Effect of fluorine substitution on the photovoltaic performance of poly(thiophene-quinoxaline) copolymers

2015 ◽  
Vol 6 (47) ◽  
pp. 8203-8213 ◽  
Author(s):  
Zi Qiao ◽  
Meng Wang ◽  
Mingzhi Zhao ◽  
ZhiGuo Zhang ◽  
Yongfang Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Photovoltaic Performance ◽  
Fluorine Substitution ◽  
Quinoxaline Ring

Three new conjugated polymers with or without fluorine substituents on quinoxaline ring were investigated in detail to assess the role of F in OPV performance.

Donor Conjugated Polymers with Polar Side Chain Groups: The Role of Dielectric Constant and Energetic Disorder on Photovoltaic Performance

2018 ◽  
Vol 28 (46) ◽  
pp. 1803418 ◽  
Author(s):  
Bing Xu ◽  
Xueping Yi ◽  
Tzu-Yen Huang ◽  
Zilong Zheng ◽  
Junxiang Zhang ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Conjugated Polymers ◽  
Photovoltaic Performance ◽  
Side Chain ◽  
Energetic Disorder

Enhancement of the performance of CdS/CdTe heterojunction solar cell using TiO2/ZnO bi-layer ARC and V2O5 BSF layers: A simulation approach

2020 ◽  
Vol 92 (2) ◽  
pp. 20901
Author(s):  
Abdul Kuddus ◽  
Md. Ferdous Rahman ◽  
Jaker Hossain ◽  
Abu Bakar Md. Ismail
Keyword(s):  
Solar Cell ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Heterojunction Solar Cell ◽  
Back Surface ◽  
Heterojunction Solar Cells

This article presents the role of Bi-layer anti-reflection coating (ARC) of TiO2/ZnO and back surface field (BSF) of V2O5 for improving the photovoltaic performance of Cadmium Sulfide (CdS) and Cadmium Telluride (CdTe) based heterojunction solar cells (HJSCs). The simulation was performed at different concentrations, thickness, defect densities of each active materials and working temperatures to optimize the most excellent structure and working conditions for achieving the highest cell performance using obtained optical and electrical parameters value from the experimental investigation on spin-coated CdS, CdTe, ZnO, TiO2 and V2O5 thin films deposited on the glass substrate. The simulation results reveal that the designed CdS/CdTe based heterojunction cell offers the highest efficiency, η of ∼25% with an enhanced open-circuit voltage, Voc of 0.811 V, short circuit current density, Jsc of 38.51 mA cm−2, fill factor, FF of 80% with bi-layer ARC and BSF. Moreover, it appears that the TiO2/ZnO bi-layer ARC, as well as ETL and V2O5 as BSF, could be highly promising materials of choice for CdS/CdTe based heterojunction solar cell.

Formation of Oriented Nanostructures from Single Molecules of Conjugated Polymers in Microdroplets of Solution:  The Role of Solvent

2004 ◽  
Vol 37 (16) ◽  
pp. 6132-6140 ◽  
Author(s):  
Pradeep Kumar ◽  
Adosh Mehta ◽  
Shannon M. Mahurin ◽  
Sheng Dai ◽  
Mark D. Dadmun ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Single Molecules ◽  
Role Of Solvent

Role of Surface Band Gap Widening in Cu(In, Ga)(Se, S)2 Thin-Films for the Photovoltaic Performance of ZnO/CdS/Cu(In, Ga)(Se, S)2 Heterojunction Solar Cells

2003 ◽  
Vol 763 ◽  
Author(s):  
U. Rau ◽  
M. Turcu
Keyword(s):  
Thin Films ◽  
Surface Layer ◽  
Solar Cells ◽  
Fermi Level ◽  
Band Gap ◽  
Photovoltaic Performance ◽  
Heterojunction Solar Cells ◽  
Fermi Level Pinning ◽  
Device Efficiency

