井冈山大学学报（自然科学版）
井岡山大學學報（自然科學版）
정강산대학학보（자연과학판）
Journal of Jinggangshan University (Natural Sciences Edition)
2015年
5期
37-42,65
,共7页
CdTe量子点%水溶性%优化合成%生长规律%OA和OR模型
CdTe量子點%水溶性%優化閤成%生長規律%OA和OR模型
CdTe양자점%수용성%우화합성%생장규률%OA화OR모형
CdTe QDs%water-soluble%optimized synthesis%regular pattern of growth%growing model of OA and OR
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17 mmol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。
在密閉容器的水相中以過量的NaBH4保護閤成的碲源與以巰基丙痠為穩定劑的鎘溶液閤成CdTe量子點，無需氮氣保護，簡化瞭閤成工藝。閤成的樣品用透射電子顯微鏡（TEM）對其形貌進行錶徵。用吸收光譜、熒光光譜、紅外光譜研究其光譜特徵。攷察瞭17 mmol前驅濃度下的CdTe在不同條件穫得的量子點的髮光特徵。試驗結果錶明：在堿介中控製不同的反應時間可穫得髮射綠光到紅光區間的熒光波長可調的 CdTe 量子點，熒光光譜半峰寬約37~60 nm、峰形對稱。量子點儲藏半年後外量子效率仍達16.45%，髮光效率高。通過實驗建立量子點的OA和OR生長模型，探討和分析瞭CdTe量子點的生長規律。
재밀폐용기적수상중이과량적NaBH4보호합성적제원여이구기병산위은정제적력용액합성CdTe양자점，무수담기보호，간화료합성공예。합성적양품용투사전자현미경（TEM）대기형모진행표정。용흡수광보、형광광보、홍외광보연구기광보특정。고찰료17 mmol전구농도하적CdTe재불동조건획득적양자점적발광특정。시험결과표명：재감개중공제불동적반응시간가획득발사록광도홍광구간적형광파장가조적 CdTe 양자점，형광광보반봉관약37~60 nm、봉형대칭。양자점저장반년후외양자효솔잉체16.45%，발광효솔고。통과실험건립양자점적OA화OR생장모형，탐토화분석료CdTe양자점적생장규률。
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.
