光子学报 ›› 2019, Vol. 48 ›› Issue (10): 1016002-1016002.doi: 10.3788/gzxb20194810.1016002

• 材料 • 上一篇    下一篇

提纯溶剂对室温合成CsPbBr3量子点性能的影响

李玥1,2, 谢启飞1, 王新中1, 马艳红1   

  1. 1. 深圳信息职业技术学院 电子与通信学院, 广东 深圳 518172;
    2. 内蒙古大学 生态与环境学院, 呼和浩特 010021
  • 收稿日期:2018-12-28 出版日期:2019-10-25 发布日期:2019-04-30
  • 通讯作者: 王新中(1979-),男,教授,博士,主要研究方向为半导体发光材料与器件.Email:xzwang2188@163.com E-mail:xzwang2188@163.com
  • 作者简介:李玥(1994-),女,硕士研究生,主要研究方向为半导体发光材料与器件.Email:13554758896@163.com
  • 基金资助:

    广东省自然科学基金(No.2017A030313337),广东省高等职业技术院校珠江学者岗位计划资助项目(No.2016),深圳市科技计划基础研究项目(No.JCYJ20160509100737182),创新强校工程(No.2017GKCXTD007)

Effect of Purified Solvents on the Performance of Quantum Dots Synthesized at Room Temperature

LI Yue1,2, XIE Qi-fei1, WANG Xin-zhong1, MA Yan-hong1   

  1. 1. College of Electronics and Communication, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China;
    2. College of Ecology and Environment, Inner Mongolia University, Huhhot 010021, China
  • Received:2018-12-28 Online:2019-10-25 Published:2019-04-30
  • Contact: 2019-04-30 E-mail:xzwang2188@163.com
  • Supported by:

    Natural Science Foundation of Guangdong Province(No.2017A030313337), Pearl River Scholar Post Plan Funding Project of Guangdong Higher Vocational and Technical Colleges (No.2016), Shenzhen Science and Technology Plan Basic Research Project (No.JCYJ20160509100737182), The Project of Innovation and Strong School(No.2017GKCXTD007)

摘要:

采用室温重结晶法制备CsPbBr3量子点,分别利用六种常用的极性溶剂对量子点粗液进行高速离心提纯,监测提纯过程中每一步骤后的光致发光光谱,并采用吸收光谱,荧光寿命、X射线衍射分析和透射电镜等表征方法系统表征了六种极性溶剂提纯得到的CsPbBr3量子点.研究表明,通过六种极性溶剂提纯,都可以得到结晶度良好的呈立方体形态的立方相CsPbBr3量子点;在利用六种不同极性溶剂进行提纯过程中,第二次离心得到的上清液具有最为统一的半峰宽和峰值波长;除乙酸乙酯外,第二次离心得到的上清液具有最高的量子产出;比较而言,通过正丙醇、异丙醇、正丁醇特别是异丁醇提纯得到的CsPbBr3量子点具有较高的发光性能.

关键词: 量子点性能, 极性溶剂, 室温重结晶法, CsPbBr3 QDs, 提纯

Abstract:

CsPbBr3 quantum dots were prepared by room temperature recrystallization. The quantum dot crude solution was purified by high-speed centrifugation using six common polar solvents. The photoluminescence spectrum after each step in the purification process was monitored and the absorption spectrum was used. Fluorescence lifetime, X-ray diffraction analysis and transmission electron microscopy were used to characterize the CsPbBr3 quantum dots purified by six polar solvents. The results show that cubic phase CsPbBr3 quantum dots with good crystallinity can be obtained by purification of six polar solvents. The supernatant obtained by the second centrifugation during purification process using six different polar solvents has the most uniform half-width and peak wavelength; except for ethyl acetate, the supernatant obtained by the second centrifugation has the highest quantum yield; in contrast, the CsPbBr3 quantum dots obtained by isobutanol purification have higher Luminescence performance.

Key words: Quantum dot properties, Room temperature recrystallization, CsPbBr3 quantum dots, Polar solvent, Purification

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