苯乙胺基配体对LARP法合成纳米片的作用探究  

Investigation of the Role of Phenethylamine-Based Ligands in the Synthesis of Perovskite Nanosheets via the LARP Method

作　　者：宋佳闻 刘宇丰 毛经伟 魏一 SONG Jia-wen;LIU Yu-feng;MAO Jing-wei;WEI Yi(Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,Dalian University of Technology,Dalian,Liaoning,116024)

机构地区：[1]大连理工大学三束材料改性教育部重点实验室,辽宁大连116024

出　　处：《贵州师范学院学报》2024年第12期14-21,共8页Journal of Guizhou Education University

基　　金：国家自然科学基金委员会青年科学基金项目“基于二维Ruddlesden-Popper型钙钛矿的高稳定性太阳电池研究”(61704018);辽宁省科学技术厅省自然基金资助计划“钙钛矿量子点探针平台的构筑及其在肿瘤无创诊疗中的应用研究”(2022-YGJC-23);中央高校基本科研业务费交叉探索科研专题医工交叉联合基金“新型钙钛矿量子点荧光探针的制备及其在肿瘤诊疗中的应用”(DUT23YG127);大连理工大学研究生教改基金。

摘　　要：利用配体辅助再沉积法(LARP法)合成了一系列基于PEA2MAn-1Pb_nI3n+1的二维钙钛矿纳米晶片。为了探究碘化苯乙铵盐(PEAI)在合成中的作用,设计了一系列PEAI的添加方案,讨论了其用量的影响及其与他配体的关联作用。实验发现,PEAI的减少或过量均会导致高n值纳米片组分增多,并引起主发射峰移动与峰数变化。通过控制反应物比例,能够形成特定n值组分的单峰。在使用苯乙基胺与铵作为配体的对比实验中,发现由苯乙铵制备的纳米片具有更好的均一性。作为短链配体,适量添加PEAI能够促进纳米片的形成,因此更有助于形成厚度分布集中的单分散胶体溶液。通过控制反应物比例,最终得到了可在大气合成且性质较稳定的在530 nm~750 nm范围内具有独立发射峰的不同n值的纳米晶片。研究发现,苯乙铵盐能促进单一厚度纳米片的形成,从而有效调控其光学性能。以上发现为钙钛矿纳米晶在光电子器件中的应用提供了参考意义。A series of 2D perovskite nanocrystals based on PEA 2MA n-1 Pb nI 3n+1 were synthesized using the ligand-assisted reprecipitation(LARP)method.To investigate the role of phenylethylammonium iodide(PEAI)in the synthesis process,a series of PEAI addition schemes were designed,discussing the effects of its amount and its interaction with other ligands.The experiments revealed that both a reduction or excess of PEAI led to an increase in high n-value nanoplate components,causing shifts in the main emission peak and changes in the number of peaks.By controlling the reactant ratio,single peaks corresponding to specific n-value components could be formed.In comparison experiments using phenylethylamine and ammonium as ligands,it was found that nanoplates prepared with phenylethylammonium exhibited better uniformity.As a short-chain ligand,the appropriate addition of PEAI could promote nanoplate formation,thus contributing to the formation of monodisperse colloidal solutions with concentrated thickness distribution.By controlling the reactant ratio,nanoplates with different n-values and independent emission peaks within the range of 530 nm~750 nm were successfully synthesized,exhibiting relatively stable properties when synthesized in air.It is ultimately found that phenylethylammonium salts promote the formation of nanoplates with a single thickness,thereby effectively tuning their optical properties.These findings provide valuable insights for the application of perovskite nanocrystals in optoelectronic devices.

关 键 词：有机铵盐 光学特性调控 钙钛矿 纳米片 

分 类 号：TB383.1[一般工业技术—材料科学与工程]