A simple and effective design strategy to increase power conversion efficiency of linear charge pumps

2019 ◽  
Vol 48 (2) ◽  
pp. 157-161 ◽  
Author(s):  
Andrea Ballo ◽  
Alfio Dario Grasso ◽  
Gaetano Palumbo
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Design Strategy ◽  
Linear Charge ◽  
Charge Pumps ◽  
Effective Design

scholarly journals Optimization of Charge Pump Based on Piecewise Modeling of Output-Voltage Ripple

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4809
Author(s):  
Yajun Lin ◽  
Jianxin Yang ◽  
Tin-Wai Mui ◽  
Yong Zhou ◽  
Ka-Nang Leung
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Output Voltage ◽  
Power Conversion ◽  
Charge Pump ◽  
Switching Frequency ◽  
Linear Charge ◽  
Voltage Ripple ◽  
Accurate Design ◽  
Charge Pump Circuit

This work proposes a piecewise modeling of output-voltage ripple for linear charge pumps. The proposed modeling can obtain a more accurate design expression of power-conversion efficiency. The relationship between flying and output capacitance, as well as switching frequency and optimize power-conversion efficiency can be calculated. The proposed modeling is applied to three charge-pump circuits: 1-stage linear charge pump, dual-branch 1-stage linear charge pump and 4× cross-coupled charge pump. Circuit-level simulation is used to verify the accuracy of proposed modeling.

Enhancement of the Power-Conversion Efficiency of Organic Solar Cells via Unveiling an Appropriate Rational Design Strategy in Indacenodithiophene-alt-quinoxaline π-Conjugated Polymers

2018 ◽  
Vol 10 (12) ◽  
pp. 10236-10245 ◽  
Author(s):  
Christos L. Chochos ◽  
Ranbir Singh ◽  
Vasilis G. Gregoriou ◽  
Min Kim ◽  
Athanasios Katsouras ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Rational Design ◽  
Power Conversion ◽  
Design Strategy

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

The Effect of Donor Molecular Structure on Power Conversion Efficiency of Small-Molecule-Based Organic Solar Cells

2019 ◽  
Vol 16 (3) ◽  
pp. 236-243 ◽  
Author(s):  
Hui Zhang ◽  
Yibing Ma ◽  
Youyi Sun ◽  
Jialei Liu ◽  
Yaqing Liu ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Molecular Design ◽  
Power Conversion ◽  
The Relationship

In this review, small-molecule donors for application in organic solar cells reported in the last three years are highlighted. Especially, the effect of donor molecular structure on power conversion efficiency of organic solar cells is reported in detail. Furthermore, the mechanism is proposed and discussed for explaining the relationship between structure and power conversion efficiency. These results and discussions draw some rules for rational donor molecular design, which is very important for further improving the power conversion efficiency of organic solar cells based on the small-molecule donor.

Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss

2019 ◽  
Vol 7 (15) ◽  
pp. 9025-9033 ◽  
Author(s):  
Jin-Feng Liao ◽  
Wu-Qiang Wu ◽  
Jun-Xing Zhong ◽  
Yong Jiang ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Charge Recombination ◽  
Open Circuit ◽  
Polymeric Semiconductor ◽  
Voltage Loss ◽  
Defect Passivation

A multifunctional 2D polymeric semiconductor was incorporated to provide surprisingly robust efficacy in grain boundary functionalization and defect passivation of perovskite, which suppresses charge recombination and thus affording an illustrious photovoltage of 1.16 V and power conversion efficiency of 21.1%.

scholarly journals High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhenrong Jia ◽  
Shucheng Qin ◽  
Lei Meng ◽  
Qing Ma ◽  
Indunil Angunawela ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Short Circuit ◽  
Power Conversion ◽  
High Power Conversion Efficiency ◽  
Device Structure ◽  
Narrow Bandgap

AbstractTandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.

Renovating electrical power-to-TEM00 mode laser power conversion efficiency with four-lamp/four-rod pumping scheme

2021 ◽  
pp. 1-11
Author(s):  
Miguel Catela ◽  
Dawei Liang ◽  
Cláudia R. Vistas ◽  
Dário Garcia ◽  
Bruno D. Tibúrcio ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Laser Power ◽  
Power Conversion ◽  
Electrical Power ◽  
Mode Laser ◽  
Tem00 Mode

scholarly journals Digital printing of a novel electrode for stable flexible organic solar cells with a power conversion efficiency of 8.5%

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Wageh ◽  
Mahfoudh Raïssi ◽  
Thomas Berthelot ◽  
Matthieu Laurent ◽  
Didier Rousseau ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Solution Processed ◽  
Transparent Conducting

AbstractPoly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) mixed with single-wall nanotubes (SWNTs) (10:1) and doped with (0.1 M) perchloric acid (HClO4) in a solution-processed film, working as an excellent thin transparent conducting film (TCF) in organic solar cells, was investigated. This new electrode structure can be an outstanding substitute for conventional indium tin oxide (ITO) for applications in flexible solar cells due to the potential of attaining high transparency with enhanced conductivity, good flexibility, and good durability via a low-cost process over a large area. In addition, solution-processed vanadium oxide (VOx) doped with a small amount of PEDOT-PSS(PH1000) can be applied as a hole transport layer (HTL) for achieving high efficiency and stability. From these viewpoints, we investigate the benefit of using printed SWNTs-PEDOT-PSS doped with HClO4 as a transparent conducting electrode in a flexible organic solar cell. Additionally, we applied a VOx-PEDOT-PSS thin film as a hole transporting layer and a blend of PTB7 (polythieno[3,4-b] thiophene/benzodithiophene): PC71BM (phenyl-C71-butyric acid methyl ester) as an active layer in devices. Zinc oxide (ZnO) nanoparticles were applied as an electron transport layer and Ag was used as the top electrode. The proposed solar cell structure showed an enhancement in short-circuit current, power conversion efficiency, and stability relative to a conventional cell based on ITO. This result suggests a great carrier injection throughout the interfacial layer, high conductivity and transparency, as well as firm adherence for the new electrode.

scholarly journals Repeater Power Conversion Efficiency in Submarine Optical Communication Systems

2021 ◽  
Vol 13 (1) ◽  
pp. 1-10
Author(s):  
Xiaojun Liang ◽  
John D. Downie ◽  
Jason E. Hurley
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Optical Communication ◽  
Communication Systems ◽  
Power Conversion ◽  
Optical Communication Systems

Effects of the PENTACENE as doping material on the power conversion efficiency of P3HT:PCBM based ternary organic solar cells

2021 ◽  
Vol 607 ◽  
pp. 412859
Author(s):  
Z. Çaldıran ◽  
Ü. Erkem ◽  
A. Baltakesmez ◽  
M. Biber
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
As Doping
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