journal article

Journal Article

Text

Journal of Applied Physics. 2016, 120(15), p. 155301

Nanocrystal growth and morphology of PbTeSe-ZnSe composite thin films prepared by one-step synthesis method

American Institute of Physics

English

Text

2016-10-21

https://doi.org/10.1063/1.4964874

Kazuhisa Sato and Seishi Abe, "Nanocrystal growth and morphology of PbTeSe-ZnSe composite thin films prepared by one-step synthesis method", Journal of Applied Physics 120, 155301 (2016) https://doi.org/10.1063/1.4964874

The microstructure of polycrystalline PbTe₁₋ₓSeₓ-ZnSe composite thin films has been studied by scanning transmission electron microscopy and electron diffraction. The films were prepared by the one-step synthesis method using simultaneous evaporation of PbTe and ZnSe. The nanocrystals of PbTe₁₋ₓSeₓ are formed in a ZnSe matrix. Tellurium concentration can be tuned by controlling the PbTe evaporation source temperatures between 753 K and 793 K. Binary PbSe nanocrystals were formed at 753 K, while ternary PbTe₁₋ₓSeₓ nanocrystals were formed at 793 K. The nanocrystals grow in a granular shape at the initial stage of film growth, and the morphology changes to nanowire-shape as the film grows, irrespective of the Te concentration. The ternary PbTe₁₋ₓSeₓ nanocrystals were composed of two phases with different Te concentration; Te-rich (Se-poor) granular crystals were formed near the bottom half parts of the film and Te-poor (Se-rich) nanowires were formed at the upper half parts of the film. Columnar ZnSe crystals contain high-density {111} stacking faults due to the low stacking fault energy of ZnSe. A balance of deposition and re-evaporation on the substrate during the film growth will be responsible for the resultant nanocrystal morphology.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Kazuhisa Sato and Seishi Abe, "Nanocrystal growth and morphology of PbTeSe-ZnSe composite thin films prepared by one-step synthesis method", Journal of Applied Physics 120, 155301 (2016) and may be found at https://doi.org/10.1063/1.4964874.

89409

Nanocrystal growth and morphology of PbTeSe-ZnSe composite thin films prepared by one-step synthesis method

American Institute of Physics

English

2016-10-21

Journal of Applied Physics

120

15

155301

https://doi.org/10.1063/1.4964874

https://hdl.handle.net/11094/89409