于颖,曹丙强

• 1:济南大学材料科学与工程学院

摘要(Abstract)：

以溴化铯、溴化银和溴化铋为原料，采用机械球磨工艺制备无铅双钙钛矿Cs_2AgBiBr_6纳米粉体；在一定的球磨转速、研磨球与物料的质量比条件下，利用X射线衍射仪、拉曼光谱仪、激光粒度分析仪、扫描电子显微镜、紫外可见分光光度计、稳态荧光光谱和热重分析仪等手段对制得的Cs_2AgBiBr_6纳米粉体进行测试和表征，研究球磨时间对纳米粉体Cs_2AgBiBr_6的纯度、粒径和形貌的影响，并对Cs_2AgBiBr_6纳米粉体进行光学性质分析和热重分析。结果表明，随着球磨时间的增加，Cs_2AgBiBr_6纳米粉体最终达到纯相，粒径逐渐减小至约100 nm,颗粒形状由棒状变为圆形颗粒；在球磨转速为500 r/min、研磨球与物料的质量比为4.5∶1时，最佳球磨时间为12 h; Cs_2AgBiBr_6粉体禁带宽度为1.97 eV,发光峰位的波长为630 nm,属可见光发光波段；Cs_2AgBiBr_6粉体在温度为430℃时发生分解，在室温下可长久保存。

关键词(KeyWords)： 球磨工艺;无铅双钙钛矿;球磨时间;纳米粉体;光学性质

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目,编号：51872161;; 国家重点研发计划项目,编号：2022YFC3700801

作者(Author): 于颖,曹丙强

DOI: 10.13732/j.issn.1008-5548.2023.06.009

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