CAJ | 학술논문

以二乙基二硫代氨基甲酸锌(ZDC)为 ZnS 的前驱体材料、三辛基膦(TOP)为主要配体，在温度不高于200℃的条件下合成了广谱发光的核壳结构 CuInS2/ ZnS(CIS/ ZnS)量子点.研究了 ZDC 用量、壳层包裹温度和配体对 CIS/ ZnS 光学特性及荧光量子产率的影响.结果表明，使用 ZDC 可在相对较低的温度下实现 ZnS的包裹过程，并且随着包裹温度的提高， ZnS 的包裹速度明显加快.吸收光谱、荧光光谱及 X 射线衍射分析结果表明，使用 TOP 为配体合成的 CIS/ ZnS 量子点的明显吸收峰为其激发吸收峰.使用荧光分光光度计、高分辨透射电子显微镜、 X 射线光电子能谱仪和傅里叶变换红外光谱仪对使用不同配体进行壳层包裹得到的样品进行了表征.结果表明，在 ZnS 的包裹过程中，配体 TOP 和十二硫醇作为有机层包覆在颗粒表面也会影响量子点的光学性能和晶体生长速度.使用 TOP 能够加速 ZnS 的包裹速度，形成的颗粒尺寸均一，其荧光波长可蓝移至550 nm.
이이을기이류대안기갑산자(ZDC)위 ZnS 적전구체재료、삼신기련(TOP)위주요배체，재온도불고우200℃적조건하합성료엄보발광적핵각결구 CuInS2/ ZnS(CIS/ ZnS)양자점.연구료 ZDC 용량、각층포과온도화배체대 CIS/ ZnS 광학특성급형광양자산솔적영향.결과표명，사용 ZDC 가재상대교저적온도하실현 ZnS적포과과정，병차수착포과온도적제고， ZnS 적포과속도명현가쾌.흡수광보、형광광보급 X 사선연사분석결과표명，사용 TOP 위배체합성적 CIS/ ZnS 양자점적명현흡수봉위기격발흡수봉.사용형광분광광도계、고분변투사전자현미경、 X 사선광전자능보의화부리협변환홍외광보의대사용불동배체진행각층포과득도적양품진행료표정.결과표명，재 ZnS 적포과과정중，배체 TOP 화십이류순작위유궤층포복재과립표면야회영향양자점적광학성능화정체생장속도.사용 TOP 능구가속 ZnS 적포과속도，형성적과립척촌균일，기형광파장가람이지550 nm.
CuInS2 / ZnS( CIS / ZnS) quantum dots( QDs) were synthesized below 200 ℃ with zinc diethyl dithiocarbamate(ZDC) as ZnS precursor materials and trioctylphosphine(TOP) as the main capping ligands. The influence of ZDC amount, shell growth temperature and ligands on the optical properties and quantum yield of CIS / ZnS quantum dots were investigated. The results showed that the growth of ZnS shell could happen above 150 ℃ and ZnS growth speed was accelerated by increasing temperature. The absorption peak of prepared CIS / ZnS using TOP as ligands was defined as exctionic absorption through photoluminescence(PL) spectromety and X-ray diffraction analysis. The samples were characterized by PL spectrometer, high resolution transmission electron microscope, energy dispersive X-ray spectrometer and Fourier transform infrared spectrometer. The results showed that ligands of TOP and dodecanethiol were overcoated on the surface of nanoparticles as organic layer, which would affect optical properties and crystal growth speed. TOP could increase the shell growth speed and the CIS / ZnS QDs with uniform size were obtained. The PL emission wavelength could be extended to 550 nm.