Achieving a solar power conversion efficiency exceeding 9% by modifying the structure of a simple, inexpensive and highly scalable polymer

2016 ◽  
Vol 4 (47) ◽  
pp. 18585-18597 ◽  
Author(s):  
Gururaj P. Kini ◽  
Sang Kyu Lee ◽  
Won Suk Shin ◽  
Sang-Jin Moon ◽  
Chang Eun Song ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Conjugated Polymer ◽  
Large Scale ◽  
High Efficiency ◽  
Solar Power ◽  
Molecular Design ◽  
Power Conversion ◽  
Cost Effective ◽  
Large Scale Synthesis

The synthesized conjugated polymer with optimized molecular design was simple, cost-effective and compatible for large-scale synthesis and exhibited high efficiency,i.e., >9%.

Film morphology of solution-processed regioregular ternary conjugated polymer solar cells under processing additive stress

2017 ◽  
Vol 5 (19) ◽  
pp. 8903-8908 ◽  
Author(s):  
Jianyu Yuan ◽  
Michael J. Ford ◽  
Wanli Ma ◽  
Guillermo C. Bazan
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Conjugated Polymer ◽  
High Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Film Morphology ◽  
Solution Processed

In comparison with many reported high-efficiency polymer solar cells, only 0.5% (v/v) additive is necessary to optimize a polymer/fullerene (PSFSiF/PC71BM) system, and the power conversion efficiency (PCE) was boosted from 2.4% to 8.0%.

scholarly journals Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots

2021 ◽  
Author(s):  
Xing Lin ◽  
Xingliang Dai ◽  
Zikang Ye ◽  
Yufei Shu ◽  
Xiaogang Peng
Keyword(s):  
Quantum Dots ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Power Conversion ◽  
Cost Effective ◽  
Colloidal Quantum Dots ◽  
Driving Voltage ◽  
Light Emitting

Abstract Pumped by sub-bandgap electric work and Peltier heat, thermoelectric-pumped light-emitting diodes (TEP-LEDs) can achieve a power-conversion-efficiency greater than 100%. However, cost-effective and high-efficiency TEP-LEDs are not readily accessible for the epitaxially grown III-V LEDs due to the high chip cost and efficiency droop at sub-bandgap voltages. Photoluminescence with power-conversion-efficiency above unity through phonon-assisted excitation has been realized in high-quality colloidal quantum dots (QDs), owing to their defect-free nature. Here, we show that solution-processed QD-LEDs (QLEDs) can achieve high power-conversion-efficiency and high brightness, circumventing the deficiency faced by conventional LEDs. The optimal red-emitting device exhibits internal power-conversion-efficiency of 93.5% at 100 cd m-2. At this brightness, the driving voltage (V) of 1.89 V is much lower than the photon voltage (Vp =hv/q = 1.96 V). Our results highlight that TEP-LEDs can be constructed by integrating large-scale solution processing techniques and chemical-grade materials, towards cost-effective display and lighting applications.

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.

A new fluoropyrido[3,4-b]pyrazine based polymer for efficient photovoltaics

2017 ◽  
Vol 8 (14) ◽  
pp. 2227-2234 ◽  
Author(s):  
Tao Wang ◽  
Lihui Jiang ◽  
Jun Yuan ◽  
Liuliu Feng ◽  
Zhi-Guo Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Electron Donor ◽  
Conjugated Polymer ◽  
Polymer Solar Cells ◽  
Power Conversion

Using a fluoropyrido[3,4-b]pyrazine based 2D-conjugated polymer as an electron donor in polymer solar cells, a power conversion efficiency of 6.2% is obtained, which is the highest PCE among the PP-based polymers reported to date.

scholarly journals High Efficiency Buck-Boost Converter with Three Modes Selection for HV Applications using 0.18 μm Technology

2020 ◽  
Vol 18 (2) ◽  
pp. 137-144
Author(s):  
Fouad Farah ◽  
Mustapha El Alaoui ◽  
Abdelali El Boutahiri ◽  
Mounir Ouremchi ◽  
Karim El Khadiri ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Output Voltage ◽  
High Efficiency ◽  
Power Conversion ◽  
Boost Converter ◽  
Current Control ◽  
Voltage Range ◽  
Operating Modes ◽  
Soft Start

