Flexible random lasers with tunable lasing emissions

Nanoscale ◽  
2018 ◽  
Vol 10 (22) ◽  
pp. 10403-10411 ◽  
Author(s):  
Ya-Ju Lee ◽  
Chun-Yang Chou ◽  
Zu-Po Yang ◽  
Thi Bich Hanh Nguyen ◽  
Yung-Chi Yao ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Random Laser ◽  
Random Lasers ◽  
High Degree ◽  
Pet Substrate

In this study, we experimentally demonstrated a flexible random laser fabricated on a polyethylene terephthalate (PET) substrate with a high degree of tunability in lasing emissions.

Plasma Pre-Treatment of Polyethylene Terephthalate Substrate Influence on the Properties of ZnO Thin Film

2014 ◽  
Vol 895 ◽  
pp. 41-44
Author(s):  
Seiw Yen Tho ◽  
Kamarulazizi Ibrahim
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Polyethylene Terephthalate ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Zno Thin Films ◽  
Zno Thin Film ◽  
Water Contact ◽  
Pre Treatment ◽  
Pet Substrate

In this work, the influences of plasma pre-treatment on polyethylene terephthalate (PET) substrate to the properties of ZnO thin film have been carried out. ZnO thin films were successfully grown on PET substrate by spin coating method. In order to study the effects of plasma pre-treatment, a comparison of treated and untreated condition was employed. Water contact angle measurement had been carried out for PET wettability study prior to ZnO thin film coating. Morphology study of ZnO thin film was performed by scanning probe microscope (SPM). Besides, optical study of the ZnO thin film was done by using UV-vis spectrophotometer. All the measured results show that plasma pre-treatment of PET substrate plays an important role in enhancing the wettability of PET and optical properties of the ZnO thin films. In conclusion, pre-treatment of PET surface is essential to produce higher quality ZnO thin film on this particular substrate in which would pave the way for the integration of future devices.

A curvature-tunable random laser

Nanoscale ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 3534-3545 ◽  
Author(s):  
Ya-Ju Lee ◽  
Ting-Wei Yeh ◽  
Zu-Po Yang ◽  
Yung-Chi Yao ◽  
Chen-Yu Chang ◽  
...  
Keyword(s):  
Free Path ◽  
Mean Free Path ◽  
Random Laser ◽  
Experimental Demonstration ◽  
Random Lasers

We report the first experimental demonstration of curvature-tunable random lasers to control the transport mean free path of emitted photons.

Bulk-Heterojunction Solar Cells Based on Poly(3-hexylthiophene) and (6,6)-phenyl-C61-butyric-acid Methyl Ester on Polyethylene Terephthalate Substrates

2013 ◽  
Vol 538 ◽  
pp. 3-6
Author(s):  
Yuichiro Yanagi ◽  
Takanori Okukawa ◽  
Akira Yoshida ◽  
Masaya Ohzeki ◽  
Tatsuki Yanagidate ◽  
...  
Keyword(s):  
Solar Cells ◽  
Methyl Ester ◽  
Polyethylene Terephthalate ◽  
Butyric Acid ◽  
Bulk Heterojunction ◽  
Acid Methyl Ester ◽  
Heterojunction Solar Cells ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester ◽  
Pet Substrate

Bulk-heterojunction solar cells were fabricated based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) on an indium tin oxide (ITO) coated flexible polyethylene terephthalate (PET) substrate. Performance improvements of the flexible solar cells by optimizing post thermal annealing conditions are reported. The solar cells annealed at 150 oC showed the minimal deformation of the PET substrate, and the resulted conversion efficiency was 1.35% under the light irradiation conditions of the Superscript textAM1.5 simulated solar intensity of 100 mW/cm2.

