scholarly journals Porous perovskite films integrated with Au–Pt nanowire-based electrodes for highly flexible large-area photodetectors

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Rohit Saraf ◽  
Hua Fan ◽  
Vivek Maheshwari
Keyword(s):  
High Performance ◽  
Mechanical Stability ◽  
Optoelectronic Devices ◽  
Cost Effective ◽  
Ambient Air ◽  
Single Step ◽  
Environmental Stability ◽  
Fast Method ◽  
Large Area ◽  
Research Attention

AbstractFlexible, large-area, and stable perovskite photodetectors have drawn increasing widespread research attention for next-generation wearable and portable optoelectronic devices. However, high mechanical durability coupled with large device area and enhanced environmental stability has not been demonstrated yet to attain practical viability. Herein, a highly bendable, stable, and large-area (3 cm2) flexible polystyrene incorporated perovskite photodetector is presented. Due to the formation of a porous polystyrene-perovskite composite film in a single step it allows unprecedented mechanical stability, maintaining 85% of its original photocurrent value after 10,000 bending cycles at a bending angle of 120°. Equally crucial, the solution-processed self-assembled Pt–Au nanochains were developed to provide a simple and fast method of patterning the conductive and flexible electrodes onto the filter substrate. The optimized polystyrene-perovskite photodetector exhibits a high responsivity up to 2.73 A W−1, a maximum specific detectivity of 6.2 × 1013 Jones, and a superior switching ratio of 1.0 × 104. In addition, the polystyrene-perovskite photodetector yields excellent stability under the combined stresses of moisture, ambient air, and room light, and retains 92% of its original performance for over 30 days. All these results demonstrate that this work provides a facile and cost-effective approach that paves the way to develop high-performance, stable, and highly flexible optoelectronic devices.

Engineering Rhynchostylis retusa-like heterostructured α-nickel molybdate with enhanced redox properties for high-performance rechargeable asymmetric supercapacitors

2019 ◽  
Vol 7 (47) ◽  
pp. 26893-26904 ◽  
Author(s):  
Ganji Seeta Rama Raju ◽  
Eluri Pavitra ◽  
Goli Nagaraju ◽  
Nilesh R. Chodankar ◽  
Sujaya Kumar Vishwanath ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Cost Effective ◽  
Single Step ◽  
Redox Properties ◽  
Asymmetric Supercapacitors ◽  
Wet Chemistry ◽  
Nickel Molybdate ◽  
Superior Electrochemical Properties

Rhynchostylis retusa-like α-NiMoO4 was synthesized using a simple, single-step, and cost-effective wet-chemistry approach, and it exhibited the superior electrochemical properties.

scholarly journals The Influence of Fiber Cross-Section on Fabric Far-Infrared Properties

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1147 ◽  
Author(s):  
Yifei Tao ◽  
Tenghao Li ◽  
Chenxiao Yang ◽  
Naixiang Wang ◽  
Feng Yan ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Far Infrared ◽  
Cost Effective ◽  
Optical Path Difference ◽  
Path Difference ◽  
Environmental Stability ◽  
Theoretical Simulation ◽  
Circular Fiber ◽  
Facile Fabrication

Far-infrared radiation (FIR) possesses various promising properties that are beneficial to an individuals’ health. Exploring the interaction between fiber shapes and FIR performance is thought to be a significant means to develop highly-efficient FIR textile products. In this study, a non-additive triangular polyamide (PA) fiber showed excellent FIR properties in both theoretical simulation and experimental verification aspects. The triangular PA fiber affords a higher probability to facilitate large optical path difference, improving both FIR absorption and emission. Textiles woven with the specific triangular PA fiber achieved a remarkable emissivity of 91.85% and temperature difference of 2.11 Celsius, which is obviously superior to the reference circular fiber (86.72%, 1.52 Celsius). Considering the low cost, environmental stability, facile fabrication, as well as being environmentally friendly, this non-additive triangular PA fiber has great potential for high-performance and cost-effective FIR textiles in the future.

scholarly journals Direct roll transfer printed silicon nanoribbon arrays based high-performance flexible electronics

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Ayoub Zumeit ◽  
Abhishek Singh Dahiya ◽  
Adamos Christou ◽  
Dhayalan Shakthivel ◽  
Ravinder Dahiya
Keyword(s):  
Flexible Electronics ◽  
High Performance ◽  
Printed Electronics ◽  
Field Effect Transistors ◽  
High Mobility ◽  
Single Step ◽  
High Yield ◽  
Transfer Printing ◽  
Large Area ◽  
Direct Printing

AbstractTransfer printing of high mobility inorganic nanostructures, using an elastomeric transfer stamp, is a potential route for high-performance printed electronics. Using this method to transfer nanostructures with high yield, uniformity and excellent registration over large area remain a challenge. Herein, we present the ‘direct roll transfer’ as a single-step process, i.e., without using any elastomeric stamp, to print nanoribbons (NRs) on different substrates with excellent registration (retaining spacing, orientation, etc.) and transfer yield (∼95%). The silicon NR based field-effect transistors printed using direct roll transfer consistently show high performance i.e., high on-state current (Ion) >1 mA, high mobility (μeff) >600 cm2/Vs, high on/off ratio (Ion/off) of around 106, and low hysteresis (<0.4 V). The developed versatile and transformative method can also print nanostructures based on other materials such as GaAs and thus could pave the way for direct printing of high-performance electronics on large-area flexible substrates.

