|本期目录/Table of Contents|

氮化物半导体量子点核-壳结构杂质态的结合能(PDF)

《内蒙古大学学报(自然科学版)》[ISSN:1000-9035/CN:22-1262/O4]

期数:
2019年06期
页码:
604-609
栏目:
研究论文
出版日期:
2019-11-15

文章信息/Info

Title:
Binding Energies of Impurity States in a Core-shell Structure of Nitride Semiconductor Quantum Dots
作者:
李 硕石 磊闫祖威
内蒙古农业大学理学院,呼和浩特 010018
Author(s):
LI ShuoSHI LeiYAN Zu-wei
College of Science,Inner Mongolia Agricultural University,Hohhot 010018,China
关键词:
球形量子点 杂质态 结合能
Keywords:
spherical quantum dot impurity state binding energy
分类号:
-
DOI:
-
文献标识码:
A
摘要:
在连续介电模型和有效质量近似下,采用变分法从理论上研究了GaN/AlxGa1-xN量子点核-壳结构中杂质态结合能,计算了该结构中杂质态结合能随量子点核-壳结构核尺寸、壳尺寸、Al组分以及杂质位置的变化关系.结果表明:杂质态结合能随着量子点半径(核和壳尺寸)的增加单调减小; 当杂质位置到量子点中心距离d增加时,杂质态结合能呈现先增大后减小的趋势,出现一极大值; 杂质态结合能随Al组分的变化受杂质位置影响较大,呈现不同的变化趋势,且变化比较明显.
Abstract:
The binding energies of impurity states in GaN/AlxGa1-xN quantum dot core-shell structures are studied theoretically by a variational method under the continuous dielectric model and the effective mass approximation.The dependence of the binding energies of impurity states on the core size,shell size,Al component and impurity location of the core-shell structure is calculated.The results show that the binding energies of impurity states decrease monotonically with increasing radius of the quantum dot (core and shell size).When the distance between the center of the quantum dot and the impurity position increases,the binding energies of the impurity states first increase and then decrease,and appear a maximum value.The binding energies of the impurity states are greatly affected by the location of the impurity with the change of the Al component,showing different trends,and the change is obvious.

参考文献/References

[1] Rossetti R,Nakahaha S,Brus L E.Quantum size effects in the redox potentials,resonance Raman spectra,and electronic spectra of CdS crystallites in aqueous solution[J].The Journal of Chemical Physics,1983,79(2):1086-1088.
[2] Vahdani M R K.Intersubband optical absorption coefficients and refractive index changes in a Parabolic cylinder quantum dot[J].Physics Letters A,2010,374(4):637-643.
[3] Triki M,Jaziri S.Electron-phonon interaction in CdS/ZnS quantum dot[J].Superlattice Microst,2005,37(6):365-372.
[4] 石磊,闫祖威.纤锌矿氮化物半导体椭球型量子点杂质[J].内蒙古大学学报:自然科学版,2009,40(2):162-166.
[5] 王艳驹,闫祖威.应变纤锌矿GaN/AlxGa1-xN量子点中杂质态结合能及其压力效应[J].内蒙古大学学报:自然科学版,2010,41(6):0649-0654.
[6] 张文强,闫祖威.纤锌矿GaN/AlxGa1-xN应变柱形量子点中杂质态结合能及其压力效应[J].发光学报,2011,32(2):0115-0121.
[7] 赵翠兰,丁朝华,肖景林.柱形量子点中极化子的重整化质量[J].发光学报,2005,26(2):159-162.
[8] Wu Renglai,Xiao Shifa,Xue Hongjie,et al.Quantization of plasmon in two-dimensional square quantum dot syste[J].Acta Phys Sin,2017,66(22):227301-1-7.
[9] 黄晓亚,王新练.杂质对方形量子点基态能和束缚能的影响[J].量子电子学报,2017,34(01):113-116.
[10] Fang Yinan,Xiao Meng,Yao Duanzheng.Quantum size dependent optical nutation in CdSe/ZnS/CdSe quantum dot quantum well[J].Physica E,2010,42(9):2178-2183.
[11] Ibral A,Zouitine A,Dujardin F,et al.Binding energy and spatial extension of an off-centre donor impurity in ZnS/CdSe spherical core/shell nanostructures[J].Journal of Optoelectronics and Advanced Materials,2015,17(1-2):151-159.
[12] Feng Zhen-Yu ,Yan Zu-Wei.Polaron effect on the optical rectification in spherical quantum dots with electric field[J].Chinese Physics B,2016,25(10):107804-1-6.
[13] Shi L,Yan Z W.Linear and nonlinear optical properties of an off-center donor in GaAs/AlGaAs and AlGaAs/GaAs core-shell ellipsoidalquantum dots[J].Superlattices and Microstructures,2017,109:382-393.
[14] Shi L,Yan Z W .Electric field and shape effect on the linear and nonlinear optical properties of multi-shell ellipsoidal quantum dots[J].Superlattices and Microstructures,2016,94:204-214.
[15] Shi Lei,Yan Zuwei .Effects of electric field and shape on the ellipsoidal finite-potential quantum dot[J].Journal of Applied Physics,2011,110(2):024306-1-10.
[16] 曹艳娟,闫祖威,石磊.导带弯曲对有限深GaN/AlxGa1-xN球型量子点中束缚极化子的影响及压力效应[J].发光学报.2013,34(09):1137-1113.
[17] Kirak M,Altinok Y,Yilmaz S.The effects of the hydrostatic pressure and the temperature on binding energy and optical properties of a donor impruity in a spherical quantem dot under external electric field[J].Journal of Luminescence,2013,136:415-421.
[18] 张冬,闫祖威.应变 GaN/ Alx Ga1-x N柱形量子点中杂质态的结合能[J].内蒙古大学学报:自然科学版,2010,41(3):0289-0296.
[19] Talbi A,Feddi E,Zouitine A,et al.Control of the binding energy by tuning the single dopant position,magnetic field strength and shell thickness in ZnS/CdSe cor

备注/Memo

备注/Memo:
收稿日期:2019-03-22; 修回日期:2019-06-18
基金项目:国家自然科学基金资助项目(11364028,11664030); 内蒙古自然科学基金重大项目(2013ZD02)资助; 内蒙古"草原英才"工程资助项目
作者简介:李 硕(1991-),男,河北保定人,2017级硕士研究生.主要从事凝聚态理论的研究.
通信作者:闫祖威(1960-),男,内蒙古呼和浩特人,教授,博士.E-mail:zwyan@imau.edu.cn
更新日期/Last Update: