Memetic Algorithm Optimization of Thin-film Photonic Structures for Thermal and Energy Applications

2018 ◽  
Author(s):  
Yu Shi ◽  
Wei Li ◽  
Aaswath Raman ◽  
Shanhui Fan
Keyword(s):  
Thin Film ◽  
Memetic Algorithm ◽  
Algorithm Optimization ◽  
Energy Applications ◽  
Photonic Structures

Optical and structural properties of thin film amorphous oxides for photonic structures

2020 ◽  
Author(s):  
Kestutis Juskevicius ◽  
Emmett Randel ◽  
Le Yang ◽  
Mariana Fazio ◽  
Aaron Davenport ◽  
...  
Keyword(s):  
Thin Film ◽  
Structural Properties ◽  
Amorphous Oxides ◽  
Photonic Structures

Development of the Structural, Optical, and Electrical Properties of PEDOT:PSS Conducting Polymer Thin Film for Energy Applications

2021 ◽  
Vol 902 ◽  
pp. 65-70
Author(s):  
Samar Aboulhadeed ◽  
Mohsen Ghali ◽  
Mohamad M. Ayad
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Conducting Polymer ◽  
Film Surface ◽  
Volume Ratio ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Optical And Electrical Properties ◽  
Energy Applications

We report on a development of the structural, optical and electrical properties of poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) conducting polymer thin films. The PEDOT:PSS thin films were deposited by a controlled thin film applicator and their physical properties were found to be effectively modified by isopropanol. The deposited films were investigated by several techniques including XRD, UV–Vis, SPM and Hall-effect. Interestingly, by optimizing the PEDOTS:PSS/ISO volume ratio (v:v), we find that the film charge carriers type can be switched from p to n-type with a high bulk carriers concentration reaching 6×1017 cm-3. Moreover, the film surface roughness becomes smoother and reaching a small value of only 1.9 nm. Such development of the PEDOT:PSS film properties makes it very promising to act as an electron transport layer for different energy applications.

Electrochemical Pulsing Deposition of CTZS (Optical and Structural properties) Solar Energy Applications

2018 ◽  
Vol MA2018-01 (31) ◽  
pp. 1927-1927
Author(s):  
Mahfouz Ali Saeed
Keyword(s):  
Thin Film ◽  
Supporting Electrolyte ◽  
Rotating Disk ◽  
Xrd Analysis ◽  
Atomic Ratio ◽  
Rotating Disk Electrode ◽  
Energy Applications ◽  
Behavior Study ◽  
Wide Range ◽  
Steady State Current

Cu2(ZnSn)(S)4 (CTZS) has number of advantages over other solar this film such as CuInGaSe2 (CIGS) due to its higher band gap. Generating such thin film layers by electrochemical methods is particularly attractive because the lower generating budget and the higher throughput. According to literature it is default with many challenges to produce CTZS from electrodeposition methods due to wide range of standard potential of each elements of CTZS 1-4. Sulfur atomic ratio is about 50% of CTZS alloy which add more complexity to electrochemical processing. We introduce in this work electropulsing techniques on order to electroplate at transient current instead of steady state current. Electrolyte composition was similar to dilute concentration from the previous work which is is considerably more dilute in comparison to conventional electrolytes used in the literature1-4. The bath composition is: 0.0042 M CuSO4, 0.0031 M ZnSO4, 0.035 M SnCl2, 0.005 M Na2S2O3, and 0.045 M Na2S2O3. PHydrion is used to buffer the electrolyte to pH=2, and supporting electrolyte is 0.6 M LiCl. Experiments was conducted at a rotating disk electrode which offers measureable characterization of the rotating flow at room temperature. Electrochemical pulsing current behavior study at different off and on time and current in Fig. 1 and 2. The effects of pulsing time and current density on the CTZS thin film adhesion and atomic composition are discussed. The annealing was carried out on tube furnace under sulfur element atmosphere with no extra material addition. The amount of sulfur on the absorber layer was optimized. The alloy composition was examined using Energy-dispersive X-ray spectroscopy technique (EDS) Fig. 2. XRD analysis method used to characterized CTZS thickness and crystallography. Figure 1

scholarly journals Self-driving laboratory for accelerated discovery of thin-film materials

2020 ◽  
Vol 6 (20) ◽  
pp. eaaz8867 ◽  
Author(s):  
B. P. MacLeod ◽  
F. G. L. Parlane ◽  
T. D. Morrissey ◽  
F. Häse ◽  
L. M. Roch ◽  
...  
Keyword(s):  
Thin Film ◽  
Materials Science ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Clean Energy ◽  
Research Process ◽  
Hole Transport ◽  
Inorganic Materials ◽  
Consumer Electronics ◽  
Energy Applications

Discovering and optimizing commercially viable materials for clean energy applications typically takes more than a decade. Self-driving laboratories that iteratively design, execute, and learn from materials science experiments in a fully autonomous loop present an opportunity to accelerate this research process. We report here a modular robotic platform driven by a model-based optimization algorithm capable of autonomously optimizing the optical and electronic properties of thin-film materials by modifying the film composition and processing conditions. We demonstrate the power of this platform by using it to maximize the hole mobility of organic hole transport materials commonly used in perovskite solar cells and consumer electronics. This demonstration highlights the possibilities of using autonomous laboratories to discover organic and inorganic materials relevant to materials sciences and clean energy technologies.

Quasi-crystal photonic structures for fullband absorption enhancement in thin film silicon solar cells

2018 ◽  
Vol 175 ◽  
pp. 41-46 ◽  
Author(s):  
Peizhuan Chen ◽  
Pingjuan Niu ◽  
Liyuan Yu ◽  
Jianjun zhang ◽  
Qihua Fan ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Absorption Enhancement ◽  
Silicon Solar Cells ◽  
Photonic Structures ◽  
Thin Film Silicon

scholarly journals Comparative Study of Radiative Heating Techniques for Fast Processing of Functional Coatings for Sustainable Energy Applications

2021 ◽  
Author(s):  
Rebecca Griffin ◽  
Katherine Hooper ◽  
Cecile Charbonneau ◽  
Jenny Baker
Keyword(s):  
Thin Film ◽  
Chemical Reactions ◽  
Short Wavelength ◽  
Near Infrared ◽  
Radiative Heating ◽  
Intense Pulse Light ◽  
Functional Coatings ◽  
Binder Removal ◽  
Energy Applications ◽  
Fast Processing

This study assesses the use of short wavelength radiative heating techniques such as near infrared, intense pulse light and ultraviolet heating for processing coatings in energy applications. Concentrating on the importance of investigating different radiative wavelengths to advance these technologies as scalable processes via reduced heating times. It illustrates the mechanisms by which these techniques can transform thin film materials: sintering, binder removal, drying and chemical reactions. It focuses on successful research applications and the methods used to apply these radiative mechanisms in solar energy, battery storage and fuel cells, whilst considering the materials suitable for such intentions. The purpose of this paper is to highlight to academics as well as industrialists some of the potential advantages and applications of radiative heating technologies.

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