InP量子点的掺杂及其光学性能  

Doping of InP Quantum Dots and Its Optical Properties

作　　者：杨锁龙[1] 王晓方[1] 蒋春丽[1] 赵雅文[1] 曾荣光[1] 王怀胜[1] 赖新春[1] YANG Suo-Long WANG Xiao-Fang JIANG Chun-Li ZHAO Ya-Wen ZENG Rong-Guang WANG Huai-Sheng LAI Xin-Chun(Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou 621908, China)

机构地区：[1]表面物理与化学重点实验室,江油621908

出　　处：《无机材料学报》2016年第10期1051-1057,共7页Journal of Inorganic Materials

基　　金：表面物理与化学重点实验室学科发展基金(ZDXKFZ201217)~~

摘　　要：采用原位成核掺杂法合成了Li、Zn金属离子掺杂的InP量子点(分别记为Li:InP和Zn:InP),并研究了掺杂剂对量子点的结构、尺寸和光学性能的影响。研究结果表明,Li^+、Zn^(2+)掺杂的InP量子点结晶度较高且尺寸均匀。虽然Li^+掺杂未引起InP量子点的结构发生变化,Li^+未进入InP晶格,但是抑制了InP量子点的成核与长大,使其吸收谱和荧光谱均发生大幅度的蓝移。Zn掺杂同样也抑制InP量子点的成核与长大,并且形成InP/Zn_3P_2/ZnO复合核壳结构,显著增强了InP量子点的荧光,尤其是当Zn掺杂浓度(Zn/In原子比)为0.2时,InP量子点的荧光强度增加近100多倍,这对短波长InP量子点的合成具有一定的参考价值。The Li^＋ and Zn^2＋ doped InP quantum dots （denoted as Li： InP QDs and Zn： InP QDs） were synthesized via an in-situ nucleation doping approach. Effects of dopant on the structure, size and optical property of QDs were investigated in detail. The results showed that Li： InP and Zn： InP QDs were well crystallized with uniform size. In the case of Li^＋＋ dopant, Li^＋ did not enter the InP lattice, but inhibited the nucleation and growth of InP QDs. Blue shifts were observed in UV-Vis absorption spectra and fluorescence spectra due to the quantum size effect of Li： InP QDs. Compared with Li＋, Zn^＋ dopant also inhibited nucleation and growth of InP QDs, but InP/Zn3P2/ZnO com- posite was produced with a core-shell structure, resulted in a great improvement of photoluminescence （PL） inten- sity. Especially when the doping concentration of Zn/In atomic ratio was 0.2, the PL intensity was increased more than 100 times as compared with that of undoped InP QDs. This work may provide a considerable approach to the synthesis of short-wavelength InP QDs.

关 键 词：磷化铟 量子点 掺杂 光学性能 

分 类 号：TL812[核科学技术—核技术及应用]