Bandgap tuning of photonic crystals on III-V nitride thin films

2009 ◽  
Author(s):  
H. Yalamanchili ◽  
L. A. Hornak ◽  
D. Korakakis ◽  
J. M. Dawson
Keyword(s):  
Thin Films ◽  
Photonic Crystals ◽  
Bandgap Tuning

One-dimensional photonic crystals of inhomogeneous thin films: band structure of rugate filters

2005 ◽  
Vol 244 (1-6) ◽  
pp. 259-267 ◽  
Author(s):  
F. Aguayo-Ríos ◽  
F. Villa-Villa ◽  
J.A. Gaspar-Armenta
Keyword(s):  
Thin Films ◽  
Photonic Crystals ◽  
Band Structure ◽  
One Dimensional

scholarly journals Reshaping Hybrid Perovskites Emission with Flexible Polymer Microcavities

2020 ◽  
Vol 230 ◽  
pp. 00006
Author(s):  
Paola Lova ◽  
Paolo Giusto ◽  
Francesco Di Stasio ◽  
Giovanni Manfredi ◽  
Giuseppe M. Paternò ◽  
...  
Keyword(s):  
Thin Films ◽  
Photonic Crystals ◽  
Low Cost ◽  
Scale Production ◽  
Large Area ◽  
Light Emitting Devices ◽  
Flexible Polymer ◽  
Hybrid Perovskite ◽  
Wide Range ◽  
Solution Processable

Thanks to versatile optoelectronic properties solution processable perovskites have attracted increasing interest as active materials in photovoltaic and light emitting devices. However, the deposition of perovskite thin films necessitates wide range solvents that are incompatible with many other solution-processable media, including polymers that are usually dissolved by the perovskite solvents. In this work, we demonstrate that hybrid perovskite thin films can be coupled with all polymer planar photonic crystals with different approaches to achieve emission intensity enhancement and reshaping using different approaches. The possibility to control and modify the emission spectrum of a solution processable perovskite via a simple spun-cast polymer structure is indeed of great interest in optoelectronic applications requiring high color purity or emission directionality. Furthermore, thanks to the ease of fabrication and scalability of solution-processed photonic crystals, this approach could enable industrial scale production of low-cost, large area, lightweight and flexible polymer-perovskite lighting devices, which may be tuned without resorting to compositional engineering.

Tunable ferroelectric photonic crystals based on Ba 0.7 Sr 0.3 TiO 3 /MgO multilayer thin films

2007 ◽  
Author(s):  
D. Y. Wang ◽  
K. L. Jim ◽  
C. W. Leung ◽  
H. L. W. Chan ◽  
C. L. Choy
Keyword(s):  
Thin Films ◽  
Photonic Crystals ◽  
Multilayer Thin Films

scholarly journals Texture and Bandgap Tuning of Phase Pure Cu2O Thin Films Grown By a Simple Potentiostatic Electrodeposition Technique

2020 ◽  
Author(s):  
Farhad Syed
Keyword(s):  
Thin Films ◽  
Texture Coefficient ◽  
Domain Size ◽  
Photoelectrochemical Cell ◽  
Electrodeposition Technique ◽  
Zero Bias ◽  
Potentiostatic Electrodeposition ◽  
Phase Pure ◽  
Cu2o Thin Films ◽  
Bandgap Tuning

Highly textured phase pure Cu2O thin films have been grown by a simple electrodeposition technique with varying deposition voltages (-0.3 to -1.0 V). The surface morphology characterized by Scanning Electron Microscopy (SEM) revealed that the deposited thin films coherently carpet the underlying substrate and composed of sharp faceted well-define grains of 0.5 – 1.0 µm sizes. XRD analyses showed that all films are composed of polycrystalline cubic Cu2O phase only and have average crystalline domain size in the range 30 – 73 nm. The preferred crystalline orientation of phase pure Cu2O films were found to be changing from (200) to (111) with increasing cathodic voltages and showed highest (111) and (200) crystalline texture coefficient while grown at -1.0 and -0.8 V respectively. Optical bandgap of the as-grown samples were calculated in the range (1.95 – 2.20) eV using UV-Vis Transmission data. The performance of copper oxide films was tested by estimating LED 'ON/OFF' modulated surface photovoltage into a photoelectrochemical cell at a zero bias.

scholarly journals Texture and Bandgap Tuning of Phase Pure Cu2o Thin Films Grown By a Simple Potentiostatic Electrodeposition Technique

2020 ◽  
Vol MA2020-01 (19) ◽  
pp. 1212-1212 ◽  
Author(s):  
Syed Farid Uddin Farhad ◽  
Mohammad Moazzem Hossain ◽  
Nazmul Islam Tanvir ◽  
Suravi Islam
Keyword(s):  
Thin Films ◽  
Electrodeposition Technique ◽  
Potentiostatic Electrodeposition ◽  
Phase Pure ◽  
Cu2o Thin Films ◽  
Bandgap Tuning
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