Optical properties of orthorhombic germanium selenide: an anisotropic layered semiconductor promising for optoelectronic applications

2021 ◽  
Author(s):  
Agata Karolina Tołłoczko ◽  
Szymon J. Zelewski ◽  
Michał Błaszczak ◽  
Tomasz Woźniak ◽  
Anna Siudzińska ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Van Der Waals ◽  
Group Iv ◽  
Black Phosphorus ◽  
Layered Semiconductor ◽  
Germanium Selenide ◽  
Optoelectronic Applications ◽  
High Optical Absorption

Group-IV monochalcogenides, such as germanium selenide (GeSe) are strongly anisotropic semiconducting van der Waals crystals isoelectronic to black phosphorus, with superior stability in air conditions. High optical absorption, good conductivity,...

Interface effect on electronic and optical properties of antimonene/GaAs van der Waals heterostructures

2017 ◽  
Vol 5 (37) ◽  
pp. 9687-9693 ◽  
Author(s):  
Ning Wang ◽  
Dan Cao ◽  
Jun Wang ◽  
Pei Liang ◽  
Xiaoshuang Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Van Der Waals ◽  
Band Alignment ◽  
Optical Absorption Coefficient ◽  
Type Ii ◽  
Van Der Waals Heterostructures ◽  
Visible Light Range ◽  
High Optical Absorption ◽  
High Optical Absorption Coefficient

Antimonene/GaAs van der Waals heterostructures exhibit a type-II band alignment and a high optical absorption coefficient in the visible-light range.

Modulation of the band structures and optical properties of holey C2N nanosheets by alloying with group IV and V elements

2016 ◽  
Vol 4 (39) ◽  
pp. 9294-9302 ◽  
Author(s):  
Juan Du ◽  
Congxin Xia ◽  
Tianxing Wang ◽  
Wenqi Xiong ◽  
Jingbo Li
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Band Gap ◽  
Group Iv ◽  
Band Structures ◽  
Alloy Concentration

The band gap and optical absorption can be tuned effectively by the alloy concentration x in the C2N1−xPx and C2N1−xAsx alloys.

scholarly journals Morphological Modification and Analysis of ZnO Nanorods and Their Optical Properties and Polarization

Scanning ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Nandang Mufti ◽  
Siti Maryam ◽  
Anggun A. Fibriyanti ◽  
Robi Kurniawan ◽  
Abdulloh Fuad ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
High Performance ◽  
Zno Nanorods ◽  
High Concentration ◽  
Zinc Interstitial ◽  
Morphological Modification ◽  
Polarization Characteristics ◽  
High Optical Absorption ◽  
Insight Into

We report on the effect of the morphological modification on optical properties and polarization of ZnO nanorods (NR). Here, the morphology and structure of the ZnO NR were modified by introducing different annealing temperatures. The increase of length and diameter and change in density of the ZnO NR were clearly observed by increasing the annealing temperature. We found that the samples show different oxygen vacancy (VO) and zinc interstitial (ZnI) concentrations. We suggest that the different concentrations of VO and ZnI are originated from morphological and structural modification. Our results reveal that optical absorption and polarization of ZnO NR could be enhanced by producing a high concentration of VO and ZnI. The modification of VO and ZnI promotes a decrease in the band gap and coexistence of high optical absorption and polarization in our ZnO NR. Our findings would give a broad insight into the morphological modification and characterization technique on ZnO NR. The high optical and polarization characteristics of ZnO NR are potential for developing the high-performance nanogenerator device for multitype energy harvesting.

Optical Properties of Sputtered Silver Granular Films

2005 ◽  
Vol 480-481 ◽  
pp. 287-292 ◽  
Author(s):  
S.E. Paje ◽  
F. Teran ◽  
J.M. Riveiro ◽  
J. Llopis ◽  
M.A. García ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Optical Properties ◽  
Optical Absorption ◽  
Surface Morphology ◽  
Silver Clusters ◽  
Plasmon Excitation ◽  
Granular Films ◽  
Silver Films ◽  
Atomic Force ◽  
Atomic Force Micrographs

In this research we study optical absorption and morphology of silver films prepared with a sputtering method. Silver granular films are obtained on a glass substrate for films with thickness smaller than about 60 Å. Superficial silver clusters of around 100 nm in diameter are clearly seen in the atomic force micrographs. The absorption of these samples are characterized by plasmon excitation in the 450-650 nm spectral range, which differs from the known excitation of silver nanoparticles fabricated by different techniques. The optical absorption of silver granular films depend on sputtering conditions like substrate temperature or deposition rate and correlates with the surface morphology.

A first-principles study on the electronic and optical properties of a type-II C2N/g-ZnO van der Waals heterostructure

2021 ◽  
Vol 23 (6) ◽  
pp. 3963-3973
Author(s):  
Jianxun Song ◽  
Hua Zheng ◽  
Minxia Liu ◽  
Geng Zhang ◽  
Dongxiong Ling ◽  
...  
Keyword(s):  
Optical Properties ◽  
Dft Calculations ◽  
First Principles ◽  
Van Der Waals ◽  
Band Alignment ◽  
Type Ii ◽  
Electronic And Optical Properties ◽  
Direct Bandgap ◽  
Van Der Waals Heterostructure ◽  
Vdw Heterostructure

The structural, electronic and optical properties of a new vdW heterostructure, C2N/g-ZnO, with an intrinsic type-II band alignment and a direct bandgap of 0.89 eV at the Γ point are extensively studied by DFT calculations.

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