scholarly journals Fluorescence Switchable Conjugated Polymer Microdisk Arrays by Cosolvent Vapor Annealing

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 269
Author(s):  
Hiroshi Yamagishi ◽  
Tokiya Matsui ◽  
Yusuke Kitayama ◽  
Yusuke Aikyo ◽  
Liang Tong ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Fluorescent Dyes ◽  
Quartz Substrate ◽  
Substrate Surface ◽  
Regular Array ◽  
Light Emitters ◽  
Organic Vapor ◽  
Vapor Annealing ◽  
Display Technology ◽  
Energy Consuming

Depositing minute light emitters into a regular array is a basic but essential technique in display technology. However, conventional lithographic methodologies involve multistep and energy-consuming processes. Here, we develop a facile method in which organic and polymeric fluorescent dyes spontaneously aggregate to form a patterned microarray. We find that a thin film of fluorescent π-conjugated polymer transforms into micrometer-sized aggregates when exposed to binary organic vapor at ambient temperature. The arrayed microaggregates can be formed over the whole substrate surface when using a quartz substrate that is prepatterned with regular hydrophilic boxes and hydrophobic grids. The resultant microarray is applicable to optical memories and displays when photoswitchable fluorophores are doped into the polymer matrix.

Highly efficient perovskite solar cells based on a dopant-free conjugated DPP polymer hole transport layer: influence of solvent vapor annealing

2018 ◽  
Vol 2 (10) ◽  
pp. 2154-2159 ◽  
Author(s):  
Xing Guo ◽  
Bingjuan Zhang ◽  
Zhenhua Lin ◽  
Jie Su ◽  
Zhou Yang ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Solvent Vapor ◽  
Vapor Annealing ◽  
Solvent Vapor Annealing ◽  
Influence Of Solvent

The solvent vapor annealing effect on conjugated polymer thin films as well as the corresponding perovskite solar cell devices is investigated.

scholarly journals P3HT Nanofibrils Thin-Film Transistors by Adsorbing Deposition in Suspension

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3643 ◽  
Author(s):  
Shuichi Nagamatsu ◽  
Masataka Ishida ◽  
Shougo Miyajima ◽  
Shyam S. Pandey
Keyword(s):  
Thin Film ◽  
Conjugated Polymer ◽  
Thin Film Transistors ◽  
Preparation Method ◽  
Substrate Surface ◽  
Thin Film Transistor ◽  
Current Ratio ◽  
P3ht Film ◽  
Polymer Thin Film ◽  
Film Preparation

A novel film preparation method utilizing polymer suspension, entitled adsorbing deposition in suspensions (ADS), has been proposed. The poly(3-hexylthiophene) (P3HT) toluene solution forms P3HT nanofibrils dispersed suspension by aging. P3HT nanofibrils are highly crystallized with sharp vibronic absorption spectra. By the ADS method, only P3HT nanofibrils in suspension can be deposited on the substrate surface without any disordered fraction from the dissolved P3HT in suspension. Formed ADS film contains only the nanostructured conjugated polymer. Fabricated polymer thin-film transistor (TFT) utilizing ADS P3HT film shows good TFT performances with low off current, narrow subthreshold swing and large on/off current ratio.

Integrated 1060nm MOPA pump source for high-power green light emitters in display technology

2008 ◽  
Author(s):  
O. Brox ◽  
J. Wiedmann ◽  
F. Scholz ◽  
F. Bugge ◽  
J. Fricke ◽  
...  
Keyword(s):  
High Power ◽  
Green Light ◽  
Light Emitters ◽  
Pump Source ◽  
Display Technology

Effect of Annealing on Laser-Ablated K3Li2-xNb5+xO15+2x Thin Films

2008 ◽  
Vol 368-372 ◽  
pp. 302-304
Author(s):  
Zu Sheng Zhan ◽  
Yan Sheng Gong ◽  
Chuan Bin Wang ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Thin Films ◽  
Quartz Substrate ◽  
Substrate Surface ◽  
Visible Range ◽  
Deposition Condition ◽  
Sintered Ceramic ◽  
Post Annealing ◽  
Average Transmittance

In this study, K3Li2-xNb5+xO15+2x (KLN) thin films were prepared by laser-ablated a sintered ceramic target. For an optimum deposition condition, in-situ post annealing method was employed on as-deposited films. XRD measurements showed that KLN films with (310) preferred orientation were obtained on fused quartz substrate. Surface morphology studies indicated that in-situ post annealing could improve the surface quality of KLN thin films. The average transmittance of as-deposited and annealed films in the visible range was nearly 80% to 90%.

scholarly journals Effect of Si and SiO2Substrates on the Geometries of As-Grown Carbon Coils

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Semi Park ◽  
Sung-Hoon Kim ◽  
Tae-Gyu Kim
Keyword(s):  
Thin Film ◽  
Thermal Expansion ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Quartz Substrate ◽  
Substrate Surface ◽  
Chemical Vapor ◽  
Si Substrate ◽  
Thermal Chemical Vapor Deposition ◽  
Surface Morphologies

Carbon coils could be synthesized using C2H2/H2as source gases and SF6as an incorporated additive gas under thermal chemical vapor deposition system. Si substrate, SiO2thin film deposited Si substrate (SiO2substrate), and quartz substrate were employed to elucidate the effect of substrate on the formation of carbon coils. The characteristics (formation densities, morphologies, and geometries) of the deposited carbon coils on the substrate were investigated. In case of Si substrate, the microsized carbon coils were dominant on the substrate surface. While, in case of SiO2substrate, the nanosized carbon coils were prevailing on the substrate surface. The surface morphologies of samples were investigated step by step during the reaction process. The cause for the different geometry formation of carbon coils according to the different substrates was discussed in association with the different thermal expansion coefficient values of Si and SiO2substrates and the different etched characteristics of Si and SiO2substrates by SF6 + H2flow.

