scholarly journals Recent Progress of Organic Photovoltaics with Efficiency over 17%

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4200
Author(s):  
Xuelin Wang ◽  
Qianqian Sun ◽  
Jinhua Gao ◽  
Jian Wang ◽  
Chunyu Xu ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Near Infrared ◽  
Power Conversion ◽  
Research Work ◽  
Infrared Light ◽  
Materials Selection ◽  
Donor And Acceptor ◽  
Narrow Bandgap ◽  
Tandem Structure ◽  
Selection For

The power conversion efficiency (PCE) of organic photovoltaics (OPVs) has exceeded 18% with narrow bandgap, non-fullerene materials Y6 or its derivatives when used as an electron acceptor. The PCE improvement of OPVs is due to strong photon harvesting in near-infrared light range and low energy loss. Meanwhile, ternary strategy is commonly recognized as a convenient and efficient means to improve the PCE of OPVs. In this review article, typical donor and acceptor materials in prepared efficient OPVs are summarized. From the device engineering perspective, the typical research work on ternary strategy and tandem structure is introduced for understanding the device design and materials selection for preparing efficient OPVs.

Plasmon enhanced up-conversion nanoparticles in perovskite solar cells for effective utilization of near infrared light

Nanoscale ◽  
2019 ◽  
Vol 11 (47) ◽  
pp. 22813-22819 ◽  
Author(s):  
Jiyoon Park ◽  
Kihyeun Kim ◽  
Eun-Jung Jo ◽  
Woochul Kim ◽  
Hyeonghun Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Surface Plasmon Resonance ◽  
Gold Electrode ◽  
Near Infrared ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Infrared Light ◽  
Combined Effects ◽  
Effective Utilization ◽  
Electrode Interface

The power conversion efficiency of perovskite solar cells is enhanced by the combined effects of the utilization of NIR in UCNPs and surface plasmon resonance phenomena at the UCNP/top gold electrode interface.

Lead selenide quantum dots and carbon dots amplify solar conversion capability of a TiO2/CdS photoanode

2015 ◽  
Vol 3 (41) ◽  
pp. 20715-20726 ◽  
Author(s):  
Ramesh K. Kokal ◽  
P. Naresh Kumar ◽  
Melepurath Deepa ◽  
Avanish Kumar Srivastava
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Power Conversion Efficiency ◽  
Carbon Dots ◽  
Near Infrared ◽  
Power Conversion ◽  
Integrated Approach ◽  
Infrared Light ◽  
Cds Quantum Dots ◽  
Solar Conversion

An integrated approach involving the use of visible light absorbing CdS quantum dots (QDs) and near infrared light harvesting PbSe QDs, along with highly conducting carbon dots (C-dots), resulting in impressive power conversion efficiency (PCE) is presented.

scholarly journals Modified Fuzzy Logic Method for Materials Selection in Mechanical Engineering Design

2021 ◽  
Author(s):  
Mostafa Sharifan ◽  
Ali Abedian ◽  
Pardis Razaghian
Keyword(s):  
Fuzzy Logic ◽  
Research Work ◽  
High Volume ◽  
Alternative Methods ◽  
Materials Selection ◽  
Fuzzy Logic Method ◽  
Quantitative Properties ◽  
Selection For ◽  
High Range ◽  
Logic Method

Abstract Materials selection is one of the primary steps in designing products, including mechanical ones. As a result, researchers are continuously developing simple, accurate, and feasible techniques to enhance the performance of the designed component by selecting the optimum materials from a wide variety of candidate materials. In this research work, a modified fuzzy approach referred to as Modified Fuzzy Logic Method (MFLM) is proposed to provide some highly appreciated advantages besides resolving some of the substantial shortcomings of the existing solutions. Customizing the method based on the designer’s knowledge and level of expertise, simultaneous consideration of qualitative and quantitative properties, and high accuracy in the ranking of candidate materials are some of the significant benefits of MFLM in comparison to the available alternative methods. While, complexity, high volume computational efforts, and more are amongst the resolved drawbacks. Moreover, the produced results show the power and simplicity of the technique in solving complex problems like materials selection for a gas turbine blade which involves a high range working temperature.

