v'=0.3302,duv=-2.916e-003,光通量Φ=3.108lm。LED恒温=10.0度,测试温度25度。
实施例4
取0.15g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.15g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、2.7g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取1g该白光三元荧光粉与2g友成透明环氧LED电子灌封胶混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在60℃下烘干,即得到白光LED器件。
如图5所示,制备得到的白光LED在驱动电流为180mA,电压为3V时得到的相关色温:相关色温:相关色温:Tc=4208K,显色指数:Ra=94.4,色品坐标:x=0.3705,y=0.3658/u'=0.2229,v'=0.3301,duv=-2.190e-003,光通量Φ=4.576lm。LED恒温=10.0度,测试温度25度。
实施例5
取0.15g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.15g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、2.7g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取1g该白光三元荧光粉与2g天佐9142加成型有机硅灌封胶混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在60℃下烘干,即得到白光LED器件。
如图6所示,制备得到的白光LED在驱动电流为240mA,电压为2.5V时得到的相关色温:相关色温:相关色温:Tc=4245K,显色指数:Ra=94.7,色品坐标:x=0.3694,y=0.3663/u'=0.2220,v'=0.3302,duv=-1.593e-003。光通量Φ=5.951lm,LED恒温=10.0度,测试温度25度。
实施例6
取0.2g橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与0.2g商业化的绿色荧光粉(Ba,Sr)2SiO4:Eu2+、3.6g蓝色荧光粉BAM:Eu2+(BP)进行混合研磨得到的白光三元荧光粉。
取1g该白光三元荧光粉与4g硅树脂(德国WEICON硅树脂Silicon A粘合密封剂)混合均匀后涂抹到未封装的LED紫外芯片上(365nm,1W,350mA),在60℃下烘干,即得到白光LED器件。
如图7所示,制备得到的白光LED在驱动电流为360mA,电压为3.5V时得到的相关色温:Tc=4263K,显色指数:Ra=94.9,色品坐标:x=0.3688y=0.3666/u'=0.2215v'=0.3302duv=-1.278e-003,光通量Φ=7.269lm。LED恒温=10.0度,测试温度25度。
Claims (3)
1.一种基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉,其特征在于:该白光LED荧光粉按照以下方法制备而得,将橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]与绿色荧光粉(Ba,Sr)2SiO4:Eu2+、蓝色荧光粉BAM:Eu2+(BP)按比例混合研磨得到的白光荧光粉;所制备的白光LED荧光粉可用于白光LED器件的制备;
所述橙红色铜-溴杂化荧光粉[N(C3H7)4]2[Cu4Br6]在365nm激发下荧光最大发射峰在660nm左右;
所述三元白光LED荧光粉中橙红色铜-溴杂化荧光粉,绿色荧光粉,蓝色荧光粉三者质量比为0.1~1:0.1~2:1~18。
2.根据权利要求1所述的基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉的应用,其特征在于该白光LED荧光粉用于白光LED器件的制备,具体为将制备的白光LED荧光粉与LED灌封胶混合均匀后涂抹到未封装的LED芯片上,烘干处理即得到白光LED器件。
3.根据权利要求2所述的基于铜(I)-溴杂化荧光材料制备的白光LED荧光粉的应用,其特征在于:所述三元荧光粉与LED灌封胶的质量比为0.01~40:1。
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