CAJ | 학술논문

以合成的十碳酸镉作为Cd前驱体,十八烯作为单质硒溶剂,并添加十八胺作为活性剂,在无三丁基膦或三辛基膦参与的条件下,以较低温度制备了具有闪锌矿结构的高质量的CdSe纳米晶.利用吸收光谱、荧光光谱(PL)、X射线衍射(XRD)、透射电镜(TEM)对不同反应时间得到的CdSe纳米晶进行形貌和光谱性质表征.实验结果表明,采用该无膦法只需调控反应时间就可得到粒径均一、分散性好的CdSe纳米晶,其荧光波长可覆盖470-630 nm的可见光区,而荧光峰半高宽则始终保持在24-30 nm之间并具有较高的荧光量子产率(535 nm处大于60%).最后,对CdSe纳米晶量子产率随反应时间变化的原因进行了分析.
이합성적십탄산력작위Cd전구체,십팔희작위단질서용제,병첨가십팔알작위활성제,재무삼정기련혹삼신기련삼여적조건하,이교저온도제비료구유섬자광결구적고질량적CdSe납미정.이용흡수광보、형광광보(PL)、X사선연사(XRD)、투사전경(TEM)대불동반응시간득도적CdSe납미정진행형모화광보성질표정.실험결과표명,채용해무련법지수조공반응시간취가득도립경균일、분산성호적CdSe납미정,기형광파장가복개470-630 nm적가견광구,이형광봉반고관칙시종보지재24-30 nm지간병구유교고적형광양자산솔(535 nm처대우60%).최후,대CdSe납미정양자산솔수반응시간변화적원인진행료분석.
High quality zinc blende CdSe nanocrystals were successfully synthesized using an environmental friendly method. Pre-synthesized cadmium decanoate was used as the Cd precursor and selenium powder dissolved in octadecene was used as the Se precursor. The use of expensive and toxic tributylphosphine or trioctylphosphine was thus avoided. The properties and structures of the as-synthesized CdSe nanocrystals were characterized by absorption spectroscopy, photoluminescence (PL) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The PL emission peak of the as-synthesized CdSe nanocrystals could be easily tuned from 470 to 630 run using different reaction times. The quality of the crystals was high and this was confirmed by their high quantum yields (exceeding 60% at 535 nm) and their narrow size-distributions with full width at half maximum values between 24 and 30 run.