Computational predictions of adaptive aromaticity for the design of singlet fission materials

2022 ◽  
Author(s):  
Lu Lin ◽  
Jun Zhu
Keyword(s):  
Conversion Efficiency ◽  
Singlet Fission ◽  
Photovoltaic Conversion ◽  
Photovoltaic Conversion Efficiency ◽  
Computational Predictions

Singlet fission has attracted extensive attention from experimentalists and theoreticians due to its ability to improve photovoltaic conversion efficiency. Still, designing singlet fission materials remains challenging. In this work, we...

scholarly journals Antireflection Improvement and Junction Quality Optimization of Si/PEDOT:PSS Solar Cell with the Introduction of Dopamine@Graphene

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5986
Author(s):  
Tao Chen ◽  
Hao Guo ◽  
Leiming Yu ◽  
Tao Sun ◽  
Anran Chen ◽  
...  
Keyword(s):  
Solar Cell ◽  
Conversion Efficiency ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrochemical Impedance Spectra ◽  
Solar Cell Performance ◽  
Photovoltaic Conversion ◽  
Photovoltaic Conversion Efficiency

Si/PEDOT: PSS solar cell is an optional photovoltaic device owing to its promising high photovoltaic conversion efficiency (PCE) and economic manufacture process. In this work, dopamine@graphene was firstly introduced between the silicon substrate and PEDOT:PSS film for Si/PEDOT: PSS solar cell. The dopamine@graphene was proved to be effective in improving the PCE, and the influence of mechanical properties of dopamine@graphene on solar cell performance was revealed. When dopamine@graphene was incorporated into the cell preparation, the antireflection ability of the cell was enhanced within the wavelength range of 300~450 and 650~1100 nm. The enhanced antireflection ability would benefit amount of the photon-generated carriers. The electrochemical impedance spectra test revealed that the introduction of dopamine@graphene could facilitate the separation of carriers and improve the junction quality. Thus, the short-circuit current density and fill factor were both promoted, which led to the improved PCE. Meanwhile, the influence of graphene concentration on device performances was also investigated. The photovoltaic conversion efficiency would be promoted from 11.06% to 13.15% when dopamine@graphene solution with concentration 1.5 mg/mL was applied. The achievements of this study showed that the dopamine@graphene composites could be an useful materials for high-performance Si/PEDOT:PSS solar cells.

Improving the Cu₂ZnSn(S,Se)₄-Based Photovoltaic Conversion Efficiency by Back-Contact Modification

2021 ◽  
pp. 1-5
Author(s):  
Brajendra S. Sengar ◽  
Vivek Garg ◽  
Gaurav Siddharth ◽  
Amitesh Kumar ◽  
Sushil Kumar Pandey ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Back Contact ◽  
Photovoltaic Conversion ◽  
Photovoltaic Conversion Efficiency

Large Pore Nanocrystalline TiO2 Films for Quasi-Solid State Dye-Sensitized Solar Cells

2013 ◽  
Vol 662 ◽  
pp. 177-181
Author(s):  
Jian Gao ◽  
Hao Ran Li ◽  
Hua Rong ◽  
Yu Hua Dai
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Photovoltaic Conversion ◽  
Photovoltaic Conversion Efficiency ◽  
Large Pore ◽  
Vis Spectroscopy ◽  
Sensitized Solar Cells

Photoelectrodes of mixed polymethylmethacrylate (PMMA) and TiO2paste with different ratios were fabricated and studied for improved photovoltaic conversion efficiency in quasi-solid state dye-sensitized solar cells(QS-DSCs). The large pore nanocrystalline TiO2films were prepared by the doctor blade method and charicterized by SEM and UV-Vis spectroscopy. SEM images show that large pores have been formed in the TiO2films. The transmittance of the films increased with an increase amount of PMMA, while the light-absorption decreased when the films covered by dyes. I-V curves show that a relatively high photovoltaic conversion efficiency of 2.1%~2.26% was achieved when the PMMA/ TiO2paste weight ratio was in the range of 1:25~1:35 under AM 1.5 illumination at 100mW/cm2.

Sign in / Sign up

Export Citation Format

Share Document