CN115505149A - 一种圆偏振发光材料及其制备方法 - Google Patents
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Abstract
本发明涉及一种圆偏振发光材料及其制备方法，所述方法包括以下步骤：步骤(1)在周期性材料或是无定型材料中制备发光材料；步骤(2)人为构建或提供发光材料所处的介电常数各向异性的环境；步骤(3)对发光材料进行圆偏振光谱测试，得到具有对映信号的圆偏振信号；步骤(4)采用诱导环境产生介电常数各向异性的方法，使发光材料形成可调控的圆偏振发光材料。本发明基于有序结构尺寸大小的双折射性诱导产生可调控的圆偏振发光材料，采用材料本征的各向异性的组装或是人为诱导的宏观异性等策略开发出的具有特定偏振态的圆偏振发光材料。本方法适用于有机发光材料和无机发光材料；也适用于荧光发射和磷光发射。
Description
技术领域
本发明涉及有机发光材料技术领域，具体涉及一种圆偏振发光材料及其制备方法。
背景技术
圆偏振发光材料在有机光电材料，天体物理领域和自旋电子学等领域具有广泛的应用。但是现在的圆偏振发光材料均是基于手性发光结构的修饰和拓展而开发的，目前制备条件高度复杂，制备成本极高且由于手性分子发光波长的限制导致适用性极窄。因此，目前的圆偏振发光材料的报道缺乏广谱性且发高效率降低，无法开发有效的应用。因此，开发一种具有普遍适用性的具有可调控的圆偏振发光材料显得十分有必要。
为了克服现圆偏振发光材料制备复杂且适用性差的情况，本发明通过诱导和开发环境各向异性的策略制备了一系列具有可控圆偏振发光性质的发光材料，能够实现在可见光波段实现强度可控的圆偏振发光材料，并适合大范围工业化制备。同时，本发明制备所得的圆偏振发光材料的发光波长和发光效率只依赖于发光分子的发光波长和发光效率，而发光分子的选择对象十分广泛，因此这对圆偏振发光材料的发展和应用具有重大意义。
发明内容
本发明提供一种圆偏振发光材料及其制备方法，所述圆偏振发光材料具有可控的圆偏振发光信号且发光效率高。
本申请提供一种圆偏振发光材料的制备方法，包括以下步骤：步骤(1)在周期性材料或是无定型材料中制备发光材料；
步骤(2)人为构建或提供发光材料所处的介电常数各向异性的环境；
步骤(3)对发光材料进行圆偏振光谱测试，得到具有对映信号的圆偏振信号；
步骤(4)采用诱导环境产生介电常数各向异性的方法，使发光材料形成可调控的圆偏振发光材料。
可选的，在本申请的一些实施例中，所述步骤(1)中，所述步骤(1)中，发光材料的波长范围包括从紫外光到可见光区到红外光，
可选的，在本申请的一些实施例中，所述步骤(1)中，周期性材料包括具有宏观周期性的晶体材料和微观周期性的有序组装材料；
可选的，在本申请的一些实施例中，无定型材料包括聚合物，玻璃态基质等无定型材料。
可选的，在本申请的一些实施例中，人为构建的各向异性环境包括结构形变，应力变化等带来的介电常数的各向异性的变化。
可选的，在本申请的一些实施例中，发光的机理包括但不限于荧光发射和磷光发射。
可选的，在本申请的一些实施例中，所述的可调控的圆偏振发光材料的圆偏振信号会根据环境的改变或是测试角度的改变而改变。
可选的，在本申请的一些实施例中，其圆偏振发光信号会随着测试的方向的改变而改变。
可选的，在本申请的一些实施例中，用于制备的发光材料包括但不限于有机发光材料和无机材料。
相应的，本申请还提供一种采用如上所述的制备方法所制备得到的圆偏振发光材料，所述圆偏振发光材料包括有机圆偏振发光材料和无机圆偏振发光材料；发光机理包括荧光发光和室温磷光发光；发光颜色包括红色、蓝色和绿色以及由三元色组合而成的颜色。
可选的，在本申请的一些实施例中，所述纯圆偏振发光材料具有圆偏振光谱信号可调控的性质。
可选的，在本申请的一些实施例中，所述发光材料种类不限，优选地，所述有机发光材料包括苯偶酰、罗丹明B、四苯乙烯和鲁米诺等有机发光分子的任意一种或多种混合，所述无机发光材料为硒化镉量子点等无机材料。
可选地，在本申请的一些实施例中，所述的介电常数的各向异性环境的构建方法不限，优选地，所述包括利用培养单晶的方式诱导分子结晶构建各向异性环境、利用薄膜掺杂再拉伸、加压等方式诱导产生各向异性环境以及诱导分子有序组装产生各向异性环境的策略等。
本申请采用诱导环境产生介电常数各向异性的方法，使发光材料形成可调控的圆偏振发光材料，所得到的圆偏振发光材料发光效率高，具有普遍适用性。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是实施例1提供的圆偏振发光光谱曲线；
图2是实施例2提供的圆偏振发光光谱曲线；
图3是实施例3提供的圆偏振发光光谱曲线；
图4是实施例4提供的圆偏振发光光谱曲线；
图5是实施例5提供的圆偏振发光光谱曲线。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