HIGH MOBILITY CONJUGATED POLYMER SEMICONDUCTORS FOR ORGANIC THIN FILM TRANSISTORS

COSMOS ◽  
2009 ◽  
Vol 05 (01) ◽  
pp. 59-77
Author(s):  
YUNING LI ◽  
BENG S. ONG
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
High Performance ◽  
High Mobility ◽  
Cost Effective ◽  
Charge Carrier Mobility ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Large Area ◽  
Polymer Semiconductors

Organic thin film transistors (OTFTs) are promising candidates as alternatives to silicon TFTs for applications where light weight, large area and flexibility are required. OTFTs have shown potential for cost effective fabrication using solution deposition techniques under mild conditions. However, two major issues must be addressed prior to the commercialization of OTFT-based electronics: (i) low charge mobilities and (ii) insufficient air stability. This article reviews recent progress in the design and development of thiophene-based polymer semiconductors as channel materials for OTFTs. To date, both high performance p-type and n-type thiophene-based polymers with benchmark charge carrier mobility of > 0.5 cm2 V-1 s-1 have been archived, which bring printed OTFTs one step closer to commercialization.

scholarly journals DEVELOPMENT AND VALIDATION OF A RP-HPLC METHOD FOR ESTIMATION OF TELMISARTAN IN HUMAN PLASMA

2019 ◽  
Vol 11 (1) ◽  
pp. 237
Author(s):  
P. Ashok ◽  
S. T. Narenderan ◽  
S. N. Meyyanathan ◽  
B. Babu ◽  
R. Vadivelan
Keyword(s):  
Human Plasma ◽  
High Performance ◽  
Cost Effective ◽  
High Performance Liquid Chromatographic ◽  
Hplc Method ◽  
Single Step ◽  
Precipitation Method ◽  
Phase Detection ◽  
Solution Ph ◽  
Us Fda

Objective: The present study was aimed to develop a rapid, specific and sensitive method based on high performance liquid chromatographic method was developed for the determination of telmisartan using indapamide as an internal standard.Methods: The utilization of single step protein precipitation method using methanol as a precipitating agent becomes suitable for analysis of a large number of samples. The developed method was validated as per US-FDA guidelines for telmisartan in human plasma.Result: An isocratic separation was achieved using Hibar C18 (250 x 4.6 mm, 5 μm) column using 10 mmol ammonium formate solution (pH 4.0)–methanol (70:30, v/v) as the mobile phase. Detection was carried out at 275 nm. The method was validated over the range of 0.1–1.5 µg/ml in human plasma with a regression analysis of 0.996. The percentage recovery of the present method was found to be 94.0–99.2 %.Conclusion: The developed analytical method was found to be rapid, single step, plasma preparation coupled with the simple high-performance liquid chromatography coupled with UV detection (HPLC–UV) isocratic chromatographic apparatus makes the method cost-effective and suitable for analysis of a large number of samples.

Eight-Ton Advanced GAX Cycle Prototype Results

2000 ◽  
Author(s):  
G. Anand ◽  
Donald C. Erickson
Keyword(s):  
High Performance ◽  
Cost Effective ◽  
Ambient Air ◽  
Small Scale ◽  
Ambient Conditions ◽  
Economy Of Scale ◽  
Effective Components ◽  
Pressure Cycle ◽  
Market Status ◽  
Commercial Applications

Abstract The advanced Vapor eXchange Generator Absorber heat eXchange (VX GAX) cycle has similar components as the basic GAX cycle but is a three-pressure cycle and makes more complete use of the GAX temperature overlap. Less external heat is supplied to the generator, and the cycle efficiency is increased. A breadboard prototype of a gas-fired heat pump using the VX GAX cycle has been developed and tested. A higher COP was achieved using reliable and cost effective components. This paper presents the VX GAX cycle breadboard design concept, the hardware realization, and the performance achieved. Several novel concepts were incorporated to achieve the design objectives of higher efficiency and capacity, lower cost, compactness, avoidance of code restrictions, and operability from 49°C (120°F) summer to −8°C (17°F) winter ambient conditions. The prototype results have confirmed the high performance capability of the advanced GAX cycle. At 35°C (95°F) ambient air-cooled conditions, a gas-cooling COP of 0.85 was achieved at design capacity. This is a 20% improvement relative to current basic GAX chillers. The eight-ton capacity is ideal for small-scale commercial applications and provides economy of scale. The wide ambient operating range is key to year-round operation and attractive payback in all climate zones. The demonstrated improvement in both system performance and cost is key to achieving nationwide mass-market status.

