CN111252801A - 一种双钙钛矿Cs2AgSbBr6纳米晶体及合成和应用 - Google Patents

一种双钙钛矿Cs2AgSbBr6纳米晶体及合成和应用 Download PDF

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CN111252801A
CN111252801A CN201811453823.4A CN201811453823A CN111252801A CN 111252801 A CN111252801 A CN 111252801A CN 201811453823 A CN201811453823 A CN 201811453823A CN 111252801 A CN111252801 A CN 111252801A
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韩克利
杨斌
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Dalian Institute of Chemical Physics of CAS
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Abstract

一种新型的双钙钛矿材料:Cs2AgSbBr6双钙钛矿纳米晶及合成，其特征在于采用胶体法制备尺寸较小且粒径分布较为均一的Cs2AgSbBr6纳米颗粒，是一种新的双钙钛矿材料。该材料有在太阳能电池，光电探测器及发光显示等领域的应用潜力。

Description

一种双钙钛矿Cs2AgSbBr6纳米晶体及合成和应用
技术领域
本发明涉及钙钛矿材料，尤其涉及一种新型双钙钛矿Cs2AgSbBr6纳米晶及其合成
背景技术
近年来，铅基钙钛矿材料被广泛应用于太阳能电池、光电探测器、发光显示等领域研究，具有广阔的应用前景。然而其中含有的重金属元素铅对人体和环境有害，而且铅基钙钛矿在空气中稳定性差，限制了其商业化生产及应用。寻找非铅且稳定性好的钙钛矿材料来成为当下研究热点和难点。
目前人们已经开始寻找非铅钙钛矿材料，作为元素周期表中与铅位于同一主族的元素，锡和锗已经被用来发展非铅钙钛矿，但这类材料的缺点是稳定性差，在空气中容易被氧化。除此之外，正三价的铋和锑也可以形成钙钛矿结构，同时具有较高的稳定性，然而此类钙钛矿为二维或零维钙钛矿，载流子迁移率低，不适合用于光电子器件。一个可行的方案是用正一价和正三价的阳离子组合取代铅，形成所谓的非铅双钙钛矿结构，此类钙钛矿既具有三维钙钛矿结构又具有较高稳定性。目前基于正一价银(Ag)和正三价铋(Bi)的双钙钛矿Cs2AgBiX6(X：Cl，Br，I)已经被合成出来。而基于正一价Ag和正三价锑(Sb)的双钙钛矿Cs2AgSbBr6尚未被报道。
发明内容
本发明的目的是合成了一种新型的双钙钛矿材料即Cs2AgSbBr6双钙钛矿纳米晶体。
本发明目的是通过以下方式实现的：
Cs2AgSbBr6双钙钛矿纳米晶的制备方法，具体包括以下实验步骤：
(1)常温下将一定量的Cs(OAc),Ag(OAc),Sb(OAc)3加入一定比例的十八烯，油酸和油胺的混合物中。该混合物在110℃真空环境下搅拌45分钟。然后在氮气环境下将温度升至180℃
后，迅速将一定量的三甲基溴硅烷注入，反应三十秒后，将该反应物放入冰水混合物中讲至室温。将反应物进行8000转离心15分钟后，将上清液倒掉，保留橙红色的沉淀。该沉淀即为Cs2AgSbBr6纳米晶体。Cs2AgSbBr6纳米晶可以分散在正己烷或辛烷中形成胶体。
1.所述制备方法，其特征在于：控制步骤(1)Cs(OAc),Ag(OAc),Sb(OAc)3的摩尔比为0.71:0.5:0.5。
2.所述制备方法，其特征在于：控制步骤(1)十八烯,油酸,油胺的比例为10:2.5:0.66。
3.所述制备方法，其特征在于：控制步骤(1)三甲基溴硅烷的注射温度为180℃。本发明有益效果在于：
(1)本发明制备了一种新型双钙钛矿纳米晶即Cs2AgSbBr6纳米晶体。
(2)本发明制备的纳米晶可分散在溶剂中形成胶体。
附图说明
图1为实施例1制备的Cs2AgSbBr6纳米晶透射电子显微镜图(TEM)
图2为实施例1制备的Cs2AgSbBr6纳米晶XRD数据
具体实施方式
下面结合附图及具体实施案例来对本发明作进一步的详细说明。
实施例1：将Cs(OAc)(0.71mmol),Ag(OAc)(0.5mmol),Sb(OAc)3(0.5mmol)溶解在十八烯(10mL),油酸(2.5mL)和油胺(0.66mL)中。该混合物在110℃真空环境下搅拌45分钟。然后在氮气环境下将温度升至180度，迅速将0.5mL三甲基溴硅烷注入，反应三十秒后，将该反应物放入冰水混合物中降至室温。然后将反应物进行8000转离心15分钟，然后将上清液倒掉，保留橙红色的沉淀。该沉淀即为Cs2AgSbBr6纳米晶。Cs2AgSbBr6纳米晶体可以分散在正己烷或辛烷中形成胶体。
Figure BDA0001887292960000021
表1Cs2AgSbBr6纳米晶原子坐标数据。

Claims (6)

1.一种Cs2AgSbBr6双钙钛矿纳米晶的合成方法，其特征在于：包括以下步骤：
常温下将0.71mmol Cs(OAc),0.5mmol Ag(OAc),0.5mmol Sb(OAc)3加入10mL十八烯、2.5mL油酸和0.66mL油胺的混合物中；该混合物在110℃真空环境下搅拌45分钟；然后在氮气环境下将温度升至180度后，将0.5mL三甲基溴硅烷注入，反应三十秒后，将该反应物放入冰水混合物中降至室温；然后将反应物进行8000转离心15分钟，然后将上清液倒掉，保留橙红色的沉淀；该沉淀即为Cs2AgSbBr6纳米晶体。
Cs2AgSbBr6纳米晶可以分散在正己烷或辛烷中形成胶体。
2.根据权利要求1所述的Cs2AgSbBr6双钙钛矿纳米晶的合成方法，其特征在于：控制步骤(1)中的Cs(OAc),Ag(OAc),Sb(OAc)3的摩尔比为0.71:0.5:0.5。
3.根据权利要求1所述的Cs2AgSbBr6双钙钛矿纳米晶的合成方法，其特征在于：十八烯,油酸,油胺的体积比例为10:2.5:0.66。
4.根据权利要求1或3所述的Cs2AgSbBr6双钙钛矿纳米晶的合成方法，其特征在于：控制步骤(1)三甲基溴硅烷的注射温度为180℃，量为0.5mL。
5.一种权利要求1-4任一所述合成方法合成的Cs2AgSbBr6双钙钛矿纳米晶。
6.一种权利要求5所述Cs2AgSbBr6双钙钛矿纳米晶在太阳能电池，光电探测器或发光显示设备中的应用。
CN201811453823.4A 2018-11-30 2018-11-30 一种双钙钛矿Cs2AgSbBr6纳米晶体及合成和应用 Pending CN111252801A (zh)

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CN113072933A (zh) * 2021-04-08 2021-07-06 南京理工大学 一种非铅全无机铟基零维钙钛矿纳米晶体及制作方法

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CN113072933A (zh) * 2021-04-08 2021-07-06 南京理工大学 一种非铅全无机铟基零维钙钛矿纳米晶体及制作方法

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