Preparation and Characterization of Organic-Inorganic Hybrid Perovskite (C6H5CH2NH3)2CuCl4

2011 ◽  
Vol 311-313 ◽  
pp. 2146-2150
Author(s):  
Long Zou ◽  
Han Xing Liu ◽  
L.L. Guo ◽  
Guo Tao Xu ◽  
Gai Feng Xue
Keyword(s):  
Layer Structure ◽  
Quartz Substrate ◽  
Substrate Surface ◽  
X Ray Diffraction ◽  
Inorganic Hybrid ◽  
Good Thermal Stability ◽  
Atomic Force ◽  
Hybrid Perovskite ◽  
Thermo Gravimetric Analyzer ◽  
Inorganic Composition

An organic–inorganic hybrid perovskite (C6H5CH2NH3)2CuCl4was synthesized successfully by solution method at room temperature and the thin film of (C6H5CH2NH3)2CuCl4 was also prepared by spin-coating on the quartz substrate. The perovskite and the film were characterized with X-ray diffraction (XRD), Scan electronic microscope (SEM), Atomic force microscope (AFM), Fourier transform infrared spectroscopy and Thermo Gravimetric Analyzer. Results show that the obtained perovskite has unique layer structure and good thermal stability with melting point around 243.3°C. And the prepared film appears very smooth, continuous and uniform with a grain size of 0.1μm, highly oriented with the (0 0 l) planes perpendicular to the substrate surface. Its optical photoluminescence spectrum mainly depends on the inorganic part so the bandgap can be tuned by changing the inorganic composition. The carrier mobility is around 0.26cm2V-1S-1 , which indicates its potential application in field effect transistor with improved film quality.

scholarly journals Fabrication of Axial and Radial Heterostructures for Semiconductor Nanowires by Using Selective-Area Metal-Organic Vapor-Phase Epitaxy

2012 ◽  
Vol 2012 ◽  
pp. 1-29 ◽  
Author(s):  
K. Hiruma ◽  
K. Tomioka ◽  
P. Mohan ◽  
L. Yang ◽  
J. Noborisaka ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Surface Passivation ◽  
Substrate Surface ◽  
Semiconductor Nanowires ◽  
Vapor Phase Epitaxy ◽  
Core Shell ◽  
Photoluminescence Intensity ◽  
Organic Vapor ◽  
Selective Area ◽  
Metal Organic

The fabrication of GaAs- and InP-based III-V semiconductor nanowires with axial/radial heterostructures by using selective-area metal-organic vapor-phase epitaxy is reviewed. Nanowires, with a diameter of 50–300 nm and with a length of up to 10 μm, have been grown along the〈111〉B or〈111〉A crystallographic orientation from lithography-defined SiO2mask openings on a group III-V semiconductor substrate surface. An InGaAs quantum well (QW) in GaAs/InGaAs nanowires and a GaAs QW in GaAs/AlGaAs or GaAs/GaAsP nanowires have been fabricated for the axial heterostructures to investigate photoluminescence spectra from QWs with various thicknesses. Transmission electron microscopy combined with energy dispersive X-ray spectroscopy measurements have been used to analyze the crystal structure and the atomic composition profile for the nanowires. GaAs/AlGaAs, InP/InAs/InP, and GaAs/GaAsP core-shell structures have been found to be effective for the radial heterostructures to increase photoluminescence intensity and have enabled laser emissions from a single GaAs/GaAsP nanowire waveguide. The results have indicated that the core-shell structure is indispensable for surface passivation and practical use of nanowire optoelectronics devices.

scholarly journals Making Image More Energy Efficient for OLED Smart Devices

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Deguang Li ◽  
Bing Guo ◽  
Yan Shen ◽  
Junke Li ◽  
Yanhui Huang
Keyword(s):  
Spatial Information ◽  
Light Emitting Diode ◽  
Region Of Interest ◽  
Detection Algorithm ◽  
Smart Devices ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Battery Capacity ◽  
Display Technology ◽  
Energy Consuming

Now, more and more mobile smart devices are emerging massively; energy consumption of these devices has become an important consideration due to the limitation of battery capacity. Displays are the dominant energy consuming component of battery-operated devices, giving rise to organic light-emitting diode (OLED) as a new promising display technology, which consumes different power when displaying different content due to their emissive nature. Based on this property, we propose an approach to improve image energy efficiency on OLED displays by perceiving image content. The key idea of our approach is to eliminate undesired details while preserving the region of interest of the image by leveraging the color and spatial information. First, we use edge detection algorithm to extract region of interest (ROI) of an image. Next, we gradually change luminance and saturation of region of noninterest (NON-ROI) of the image. Then we perform detailed experiment and case study to validate our approach; experiment results show that our approach can save 22.5% energy on average while preserving high quality of the image.

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