CAJ | 학술논문

以 NaTeO3为碲源,巯基乙酸(TGA)为稳定剂,合成 CdTe 量子点。研究 Cd2+的浓度、Cd2+-TGA前驱体室温静置时间对 CdTe 量子点荧光光谱、荧光量子效率的影响,并用 X射线粉末衍射仪和透射电子显微镜对其结晶性能、结构以及形貌进行表征。实验表明,所制备的 CdTe 量子点具有闪锌矿结构和球形形貌。且在 Cd2+-TGA 前驱体室温静置50 min后参与回流,Cd2+浓度为0.00067 mol/L 时,荧光量子效率最高可达48.4%。
이 NaTeO3위제원,구기을산(TGA)위은정제,합성 CdTe 양자점。연구 Cd2+적농도、Cd2+-TGA전구체실온정치시간대 CdTe 양자점형광광보、형광양자효솔적영향,병용 X사선분말연사의화투사전자현미경대기결정성능、결구이급형모진행표정。실험표명,소제비적 CdTe 양자점구유섬자광결구화구형형모。차재 Cd2+-TGA 전구체실온정치50 min후삼여회류,Cd2+농도위0.00067 mol/L 시,형광양자효솔최고가체48.4%。
A novel technology was developed for the synthsis of thioglycolic acid(TGA)-capped CdTe quantum dots(QDs)while sodium tellurite was used as the tellurium source.The influence of the concentration of Cd2+and Cd2+-TGA precursor holding time in room temperature on the photoluminescence (PL)and fluorescence quantum yield(QY)were systematically investigated.The obtained QDs were characterized by X-ray powder diffraction(XRD)and transmission electron microcopy(TEM).The results show that the CdTe QDs are of zinc-blended crystal structure in a sphere-like shape.The CdTe QDs with maximum quantum yiele of 48.4% with the condition of the Cd2+-TGA precursors were static for 50 min in room temperature before backflow and the concentration of Cd2+ was 0.00067 mol/L.