文章信息/Info

Title:

Optical Properties and Research Progress of II-VI Quantum Dots Doped Glasses

作者:

夏夢(mèng)玲; 劉超; 趙修建; 韓建軍

硅酸鹽建筑材料國家重點(diǎn)實(shí)驗(yàn)室（武漢理工大學(xué)）

Author(s):

XIA Mengling;  LIU Chao*;  ZHAO Xiujian;  HAN Jianjun

(State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology), Wuhan 430070, China) 

關(guān)鍵詞:

II-VI族量子點(diǎn)摻雜玻璃; 熒光調(diào)控; 核殼結(jié)構(gòu)量子點(diǎn); 量子效率; 發(fā)光二極管（LED）

Keywords:

II-VI quantum dots (QDs) doped glasses;  photoluminescence modulation;  core-shell structural QDs;  quantum efficiency;  light emitting diode (LED)

DOI:

10.7502/j.issn.1674-3962.2017.07.07

文獻(xiàn)標(biāo)志碼:

A

摘要:

由于量子限域效應(yīng)，尺寸可調(diào)的II-VI族量子點(diǎn)摻雜玻璃在光學(xué)濾波片、非線性光學(xué)器件上的應(yīng)用已經(jīng)被廣泛研究。玻璃中量子點(diǎn)的光學(xué)性質(zhì)主要由量子點(diǎn)的尺寸、表面狀態(tài)和周圍基質(zhì)環(huán)境決定，通過提高Se/Cd比可以有效地對(duì)量子點(diǎn)的表面缺陷進(jìn)行鈍化，實(shí)現(xiàn)CdSe量子點(diǎn)的本征發(fā)光；進(jìn)一步調(diào)整熱處理制度可以促進(jìn)Zn離子擴(kuò)散進(jìn)入CdSe量子點(diǎn)表面，形成CdSe/Cd1-xZnxSe核殼結(jié)構(gòu)，使得缺陷發(fā)光幾乎完全猝滅，從而提高量子點(diǎn)的熒光量子效率；在玻璃中原位合成的CdS/ZnS核殼結(jié)構(gòu)量子點(diǎn)的熒光量子效率可達(dá)到53%。隨著基礎(chǔ)研究中玻璃中II-VI族量子點(diǎn)熒光效率的不斷提高，發(fā)光二極管（LED）等小型發(fā)光器件的制造成為可能。為了滿足實(shí)際需要，建立核殼結(jié)構(gòu)中量子點(diǎn)表面鈍化機(jī)理模型，進(jìn)一步優(yōu)化量子點(diǎn)熒光效率是下一步需要解決的問題。
 

Abstract:

Due to the quantum confinement effect, the glasses doped with size tunable II-VI quantum dots (QDs) have been widely investigated in the applications of optical filters and nonlinear optical devices. The optical properties of QDs in glasses mainly depend on the size, the surface states and the environment of the surrounding matrix of the QDs. The surface defects of CdSe QDs can be effectively passivated by increasing the Se/Cd ratio, realizing the intrinsic photoluminescence of CdSe QDs in glasses. By adjusting the heat-treatment condition, Zn ions can be incorporated into the surface of CdSe QDs and form CdSe/Cd1-xZnxSe core-shell structure, which almost quenched the defects emission and further improve the quantum efficiency. In addition, the quantum efficiency of CdS/ZnS core-shell structural QDs by situ synthesis in glasses even can reach 53%. The fabrication of light emitting diode (LED) and other small light emitting devices is becoming possible with the continuous improvement of the fluorescence efficiency of II-VI QDs doped glasses in fundamental study. To meet the practical needs, establishing the model of the surface passivation mechanism in the core-shell system and further improve the fluorescence efficiency of the QDs in glasses is the next work to be done.