Design of narrow bandgap non-fullerene acceptors for photovoltaic applications and investigation of non-geminate recombination dynamics

2020 ◽  
Vol 8 (43) ◽  
pp. 15175-15182 ◽  
Author(s):  
Joachim Vollbrecht ◽  
Jaewon Lee ◽  
Seo-Jin Ko ◽  
Viktor V. Brus ◽  
Akchheta Karki ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Organic Photovoltaics ◽  
Near Infrared ◽  
Geminate Recombination ◽  
Narrow Bandgap ◽  
Photovoltaic Applications ◽  
Recombination Dynamics

A new narrow bandgap non-fullerene electron acceptor was designed, synthesized, and characterized for near-infrared organic photovoltaics.

A privileged ternary blend enabling non-fullerene organic photovoltaics with over 14% efficiency

2020 ◽  
Vol 8 (43) ◽  
pp. 15135-15141
Author(s):  
Jing Yan ◽  
Yuan-Qiu-Qiang Yi ◽  
Jianqi Zhang ◽  
Huanran Feng ◽  
Yanfeng Ma ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Power Conversion ◽  
Ternary Blend ◽  
Conversion Efficiencies

Two non-fullerene small molecule acceptors, NT-4F and NT-4Cl, were designed and synthesized. Power conversion efficiencies of 11.44% and 14.55% were achieved for NT-4Cl-based binary and ternary devices, respectively.

Fluorescent proteins for in vivo imaging, where's the biliverdin?

2020 ◽  
Vol 48 (6) ◽  
pp. 2657-2667
Author(s):  
Felipe Montecinos-Franjola ◽  
John Y. Lin ◽  
Erik A. Rodriguez
Keyword(s):  
Hydrogen Peroxide ◽  
In Vivo Imaging ◽  
Near Infrared ◽  
Fluorescent Protein ◽  
Fluorescent Proteins ◽  
Fluorescent Imaging ◽  
Infrared Light ◽  
Red Fluorescent Protein ◽  
Color Palette

Noninvasive fluorescent imaging requires far-red and near-infrared fluorescent proteins for deeper imaging. Near-infrared light penetrates biological tissue with blood vessels due to low absorbance, scattering, and reflection of light and has a greater signal-to-noise due to less autofluorescence. Far-red and near-infrared fluorescent proteins absorb light >600 nm to expand the color palette for imaging multiple biosensors and noninvasive in vivo imaging. The ideal fluorescent proteins are bright, photobleach minimally, express well in the desired cells, do not oligomerize, and generate or incorporate exogenous fluorophores efficiently. Coral-derived red fluorescent proteins require oxygen for fluorophore formation and release two hydrogen peroxide molecules. New fluorescent proteins based on phytochrome and phycobiliproteins use biliverdin IXα as fluorophores, do not require oxygen for maturation to image anaerobic organisms and tumor core, and do not generate hydrogen peroxide. The small Ultra-Red Fluorescent Protein (smURFP) was evolved from a cyanobacterial phycobiliprotein to covalently attach biliverdin as an exogenous fluorophore. The small Ultra-Red Fluorescent Protein is biophysically as bright as the enhanced green fluorescent protein, is exceptionally photostable, used for biosensor development, and visible in living mice. Novel applications of smURFP include in vitro protein diagnostics with attomolar (10−18 M) sensitivity, encapsulation in viral particles, and fluorescent protein nanoparticles. However, the availability of biliverdin limits the fluorescence of biliverdin-attaching fluorescent proteins; hence, extra biliverdin is needed to enhance brightness. New methods for improved biliverdin bioavailability are necessary to develop improved bright far-red and near-infrared fluorescent proteins for noninvasive imaging in vivo.

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