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通过水相法合成Eu~(3+)掺杂ZnS纳米晶(ZnS:Eu),合成的ZnS:Eu纳米晶具有立方晶形结构,粒径约为2 nm~4 nm,荧光谱图中可以检测到Eu~(3+)的5D0-7FJ(J=0,1,2)的特征吸收峰,这是由于在ZnS:Eu纳米晶内Eu~(3+)周围存在电荷缺陷和晶格缺陷导致的。为了实现ZnS:Eu纳米晶的功能性和可加工性,通过新颖的方法配体交换法合成了5-(2-甲基丙烯酰乙氧基甲基)-8-羟基喹啉(MQ)表面修饰的ZnS:Eu纳米晶(MQ-ZnS:Eu),表面修饰后的MQ-ZnS:Eu纳米晶与ZnS:Eu纳米晶相比较发光效率显著提高,且发射峰发生蓝移,蓝移约80 nm~90 nm,这可能是MQ与ZnS:Eu纳米晶之间协同作用导致的。
Eu (3+) doped ZnS nanocrystals (ZnS: Eu) were synthesized by aqueous method. The synthesized ZnS: Eu nanocrystals have a cubic crystal structure with a size of about 2 nm to 4 nm. The fluorescence spectrum can be detected To the characteristic absorption peak of 5D0-7FJ (J = 0,1,2) in Eu ~ (3+) due to the existence of charge defects and lattice defects around Eu ~ (3 +) in the ZnS: Eu nanocrystals of. In order to realize the functionalization and workability of ZnS: Eu nanocrystals, the surface of 5- (2-methacryloyloxymethyl) -8-hydroxyquinoline (MQ) was synthesized by a novel method of ligand exchange Compared with the ZnS: Eu nanocrystals, the luminescence efficiency of the modified ZnS: Eu nanocrystals (MQ-ZnS: Eu) and the surface-modified MQ-ZnS: Eu nanocrystals is significantly increased, and the emission peak is blue shifted by about 80 nm ~ 90 nm, which may be due to the synergy between MQ and ZnS: Eu nanocrystals.