Unknown

Dataset Information

0

Amorphous effect on the advancing of wide-range absorption and structural-phase transition in γ-In2Se3 polycrystalline layers.


ABSTRACT: The exploitation of potential functions in material is crucial in materials research. In this study, we demonstrate a III-VI chalcogenide, polycrystalline γ-In2Se3, which simultaneously possesses the capabilities of thickness-dependent optical gaps and wide-energy-range absorption existed in the polycrystalline layers of γ-In2Se3. Transmission electron microscopy and Raman measurement show a lot of γ-phase nanocrystals contained in the disordered and polycrystalline state of the chalcogenide with medium-range order (MRO). The MRO effects on the γ-In2Se3 layers show thickness-dependent absorption-edge shift and thickness-dependent resistivities. The amorphous effect of MRO also renders a structural-phase transition of γ → α occurred inside the γ-In2Se3 layer with a heat treatment of about 700 °C. Photo-voltage-current (Photo V-I) measurements of different-thickness γ-In2Se3 layers propose a wide-energy-range photoelectric conversion unit ranging from visible to ultraviolet (UV) may be achieved by stacking γ-In2Se3 layers in a staircase form containing dissimilar optical gaps.

SUBMITTER: Ho CH 

PROVIDER: S-EPMC3996461 | biostudies-other | 2014

REPOSITORIES: biostudies-other

Similar Datasets

| S-EPMC4371055 | biostudies-literature
| S-EPMC6180042 | biostudies-literature
| S-EPMC2944705 | biostudies-literature
| S-EPMC4338431 | biostudies-other
| S-EPMC7260362 | biostudies-literature
| S-EPMC7692450 | biostudies-literature
| S-EPMC5021940 | biostudies-literature
| S-EPMC7914868 | biostudies-literature
| S-EPMC7367344 | biostudies-literature
| S-EPMC8667042 | biostudies-literature