ZnSe

基本信息

ZnSe是一种浅黄色二元固体化合物,在自然界中很少出现。它可以制成六方和立方晶体结构。硒化锌用作发光二极管和二极管激光器中的蓝色光源。还用作红外激光增益介质和红外光学材料。用碲激活的 ZnSe 在 X 射线和伽马射线探测器中用作闪烁体。 [9]

晶体结构

  Fractional Coordinates Orthogonal Coordinates
  Label Elmt x y z xor[Å] yor[Å] zor[Å]
1. T2 Se 0.2500 0.2500 0.2500 -0.863 -1.331 -1.873
2. T2 Se 0.2500 0.7500 0.7500 0.100 -3.980 -4.722
3. T2 Se 0.7500 0.7500 0.2500 -2.657 -1.164 -5.453
4. T2 Se 0.7500 0.2500 0.7500 -3.482 -4.171 -2.935
5. T1 Zn 0.0000 0.0000 0.0000 0.000 0.000 -0.000
6. T1 Zn 0.0000 0.5000 0.5000 0.963 -2.649 -2.849
7. T1 Zn 0.5000 0.5000 0.0000 -1.794 0.167 -3.580
8. T1 Zn 0.5000 0.0000 0.5000 -2.620 -2.841 -1.063
9. T1 Zn 1.0000 0.0000 0.0000 -5.376 -0.025 -1.793
10. T1 Zn 1.0000 0.5000 0.5000 -4.414 -2.674 -4.642
11. T1 Zn 0.0000 1.0000 0.0000 1.788 0.358 -5.366
12. T1 Zn 0.5000 1.0000 0.5000 -0.831 -2.482 -6.429
13. T1 Zn 1.0000 1.0000 0.0000 -3.588 0.333 -7.159
14. T1 Zn 0.0000 0.0000 1.0000 0.137 -5.656 -0.332
15. T1 Zn 0.5000 0.5000 1.0000 -1.657 -5.490 -3.912
16. T1 Zn 1.0000 0.0000 1.0000 -5.239 -5.681 -2.125
17. T1 Zn 0.0000 1.0000 1.0000 1.925 -5.298 -5.698
18. T1 Zn 1.0000 1.0000 1.0000 -3.451 -5.323 -7.491

使用 Cu Kα 单色源的理论衍射数据。

(m是多重数,N是最大弯曲次数)

ref no. h k l d(hkl) 2-Theta Intensity I/Imax m N
[ 1] 1 1 1 3.27219 27.2296 3.56799e-001 100.0 8 3
[ 2] 0 0 2 2.83380 31.5438 1.03393e-003 0.3 6 4
[ 3] 0 2 2 2.00380 45.2123 2.62259e-001 73.5 12 8
[ 4] 1 1 3 1.70885 53.5827 1.57080e-001 44.0 24 11
[ 5] 2 2 2 1.63610 56.1706 3.14514e-004 0.1 8 12
[ 6] 0 0 4 1.41690 65.8603 4.10933e-002 11.5 6 16
[ 7] 1 3 3 1.30024 72.6539 6.12994e-002 17.2 24 19
[ 8] 0 2 4 1.26731 74.8585 6.43795e-004 0.2 24 20
[ 9] 2 2 4 1.15689 83.4861 8.34838e-002 23.4 24 24
[ 10] 1 1 5 1.09073 89.8496 4.77530e-002 13.4 32 27
[ 11] 0 4 4 1.00190 100.4906 3.01446e-002 8.4 12 32

300 K 时的基本参数

ZnSe薄膜主要通过分子束外延、化学气相沉积、化学气相沉积和真空蒸发等方法制备。电沉积是一种简单、低成本且可行的生产优质薄膜的方法。1

通过化学气相沉积制备的ZeSe薄膜的缓冲层总面积效率高达9.6%(AM 1.5照明下),开路电压为482 mV,短路电流为31.0 mA/cm2,填充因子达到64%。 2

Basic Parameters at 300 K

Crystal structure: Sphalerite 3
Group of symmetry: F-43m 3
Number of atoms in 1 cm3: 4.39*1026 3
Unit cell volume: 182.05 Å3 3
Atoms per unit cell: 8 3
Debye temperature: 339(2) K 4
Density: 5.266 g/cm3 3
Dielectric constant (static): 8.6 5
Dielectric constant (high frequency): 5.7 5
Effective electron masses: (0.16 ± 0.01)me 6
Effective hole masses: 0.75 mo 4
Lattice constant: a = 5.667 Å 3
Optical phonon energy (longitudinal): 0.0314 eV 7
Conductivity: n-type 6

