手性苯乙胺配体诱导的CsPbBr_(3)量子点的圆偏振发光  

Circularly Polarized Luminescence of CsPbBr_(3)Quantum Dots Induced by Chiral Phenylethylamine Ligands

作　　者：张丽媛[1] 詹传郎 ZHANG Liyuan;ZHAN Chuanlang(College of Chemistry and Environmental Science,Inner Mongolia Normal University,Hohhot 010022,China;Key Laboratory of Advanced Materials Chemistry and Devices of the Department of Education(AMC&DLab)of Inner Mongolia Autonomous Region,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特010022 [2]先进材料化学与器件内蒙古自治区高等学校重点实验室,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报(自然科学版)》2025年第1期47-56,共10页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目“手性稀土配合物圆偏振电致发光性能研究”(U23A20593);“非手性化合物的分子手性合成”(22171151);内蒙古自治区自然科学基金资助项目“AIEgen手性聚集体的构筑与圆偏振发光性能研究”(2021MS02004);内蒙古师范大学科研启动基金资助项目“激发态化学与器件”(112/1004031962)。

摘　　要：首先通过改变胺配体的链长度,从油胺(OAm)、十二胺(DDA)、辛胺(OA)到手性苯乙胺(PEA),发现引入手性苯乙胺配体后,CsPbBr_(3)量子点的光致发光量子效率(PLQY)最高,为44.9%,且其显示圆偏振发光(CPL)性能,发光不对称因子为0.005。其次通过改变手性苯乙胺与非手性油胺、十二胺或辛胺的摩尔比例来共同钝化量子点,在苯乙胺比例为75%时得到的PLQY和发光不对称因子(g_(lum))均最大。其中手性苯乙胺与非手性辛胺的比例为3∶1时获得了70.1%的PLQY和-0.027/+0.025的g_(lum)。Oleylamine(OAm),dodecylamine(DDA),octylamine(OA),and chiral phenylethylamine(PEA)were selected as amine ligands with different chain lengths for CsPbBr_(3)quantum dots.It was observed that the introduction of chiral PEA ligands resulted in the highest photoluminescence quantum yield(PLQY)of 44.9%,and circularly polarized luminescence was presented with a luminescence dissymmetry factor(g_(lum))of 0.005.Further,the quantum dots were copassivated at different molar ratios of chiral PEA to non-chiral OAm,DDA,or OA.In the case of the PEA proportion of 75%,both PLQY and g_(lum)were the highest.A PLQY of 70.1%and g_(lum)values of−0.027/+0.025 were obtained at a 3∶1 ratio of chiral PEA to non-chiral OA.

关 键 词：钙钛矿量子点 手性配体 配体钝化 圆偏振发光 

分 类 号：O641.4[理学—物理化学]