CAJ | 학술논문

采用改进后的合成方法,以Se和ZnO粉末为原料,在十六胺(HDA)、月桂酸(LA)和三辛基膦(TOP)有机溶剂体系中合成了胶体ZnSe和ZnS量子点.主要研究了溶剂配比、反应温度及生长时间对ZnSe量子点粒径和光学性质的影响.结果表明:制得的ZnSe和ZnS量子点均是纤锌矿型结构,且具有较好的尺寸均匀性、分散性及荧光特性.粒子直径可控制在4.5～8 nm范围内.采用参数n(ZnO):n(HDA):n(LA)=1:2.1:5.2,c(TOPSe)=1 mol/L,在280 ℃成核,240 ℃生长条件下合成的ZnSe量子点具有最佳的尺寸范围,并且随着生长时间的延长,粒径变大,荧光发射峰明显红移.
채용개진후적합성방법,이Se화ZnO분말위원료,재십륙알(HDA)、월계산(LA)화삼신기련(TOP)유궤용제체계중합성료효체ZnSe화ZnS양자점.주요연구료용제배비、반응온도급생장시간대ZnSe양자점립경화광학성질적영향.결과표명:제득적ZnSe화ZnS양자점균시섬자광형결구,차구유교호적척촌균균성、분산성급형광특성.입자직경가공제재4.5～8 nm범위내.채용삼수n(ZnO):n(HDA):n(LA)=1:2.1:5.2,c(TOPSe)=1 mol/L,재280 ℃성핵,240 ℃생장조건하합성적ZnSe양자점구유최가적척촌범위,병차수착생장시간적연장,립경변대,형광발사봉명현홍이.
Adopting improved metal-organic "Green method", colloidal ZnSe, ZnS quantum dots (QDs) were prepared using cheap and low toxic zinc oxide (ZnO) in an organic solvent system of 1-hexadecylamine (HDA), lauric acid (LA) and tri-n-octylphosphine (TOP). The effects of solvents ratio, reaction temperature and growth time on the QD size and photoluminescence properties of ZnSe and ZnS QDs were studied. The results showed that ZnSe and ZnS QDs exhibit the wurtzite structure, good uniformity, dispersity and fluorescent characteristics. The average diameters are in the range of 4.5～8 nm. Choosing the optimal parameters, n(ZnO):n(HDA):n(LA)=1:2.1:5.2, c_(TOPSe)=1 mol/L, ZnSe QDs with large distributioin range of the size were obtained under the condition of nucleation at 280 ℃ and growth at 240 ℃. With increasing the growth time, the QD size become larger and the emission peak obviously shifts to red.