Pattern Visibility Enhancement by the Hybrimer Index-Matching Inter Layer in Oxide/Metal/Oxide-Structured Transparent Conductive Electrode on Flexible Polyethylene Terephthalate Substrates

2021 ◽  
Vol 21 (3) ◽  
pp. 1932-1936
Author(s):  
Youngsoo Cho ◽  
Guneik Jang
Keyword(s):  
Polyethylene Terephthalate ◽  
Titanium Isopropoxide ◽  
Multilayer Films ◽  
Molar Ratio ◽  
Transparent Conductive Electrode ◽  
Molar Ratios ◽  
Matching Layer ◽  
Index Matching ◽  
Refractive Index Matching ◽  
Pet Substrate

For this study, we fabricated transparent Mn-doped tin oxide (MTO)/Ag/MTO films with refractive index-matching layer on a polyethylene terephthalate (PET) substrate. The hybrimer indexmatching layer containing TIP (Titanium isopropoxide) in hydroxy terminated PDMS (PDMS-OH) matrix was placed between the MTO/Ag/MTO multilayer and PET substrate. MTO and Ag were deposited by using RF/DC magnetron sputtering at room temperature, whereas a hybrimer mixture was spin-coated on the PET substrate after adjusting the molar ratios between the TIP and PDMS-OH. Pattern visibility was examined by comparing the differences in the reflectance and transmittance of MTO/Ag/MTO multilayer films before and after placing the hybrimer index-matching layer. As the PDMS-OH concentration increased, the reflectance difference at the wavelength of 550 nm (ΔR550nm) showed a tendency of decreasing from 0.66% to 0.53%. The index-matched MTO/Ag/MTO multilayer films showed the highest transmittance (>86% at 550 nm) at a molar ratio of 1:4.

scholarly journals Inkjet-Printed Flexible Temperature Sensor Based on Silver Nanoparticles Ink

2020 ◽  
Vol 2 (1) ◽  
pp. 3
Author(s):  
Qiao Jun Liew ◽  
Aiman Sajidah Abd Aziz ◽  
Hing Wah Lee ◽  
Mai Woon Lee ◽  
Huzein Fahmi Hawari ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Linear Relationship ◽  
Polyethylene Terephthalate ◽  
Temperature Sensor ◽  
Large Scale ◽  
Average Width ◽  
Sensor Performance ◽  
Printed Sensors ◽  
Higher Sensitivity ◽  
Pet Substrate

In this research, a flexible inkjet-printed temperature sensor with in-house silver nanoparticles ink is presented and compared with the sensor printed with commercial silver nanoparticles ink. These sensors have an average width of 0.5 ± 0.04 mm in the latter and 0.5 ± 0.03 mm in the former. These serpentine-structure sensors were printed on polyethylene terephthalate (PET) substrate by using a Fujifilm Dimatix 2850 printer. The corresponding results indicating resistance have been recorded in the range of 30–100 °C to evaluate the sensor performance. The result of the studies showed that there was a linear relationship between the resistance and temperature for both ink types. The printed sensors developed using the in-house ink presented higher sensitivity, 0.1086 Ω/°C, compared to the commercial ink, which was 0.0543 Ω/°C. Therefore, the flexible inkjet-printed temperature sensor with the in-house silver nanoparticles ink is recommended for the large-scale productions and implementations.

scholarly journals Numerical Study on Broadband Antireflection of Moth-Eye Nanostructured Polymer Film with Flexible Polyethylene Terephthalate Substrate

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3313
Author(s):  
Jun Lan ◽  
Yong Yang ◽  
Song Hu
Keyword(s):  
Polymer Film ◽  
Polyethylene Terephthalate ◽  
Numerical Study ◽  
Polymer Materials ◽  
Base Diameter ◽  
Hexagonal Close Packed ◽  
Nanostructured Polymer ◽  
Broadband Antireflection ◽  
Polyethylene Terephthalate Substrate ◽  
Pet Substrate

The application of moth-eye nanostructured polymer film on the flexible polyethylene terephthalate (PET) substrate is an effective way to improve its antireflection (AR) performance. However, many factors affect the AR properties of the moth-eye structure in the actual manufacturing process. Moreover, the antireflection research based on PET substrate has been relatively lacking compared with the silicon substrate. In this paper, we simulate and analyze the AR performance of the moth-eye nanostructured polymer film on PET substrate by using the finite-difference time-domain method within the wavelength range of 400–1100 nm. Simulation results show that the parabola-shaped moth-eye structure (PSMS) can suppress the Fresnel reflection significantly. Moreover, the height and filling ratios are the dominant factors that affect the AR performance of PSMS. Additionally, the base diameter, residual layer thickness, and the refractive index of PSMS polymer film also affect the reflectivity of PET slightly. As a result, an optimal PSMS with base diameter of 400 nm, height of 300 nm, and the hexagonal close-packed arrangement is appropriate, and the solar-weighted reflectivity of PET can be suppressed to 0.21%, which shows a prominent advantage over the bare PET (≈6%). Therefore, this research has promising potential for improving the optical performance of optoelectronic devices by using nanostructured polymer materials.