Nitrogen-doped graphene encapsulated cobalt iron sulfide as an advanced electrode for high-performance asymmetric supercapacitors

2019 ◽  
Vol 7 (8) ◽  
pp. 3941-3952 ◽  
Author(s):  
Yazan Al Haj ◽  
Jayaraman Balamurugan ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Iron Sulfide ◽  
Hydrothermal Process ◽  
Cost Effective ◽  
Single Step ◽  
Cobalt Iron ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

A novel core–shell Co8FeS8@NG hybrid was synthesized through a simple, cost effective, single-step in situ hydrothermal process, exhibiting superior electrochemical performance as advanced electrode materials in solid-state supercapacitors.

scholarly journals Polymer Amplification to Improve Performance and Stability Towards Semi-Transparent Perovskite Solar Cells Fabrication

2019 ◽  
Author(s):  
Hafez Nikbakht ◽  
Ahmed Esmail Shalan ◽  
Manuel Salado ◽  
Abbas Assadi ◽  
Parviz Boroojerdian ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Cost Effective ◽  
Spectroscopic Properties ◽  
Charge Transfer Resistance ◽  
Large Area ◽  
Transfer Resistance

<p>The performance of methylammonium lead triiodide (CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>) based solar cells depends on its crystallization and controlled microstructure. In spite of its high performance, long-term stability is a paramount factor towards its large area fabrication and potential industrialization. Herein, we have employed poly(vinylidene fluoride−trifluoro ethylene) P(VDF-TrFE) as an additive into a low concentration based perovskite precursor solutions to control the crystallinity and microstructure. Perovskite layers of lower thickness can be derived from low precursor concentration, however it often suffers from severe voids and roughness. Introducing judicious quantities of P(VDF-TrFE) can improve the surface coverage, smoothness as well as reduces the grain boundaries in the perovskite. An array of characterization techniques were utilized to probe the structural, microstructural and spectroscopic properties. Impedance spectra suggests, the P(VDF-TrFE) can improve the carrier lifetimes and reduce the charge transfer resistance, which in turn allows to improve photovoltaic performance. For an optimized concentration of P(VDF-TrFE), the fabricated semi-transparent solar cells yielded power conversion efficiency in excess of 10%, which supersede pristine devices along with improved stability. The device architect and the fabrication technique provide an effective route to fabricate cost effective and visible-light-semi-transparent perovskite solar cells.</p>

scholarly journals Carrier Blocking Layer Materials and Application in Organic Photodetectors

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1404
Author(s):  
Yi Li ◽  
Hu Chen ◽  
Jianhua Zhang
Keyword(s):  
High Performance ◽  
Spectral Response ◽  
Critical Role ◽  
Cost Effective ◽  
Image Sensors ◽  
Large Area ◽  
Solution Processes ◽  
Response Range ◽  
Long Time ◽  
Organic Photodetectors

As a promising candidate for next-generation photodetectors, organic photodetectors (OPDs) have gained increasing interest as they offer cost-effective fabrication methods using solution processes and a tunable spectral response range, making them particularly attractive for large area image sensors on lightweight flexible substrates. Carrier blocking layers engineering is very important to the high performance of OPDs that can select a certain charge carriers (holes or electrons) to be collected and suppress another carrier. Carrier blocking layers of OPDs play a critical role in reducing dark current, boosting their efficiency and long-time stability. This Review summarizes various materials for carrier blocking layers and some of the latest progress in OPDs. This provides the reader with guidelines to improve the OPD performance via carrier blocking layers engineering.

scholarly journals Uprooting defects to enable high-performance III–V optoelectronic devices on silicon

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Youcef A. Bioud ◽  
Abderraouf Boucherif ◽  
Maksym Myronov ◽  
Ali Soltani ◽  
Gilles Patriarche ◽  
...  
Keyword(s):  
Dislocation Density ◽  
High Performance ◽  
Optoelectronic Devices ◽  
Cost Effective ◽  
Deposition Process ◽  
Scale Production ◽  
Luminescence Efficiency ◽  
Low Dislocation Density ◽  
Mismatched Heteroepitaxy ◽  
Industrial Scale Production

Abstract The monolithic integration of III-V compound semiconductor devices with silicon presents physical and technological challenges, linked to the creation of defects during the deposition process. Herein, a new defect elimination strategy in highly mismatched heteroepitaxy is demonstrated to achieve a ultra-low dislocation density, epi-ready Ge/Si virtual substrate on a wafer scale, using a highly scalable process. Dislocations are eliminated from the epilayer through dislocation-selective electrochemical deep etching followed by thermal annealing, which creates nanovoids that attract dislocations, facilitating their subsequent annihilation. The averaged dislocation density is reduced by over three orders of magnitude, from ~108 cm−2 to a lower-limit of ~104 cm−2 for 1.5 µm thick Ge layer. The optical properties indicate a strong enhancement of luminescence efficiency in GaAs grown on this virtual substrate. Collectively, this work demonstrates the promise for transfer of this technology to industrial-scale production of integrated photonic and optoelectronic devices on Si platforms in a cost-effective way.

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