1. Purification by sublimation

2. Synthesis

3. Sublimation or chemical vapor transport

Crystal growth by vapor transport

Sourcematerial

Crystal

TCTS

Temperature

V » 1-10 mm/day

Growthe.g. DT = 3KNucleation

e.g. DT = 10KSublimation

T = source temperatureST = crystal temperatureCDT = T - TS C

Len

gth

1E-3 0.01 0.1 1

1E-4

1E-3

0.01

Vm

ax(m

m/h

)

Partial argon pressure (atm)

Cd: 290 °C

Zn: 420 °C

Mg: 590 °C

Cd

Zn

Mg

0.5 mm

0.5 mm

Raman spectra of ZnSe crystals withdifferent isotope composition

Nor

mal

ized

in

ten

sity

[ar

b. U

nit

s]

LC Raman Shift [cm ]-1

Zn Se

Zn Se

Zn Se

Zn Se

Zn Se

Zn Se

64 80

nat nat

68 76

dis 80

68 dis

68 80

64 76Zn Se

ZnO, ZnSe, ZnTe, CdS, CdSe, Ag S, CuCl, CuBr,2

CuI, AgI, TiO , C , C ,2 60 70

Zn, Cd, Mg etc.

Crystals grown:

KBr GeS TlBr

A view of vapor growth equipment

64 76Zn Se

ZnSe, ZnTe, CdS

10 mm

64 18Zn O