氨系水溶性CdTe量子点的生长规律研究  

GROWTH RHYTHM OF WATER-SOLUBLE CDTE QDS IN ITS OPTIMIZED SYNTHESIS

作　　者：林谦[1] 陈盛[1] 

机构地区：[1]福建师范大学福清分校海洋与生化工程学院,福建福清350300

出　　处：《井冈山大学学报（自然科学版）》2015年第5期37-42,65,共7页Journal of Jinggangshan University (Natural Science)

基　　金：福建省教育厅科技计划项目(JB11261;JB09242;JA11283)

摘　　要：在密闭容器的水相中以过量的NaBH4保护合成的碲源与以巯基丙酸为稳定剂的镉溶液合成CdTe量子点,无需氮气保护,简化了合成工艺。合成的样品用透射电子显微镜（TEM）对其形貌进行表征。用吸收光谱、荧光光谱、红外光谱研究其光谱特征。考察了17mmol前驱浓度下的CdTe在不同条件获得的量子点的发光特征。试验结果表明：在碱介中控制不同的反应时间可获得发射绿光到红光区间的荧光波长可调的CdTe量子点,荧光光谱半峰宽约37~60 nm、峰形对称。量子点储藏半年后外量子效率仍达16.45%,发光效率高。通过实验建立量子点的OA和OR生长模型,探讨和分析了CdTe量子点的生长规律。A simplified synthesis process of CdTe QDs was studied in this paper. First,the Te compound was synthesized in an airtight container with the protection of an excess of NaHB4 and the lack of N2. Then it was used to synthesize CdTe QDs in aqueous phase,with the MPA as a stabilizer. Based on this,the shape and appearance of CdTe QDs were characterized through TEM and the absorption,fluorescence and IR spectra were investigated. Through the experiment,the quantum dot emitting characteristics were studied from the reactions of the same concentration of 17 mmol CdTe in different conditions. The results showed that CdTe QDs could be obtained by controlling different reaction time in alkaline condition,they could emit light in the range of green light to red light and its fluorescence wavelength was adjustable. The peak width at half-height of fluorescence spectra was about 37 nm to 60 nm and the peak shape was symmetrical. Quantum dot being stored for half a year,its QY still was 16.45%,meaning a high luminous efficiency. Through the experiment,the growing model of OA and OR were set up,and the regular pattern of the growth of CdTe QDs was explored and analyzed.

关 键 词：CDTE量子点 水溶性 优化合成 生长规律 OA和OR模型 

分 类 号：O657.3[理学—分析化学]