温度依赖性

电子浓度与温度的关系图可以在此找到 M. Aven, High Electron Mobility in Zinc Selenide Through Low Temperature Annealing. J. Appl. Phys. 42, 1204 (1971); doi: 10.1063/1.1660167  7

施主和受主

            施主:                Al, Cl, Ga, In, F, Br                                                                            6,8

            受主:            Cu, Ag, Sb                                                                                         8

浅层施主的电离能                                            4

Ed(LiI)                                                15(1) meV     T= 4.2 K                 

Ed(NaI)                                              16(1) meV

Ed(Al)                                                 26.3 meV

Ed(Ga)                                               27 meV

Ed(In)                                                 28.1 meV

Ed(F)                                                  29.3 meV

Ed(Cl)                                                26.1 meV

Ed(I)                                                  30.4 meV

浅层受主的电离能

Ea(Li)                                                118(2) meV   T = 4.2 K

Ea(Na)                                              98(2) meV

Ea(K)                                                94(2) meV

Ea(N)                                                112 meV    T = 4.2 K

Ea(P)                                                 80…92 meV   T = 4.2 K

Ea(As)                                              125 meV    T = 77 K

Ea(Sb)                                              69 meV    T = 30 K

Ea(Rb)                                              89(2) meV    T = 4.2 K

Ea(Cs)                                              74(2) meV

Ea(O)                                                80 meV    T = 4 K

Ea(VZn)                                            218 meV    T = 4 K

 

电气特性

        电性能基本参数

                Energy gap:                                                                   2.81 eV                                                                 1                                   

Energy spin-orbital splitting:      ∆08v- Γ7v)          0.42 eV                      T=295 K                            4

                                                         ∆14,5v- Γ6v)       0.20 eV                      T=300 K                            4

Donor  concentration:                                                 1016 cm-3                                                              7                         

Carrier mobility:                                                    μn = up to 400 cm2/Vs     T=300K                             4

                                                                                μp = 110 cm2/Vs                T=300K                              4

Intrinsic resistivity:                                                        ~1012  Ω cm                                                          9         

  流动性和霍尔效应

               

                Hall mobility:                                                                     530 cm2/ V*s (T=300 K)                  9         

                                                                                                            12,000 cm2/ V*s (T=60 K)               9

               Absorption coefficient:                                                     104 cm-1                                              1    

  

               迁移率和迁移率比以及电子霍尔迁移率与温度的关系图可以在以下位置找到:

               M. Aven, High Electron Mobility in Zinc Selenide Through Low Temperature Annealing. J. Appl. Phys. 42, 1204 (1971); doi: 10.1063/1.1660167 7

光学特性

折射率:折射率和吸收指数与光子能量的关系图可在 4中找到

热性能

线热膨胀系数:                         α = 7.4*10-6 K-1                             4

热容:                                                                    Cp = 51.88 J/Mol*K                          4

导热系数                                                           κ = 0.19 W K-1 cm-1 T=300K       4

硒化锌的热特性图可在 4中找到

机械性能、弹性常数、晶格振动

        基本参数

                Bulk modulus:                                                   62.4(7) GPa                         4                         

                Density:                                                               5.266 g/cm3                        4                                                         

                                                          

        弹性常数

                Elastic Constants:                                             C11 = 90.3(19) GPa            4

                                                                                                C12 = 53.6(23) Gpa           4

                                                                                                C44 = 39.4(12) Gpa            4

                    

声子频率

            VLO(Γ)                           7.59 THz          T=300 K                       4

            VTO(Γ)                           6.39 THz          T=300 K                      

声子能量

HvLO1)                        30.99 meV                                           4

HvTO15)                      25.17 meV                                          

HvLA(Γ)                         19.8 meV                                            

HvTA(Γ)                         8.0 meV                                              

HvLO(X)                         27.64 meV                                          

HvTO                               25.54 meV                                          

HvLA                              23.55 meV                                          

HvLO(L)                         27.77 meV                                          

HvTO                               25.54 meV                                          

Hv(W3)                          24.9 meV                                            

Hv(W1)                         18.59 meV                                          

Hv(W’2)                        11.53 meV                                          

Hv(W”2)                       26.53. meV                                         

Hv(W’4)                        14.26 meV                                          

Hv(W”4)                       24.61 meV                                          

 

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