In this paper, we aim to make a detailed study on the evaluation and the characteristics of the non-inverting buck–boost converter. In order to improve the behaviour of the buck-boost converter for the three operating modes, we propose an architecture based on peak current-control. Using a three modes selection circuit and a soft start circuit, this converter is able to expand the power conversion efficiency and reduce inrush current at the feedback loop. The proposed converter is designed to operate with a variable output voltage. In addition, we use LDMOS transistors with low on-resistance, which are adequate for HV applications. The obtained results show that the proposed buck-boost converter perform perfectly compared to others architecture and it is successfully implemented using 0.18 μm CMOS TSMC technology, with an output voltage regulated to 12V and input voltage range of 4-20 V. The power conversion efficiency for the three operating modes buck, boost and buck-boost are 97.6%, 96.3% and 95.5% respectively at load current of 4A.

scholarly journals The role of connectivity in significant bandgap narrowing for fused-pyrene based non-fullerene acceptors toward high-efficiency organic solar cells

2020 ◽  
Vol 8 (12) ◽  
pp. 5995-6003 ◽  
Author(s):  
Shungang Liu ◽  
Wenyan Su ◽  
Xianshao Zou ◽  
Xiaoyan Du ◽  
Jiamin Cao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Structural Isomer ◽  
Bandgap Narrowing ◽  
Higher Power

Isomers of non-fullerene acceptors with pyrene as cores but fused at different positions were studied. FPIC6 possessed ∼119 nm of red-shift absorption and much higher power conversion efficiency of 11.55% as compared to its structural isomer FPIC5.

A Novel Naphtho[1,2-c:5,6-c′]Bis([1,2,5]Thiadiazole)-Based Narrow-Bandgap π-Conjugated Polymer with Power Conversion Efficiency Over 10%

2016 ◽  
Vol 28 (44) ◽  
pp. 9811-9818 ◽  
Author(s):  
Yaocheng Jin ◽  
Zhiming Chen ◽  
Sheng Dong ◽  
Nannan Zheng ◽  
Lei Ying ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Conjugated Polymer ◽  
Power Conversion ◽  
Narrow Bandgap

Trendsetters in High‐Efficiency Organic Solar Cells: Toward 20% Power Conversion Efficiency

Solar RRL ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1900342 ◽  
Author(s):  
Mushfika Baishakhi Upama ◽  
Md Arafat Mahmud ◽  
Gavin Conibeer ◽  
Ashraf Uddin
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion

scholarly journals A Review on Improving the Quality of Perovskite Films in Perovskite Solar Cells via the Weak Forces Induced by Additives

2019 ◽  
Vol 9 (20) ◽  
pp. 4393 ◽  
Author(s):  
Jien Yang ◽  
Songhua Chen ◽  
Jinjin Xu ◽  
Qiong Zhang ◽  
Hairui Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Term Stability ◽  
Long Term Stability ◽  
Weak Forces

Perovskite solar cells (PSCs) employing organic-inorganic halide perovskite as active layers have attracted the interesting of many scientists since 2009. The power conversion efficiency (PCE) have pushed certified 25.2% in 2019 from initial 3.81% in 2009, which is much faster than that of any type of solar cell. In the process of optimization, many innovative approaches to improve the morphology of perovskite films were developed, aiming at elevate the power conversion efficiency of perovskite solar cells (PSCs) as well as long-term stability. In the context of PSCs research, the perovskite precursor solutions modified with different additives have been extensively studied, with remarkable progress in improving the whole performance. In this comprehensive review, we focus on the forces induced by additives between the cations and anions of perovskite precursor, such as hydrogen bonds, coordination or some by-product (e.g., mesophase), which will lead to form intermediate adduct phases and then can be converted into high quality films. A compact uniform perovskite films can not only upgrade the power conversion efficiency (PCE) of devices but also improve the stability of PSCs under ambient conditions. Therefore, strategies for the implementation of additives engineering in perovskites precursor solution will be critical for the future development of PSCs. How to manipulate the weak forces in the fabrication of perovskite film could help to further develop high-efficiency solar cells with long-term stability and enable the potential of future practical applications.

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