1)：在周期性材料或是无定型材料中制备发光材料；
2)：人为构建或提供发光材料所处的介电常数各向异性的环境；
实施例一、
本实施例提供了一种具有磷光圆偏振发光材料的制备方法，具体包括如下步骤：
1)将具有完整晶体结构的苯偶酰分子分散在难溶溶剂中，在微观上形成各向异性环境。
2)将苯偶酰溶液掺杂在聚乙烯醇薄膜中。
3)对相应的苯偶酰@聚乙烯醇薄膜进行圆偏振光谱测试，发现可以得到具有对映信号的圆偏振信号(图1)。
实施例二、
本实施例提供了一种基于无手性结构有机染料的有机圆偏振荧光发光材料的制备方法，具体包括如下步骤：、
1)将罗丹明B染料掺杂在聚乙烯醇薄膜中。
2)通过对薄膜的拉升与干燥定型得到具有宏观各向异性的罗丹明B@聚乙烯醇薄膜。
3)对相应的罗丹明B@聚乙烯醇薄膜进行圆偏振光谱测试，发现可以得到具有拉伸方向、强度依赖性的圆偏振信号(图2)。
实施例三、
本实施例提供了一种基于聚集诱导发光有机染料的有机圆偏振发光材料制备方法，具体包括如下步骤：
1)将四苯乙烯染料以不同的浓度掺杂在聚乙烯醇薄膜中。
2)通过对薄膜的拉升与干燥定型得到具有宏观各向异性的四苯乙烯@聚乙烯醇。
3)对相应的四苯乙烯@聚乙烯醇薄膜进行圆偏振光谱测试，发现在拉伸强度相同的条件下，四苯乙烯在聚乙烯醇中的浓度会影响到四苯乙烯@聚乙烯醇薄膜的圆偏振信号(图3)。
实施例四、
本实施例提供了一种基于无机硒化镉量子点的无机圆偏振发光材料制备方法，具体包括如下步骤：
1)将具有610nm发射的无机硒化镉量子点掺杂在聚乙烯醇薄膜中。
2)通过对薄膜的拉升与干燥定型得到具有宏观各向异性的硒化镉量子点@聚乙烯醇薄膜。
3)对相应的硒化镉量子点@聚乙烯醇薄膜进行圆偏振光谱测试，发现可以得到具有拉伸方向、强度依赖性的圆偏振信号(图4)。
实施例五、
本实施例提供了一种基于周期性结构的有机圆偏振发光材料制备方法，具体包括如下步骤：
1)将苯偶酰分子在二氯甲烷中溶解，并在室温条件下培养单晶。
2)单晶本身具有各向异性的环境和周期性的结构。
3)对一块苯偶酰晶体进行角度依赖的圆偏振光谱测试，发现可以得到具有角度依赖性的圆偏振信号(图5)。
以上对本申请实施例所提供的一种圆偏振发光材料的开发及其制备方法进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。
Claims (10)
1.一种圆偏振发光材料的制备方法，其特征在于，所述方法包括以下步骤：
步骤(1)在周期性材料或是无定型材料中制备发光材料；
步骤(2)人为构建或提供发光材料所处的介电常数各向异性的环境；
步骤(3)对发光材料进行圆偏振光谱测试，得到具有对映信号的圆偏振信号；
步骤(4)采用诱导环境产生介电常数各向异性的方法，使发光材料形成可调控的圆偏振发光材料。
2.根据权利要求1所述的制备方法，其特征在于，所述步骤(1)中，发光材料的波长范围包括从紫外光到可见光区到红外光。
3.根据权利要求1所述的制备方法，其特征在于，周期性材料包括具有宏观周期性的晶体材料和微观周期性的有序组装材料。
4.根据权利要求1所述的制备方法，其特征在于，无定型材料包括聚合物或玻璃态基质无定型材料。
5.根据权利要求1所述的制备方法，其特征在于，人为构建的各向异性环境包括结构形变，应力变化带来的介电常数的各向异性的变化。
6.根据权利要求5所述的制备方法，其特征在于，对薄膜材料或固体材料的加压或拉伸诱导的结构形变或应力变化带来的介电常数的各向异性的变化。
7.根据权利要求2所述的制备方法，其特征在于，发光的机理荧光发射或磷光发射。
8.根据权利要求1-7中任一项所述的制备方法所制备得到的圆偏振发光材料，其特征在于，所述的可调控的圆偏振发光材料的圆偏振信号根据环境的改变或根据测试角度的改变而改变。
9.根据权利要求8所述的圆偏振发光材料，其特征在于，其圆偏振发光信号随着测试方向的改变而改变。
10.根据权利要求8所述的圆偏振发光材料，其特征在于，用于制备的发光材料包括有机发光材料或无机材料。
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| CN111646496A (zh) * | 2020-04-30 | 2020-09-11 | 南京理工大学 | 具有高偏振特性的高度有序钙钛矿纳米片薄膜及制备方法 |
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| CN112513694A (zh) * | 2018-07-25 | 2021-03-16 | 日东电工株式会社 | 偏光膜和偏光膜的制造方法 |
| CN111646496A (zh) * | 2020-04-30 | 2020-09-11 | 南京理工大学 | 具有高偏振特性的高度有序钙钛矿纳米片薄膜及制备方法 |
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