| 超小晶粒锡掺杂CsPbBr3蓝光量子点的合成及其光学性能研究 |
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| 引用本文： | 曾凡菊,谭永前,胡伟,唐孝生,张小梅,尹海峰.超小晶粒锡掺杂CsPbBr3蓝光量子点的合成及其光学性能研究[J].物理学报,2022(4):219-225. |
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| 作者姓名： | 曾凡菊 谭永前 胡伟 唐孝生 张小梅 尹海峰 |
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| 作者单位： | 凯里学院大数据工程学院;重庆大学光电工程学院;重庆邮电大学光电学院 |
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| 基金项目： | 贵州省科技计划项目(批准号:ZK[2021]245);国家自然科学基金(批准号:61975023,61875211,51602033,61520106012);凯里学院博士专项课题(批准号:BS202004,BS201301);凯里学院学术新苗培养及创新探索专项课题(批准号:黔科合平台人才[2019]01-4);贵州省教育厅创新群体重大研究项目(批准号:黔教合KY字[2018]035)资助的课题. |
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| 摘 要： | 近年来,铅卤钙钛矿CsPbX3 (X=Cl,Br或I)因其具有荧光波段可调、荧光量子产率高(Photoluminescence quantum yield,PLQY)以及荧光半峰宽窄等优点而被广泛应用于光电器件领域.然而,与PLQY接近于100%的绿光和红光相比,蓝光卤素钙钛矿的PLQY仍比较低.在此,采用过饱和结晶的方法在室温下合成了粒径低于4 nm的超小晶粒锡(Sn)掺杂CsPbBr3量子点,并对其结构特性和光学特性进行了研究.结果表明:随着SnBr2添加量的增大,量子点晶粒的粒径略微减小,荧光发射峰发生蓝移,粒径由3.33 nm (SnBr2为0.03 mmol)减小到2.23 nm(SnBr2为0.06 mmol时),对应的荧光发射峰由490 nm蓝移至472 nm.当SnBr2添加量为0.05 mmol时合成的超小晶粒锡掺杂CsPbBr3量子点显示出最优的光学性能,其粒径约为2.91 nm,对应的XRD各晶面衍射峰强度最强,...
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| 关 键 词： | 超小晶粒 锡掺杂CsPbBr3量子点 光学性能 荧光稳定 |
Synthesis and optical properties of ultra-small Tin doped CsPbBr3 blue luminescence quantum dots |
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| Zeng Fan-Ju,Tan Yong-Qian,Hu Wei,Tang Xiao-Sheng,Zhang Xiao-Mei,Yin Hai-Feng.Synthesis and optical properties of ultra-small Tin doped CsPbBr3 blue luminescence quantum dots[J].Acta Physica Sinica,2022(4):219-225. |
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| Authors: | Zeng Fan-Ju Tan Yong-Qian Hu Wei Tang Xiao-Sheng Zhang Xiao-Mei Yin Hai-Feng |
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| Affiliation: | (School of Big Data Engineering,Kaili University,Kaili 556011,China;College of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China;College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
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| Abstract: | All-inorganic perovskite CsPbX3(X=Cl,Br and I)quantum dots(QDs)have been wildly utilized in optoelectronic devices due to their tunable photoluminescence,high photoluminescence quantum yield(PLQY),and narrow-line width photoluminescence.However,the blue luminescence PLQY of CsPbX3 perovskite quantum dots is still lower than their red and green luminescence counterparts(PLQYs nearly 100%).Here in this work,we present a handy strategy to synthesise the ultra-small blue luminescence Tin-doped CsPbBr3 perovskite QDs by supersaturated recrystallization synthetic approach at room temperature,and the particle size of as-prepared QDs is lower than 4 nm.The crystal structure and optical property of Tin doped CsPbBr3 QDs are characterized by XRD,TEM,ultraviolet-visible spectrophotometer,and fluorescence spectrophotometer.The results show that the particle size of as-prepared QDs is slightly shrunk from 3.33 nm(SnBr20.03 mmol)to 2.23 nm(SnBr20.06 mmol)as the SnBr2 adding quantity increases,but there is no obvious change in the lattice spacing of doped QDs.The partial substitution of Pb for Tin leads the optical spectra to blue-shift from 490 nm(SnBr20.03 mmol)to 472 nm(SnBr20.06 mmol).The highest PLQY and the strongest XRD diffraction of ultra-small Tin doped CsPbBr3blue luminescence QDs are obtained by adding SnBr20.05 mmol,and the blue luminescence peak is located at 472 nm with the PLQY of 53.4%.There is no any change in PL peak of Tin doped CsPbBr3 QDs(SnBr20.05 mmol)by storing it under the ambient atmosphere for 15 days,and the PLQY of Sn2+doped QDs is still 80%of the initial after 15 days.It is concluded that the crystallization and optical property can be effectively improved in Tin doped CsPbBr3 QDs by partially replacing appropriate quantity of Pb by Tin. |
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| Keywords: | ultra-small tin doped CsPbBr3quantum dots optical property stable luminescence |
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