AbstractNumerical simulations are used to investigate the role of the Cu-poor surface defect layer on Cu(In, Ga)Se2 thin-films for the photovoltaic performance of ZnO/CdS/Cu(In, Ga)Se2 heterojunction solar cells. We model the surface layer either as a material which is n-type doped, or as a material which is type-inverted due to Fermi-level pinning by donor-like defects at the interface with CdS. We further assume a band gap widening of this layer with respect to the Cu(In, Ga)Se2 bulk. This feature turns out to represent the key quality of the Cu(In, Ga)Se2 surface as it prevents recombination at the absorber/CdS buffer interface. Whether the type inversion results from n-type doping or from Fermi-level pinning is only of minor importance as long as the surface layer does not imply a too large number of excess defects in its bulk or at its interface with the normal absorber. With increasing number of those defects an n-type layer proofs to be less sensitive to material deterioration when compared to the type-inversion by Fermi-level pinning. For wide gap chalcopyrite solar cells the internal valence band offset between the surface layer and the chalcopyrite appears equally vital for the device efficiency. However, the unfavorable band-offsets of the ZnO/CdS/Cu(In, Ga)Se2 heterojunction limit the device efficiency because of the deterioration of the fill factor.

The Role of Fluorine Substitution in Biphenyl Methylene Imidazole-Type CYP17 Inhibitors for the Treatment of Prostate Carcinoma

ChemMedChem ◽  
2010 ◽  
Vol 5 (6) ◽  
pp. 899-910 ◽  
Author(s):  
Qingzhong Hu ◽  
Matthias Negri ◽  
Sureyya Olgen ◽  
Rolf W. Hartmann
Keyword(s):  
Prostate Carcinoma ◽  
Fluorine Substitution

scholarly journals The Role of the Side Chain on the Performance of N-type Conjugated Polymers in Aqueous Electrolytes

2018 ◽  
Vol 30 (9) ◽  
pp. 2945-2953 ◽  
Author(s):  
Alexander Giovannitti ◽  
Iuliana P. Maria ◽  
David Hanifi ◽  
Mary J. Donahue ◽  
Daniel Bryant ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Side Chain ◽  
Aqueous Electrolytes

scholarly journals Understanding the Role of π-Conjugated Polymers as Binders in Enabling Designs for High-Energy/High-Rate Lithium Metal Batteries

2021 ◽  
Author(s):  
Rodrigo Elizalde-Segovia ◽  
Pratyusha Das ◽  
Billal Zayat ◽  
AHAMED IRSHAD ◽  
Barry Thompson ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
High Energy ◽  
High Rate ◽  
Lithium Metal ◽  
Lithium Metal Batteries

Nanotechnology and Polymer Solar Cells

2014 ◽  
pp. 384-405
Author(s):  
Gavin Buxton
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Nanoscale Structures ◽  
Energy Technologies ◽  
Self Assembling ◽  
Polymer Photovoltaics ◽  
Energy Needs ◽  
Novel Applications

In response to environmental concerns there is a drive towards developing renewable, and cleaner, energy technologies. Solar cells, which harvest energy directly from sunlight, may satisfy future energy requirements, but photovoltaic devices are currently too expensive to compete with existing fossil fuel based technologies. Polymer solar cells, on the other hand, are cheaper to produce than conventional inorganic solar cells and can be processed at relatively low temperatures. Furthermore, polymer solar cells can be fabricated on surfaces of arbitrary shape and flexibility, paving the way to a range of novel applications. Therefore, polymer solar cells are likely to play an important role in addressing, at least in some small part, man’s future energy needs. Here, the physics of polymer photovoltaics are reviewed, with particular emphasis on the computational tools which can be used to investigate these systems. In particular, the authors discuss the application of nanotechnology in self-assembling complex nanoscale structures which can be tailored to optimize photovoltaic performance. The role of computer simulations, in correlating these intricate structures with their performance, can not only reveal interesting new insights into current devices, but also elucidate potentially new systems with more optimized nanostructures.

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