scholarly journals Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems

Toxics ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 59
Author(s):  
Marta Llorca ◽  
Manuela Ábalos ◽  
Albert Vega-Herrera ◽  
Miquel A. Adrados ◽  
Esteban Abad ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Polyethylene Terephthalate ◽  
Food Chain ◽  
Environmental Conditions ◽  
Freundlich Isotherm ◽  
Water Systems ◽  
Lower Degree ◽  
Π Interactions ◽  
Adsorption Desorption ◽  
High Degree

The potential of microplastics (MPLs) in marine ecosystems to adsorb and transport other micropollutants to biota, contributing to their entry in the food chain, is a primary cause of concern. However, these interactions remain poorly understood. Here, we have evaluated the adsorption/desorption behaviour of marker polychlorinated biphenyls (PCBs), onto MPL surfaces of three widely used polymers—polystyrene (PS), polyethylene (PE), and polyethylene terephthalate (PET). The range of MPL sizes ranged from 1 to 600 μm. The adsorption/desorption was evaluated in sediment/water systems in marine microcosms emulating realistic environmental conditions for 21 days. The adsorption percentages ranged from 20 to 60%. PCBs with a lower degree of chlorination showed higher adsorption percentages because of conformational impediments of PCBs with high-degree chlorination, and also by their affinity to be adsorbed in sediments. Glassy plastic polymers as PET and PS showed a superior affinity for PCBs than rubbery polymers, such as PE. The polymers that can bond PCBs by π-π interactions, rather than van der Waals forces showed better adsorption percentages, as expected. Finally, the adsorption/desorption behaviour of selected PCBs onto MPLs was fitted to a Freundlich isotherm model, with correlations higher than 0.8 in most of the cases.

scholarly journals Flexible Random Laser Using Silver Nanoflowers

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 619 ◽  
Author(s):  
Junhua Tong ◽  
Songtao Li ◽  
Chao Chen ◽  
Yulan Fu ◽  
Fengzhao Cao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Flexible Substrate ◽  
Field Enhancement ◽  
Random Laser ◽  
Lasing Wavelength ◽  
Random Lasers ◽  
Phase Synthesis ◽  
Polymer Waveguide ◽  
Solution Phase Synthesis ◽  
Low Threshold

A random laser was achieved in a polymer membrane with silver nanoflowers on a flexible substrate. The strong confinement of the polymer waveguide and the localized field enhancement of silver nanoflowers were essential for the low-threshold random lasing action. The lasing wavelength can be tuned by bending the flexible substrate. The solution phase synthesis of the silver nanoflowers enables easy realization of this type of random lasers. The flexible and high-efficiency random lasers provide favorable factors for the development of imaging and sensing devices.

Preparation of fluorine-doped tin oxide (SnO2:F) film on polyethylene terephthalate (PET) substrate

2010 ◽  
Vol 64 (15) ◽  
pp. 1701-1703 ◽  
Author(s):  
Xiaoming Huang ◽  
Zhexun Yu ◽  
Shuqing Huang ◽  
Quanxin Zhang ◽  
Dongmei Li ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Tin Oxide ◽  
Pet Substrate

Detachment Deformation of Polyethylene Single Crystals

1982 ◽  
Vol 40 ◽  
pp. 678-679
Author(s):  
D.B. Alward ◽  
E.L. Thomas
Keyword(s):  
Single Crystals ◽  
Polyethylene Terephthalate ◽  
Theoretical Work ◽  
Chain Axis ◽  
And Behavior ◽  
Crack Position ◽  
Pet Substrate ◽  
The Way

Over the years there have been a great deal of studies on polyethylene single crystals. The experimental and theoretical work has focussed on not only the structure of the crystals, but also on the way in which they deform, in an effort to understand the structure and behavior of bulk samples. Many early studies dealt with the question of degree of adjacency of fold re-entry by plastically deforming the crystals in the plane of the crystals (perpendicular to the chain axis) on a polyethylene terephthalate (PET) substrate. The number and nature of fibrils pulled across the crack were observed as a function of crack position in the crystal and orientation to the stress. This work deals with a similar but different technique to strain the crystals, called detachment deformation.

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