scholarly journals Efficiency Enhancement of Gallium Arsenide Photovoltaics Using Solution-Processed Zinc Oxide Nanoparticle Light Scattering Layers

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Yangsen Kang ◽  
Dong Liang ◽  
Saahil Mehra ◽  
Yijie Huo ◽  
Yusi Chen ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
Zinc Oxide ◽  
Solar Cell ◽  
Light Scattering ◽  
Near Infrared ◽  
Short Circuit ◽  
Surface Texturing ◽  
Short Circuit Current ◽  
Zno Films ◽  
Zno Nanoparticle

We demonstrate a high-throughput, solution-based process for subwavelength surface texturing of a III-V compound solar cell. A zinc oxide (ZnO) nanoparticle ink is spray-coated directly on top of a gallium arsenide (GaAs) solar cell. The nanostructured ZnO films have demonstrated antireflection and light scattering properties over the visible/near-infrared (NIR) spectrum. The results show a broadband spectral enhancement of the solar cell external quantum efficiency (EQE), a 16% enhancement of short circuit current, and a 10% increase in photovoltaic efficiency.

A Solar Cell Based on a Hybrid Film of P3HT and Magic Cubic-Like PbS

2012 ◽  
Vol 567 ◽  
pp. 236-239
Author(s):  
Peng Wang ◽  
An Mei Wang ◽  
Zhen Hua Zhang ◽  
Li Bo Fan ◽  
Yan Lei ◽  
...  
Keyword(s):  
Solar Cell ◽  
Near Infrared ◽  
Hybrid Film ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Special Treatment ◽  
Ito Glass ◽  
Coating Method

Lead sulfide (PbS) magic cubes were prepared by a simple hydrothermal method without any organic solvent. The product was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and absorption spectrum. A solar cell, with a structure of Al/P3HT:PbS/PEDOT:PSS/ITO/Glass, was made. By a spin coating method, a hybrid film of poly(3-hexylthiophene) (P3HT) and PbS was prepared on the PEDOT:PSS layer. The solar cells are photosensitive in a large spectral range (visible and near infrared regions). The cells, with the area of 0.15 cm2 without any special treatment, have shown the values of open-circuit voltage (Voc) of 242 mV, short circuit current (Jsc) of 0.01 mA/cm2, energy conversion efficiency (η) of 0.01 % and fill factor (FF) of 0.31 under illumination intensity of 100 mW/cm2.

scholarly journals Cu(In,Ga)Se2 Solar Cells Integrated with Subwavelength Structured Cover Glass Fabricated by One-Step Self-Masked Etching

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 877
Author(s):  
Ho-Jung Jeong ◽  
Ye-Chan Kim ◽  
Sung-Tae Kim ◽  
Min-Ho Choi ◽  
Young-Hyun Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Near Infrared ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Subwavelength Structures ◽  
Cover Glass ◽  
Cigs Thin Film ◽  
Average Transmittance ◽  
One Step

We report an anti-reflective cover glass for Cu(In,Ga)Se2 (CIGS) thin film solar cells. Subwavelength structures (SWSs) were fabricated on top of a cover glass using one-step self-masked etching. The etching method resulted in dense whiskers with high aspect ratio. The produced structure exhibited excellent anti-reflective properties over a broad wavelength range, from the ultraviolet to the near infrared. Compared to a flat-surface glass, the average transmittance of the glass integrated with the SWSs improved from 92.4% to 95.2%. When the cover glass integrated with the SWSs was mounted onto the top of a CIGS device, the short-circuit current and the efficiency of the solar cell were enhanced by 4.38 and 6%, respectively, compared with a CIGS solar cell without cover glass.

A Solar Cell Made by a Hybrid Film of P3HT and Cubic-Like PbS

2012 ◽  
Vol 479-481 ◽  
pp. 166-169
Author(s):  
Peng Wang ◽  
Li Bo Fan ◽  
Zhen Hua Zhang ◽  
Yan Lei ◽  
Yan Ge Zhang ◽  
...  
Keyword(s):  
Solar Cell ◽  
Large Scale ◽  
Near Infrared ◽  
Hybrid Film ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Special Treatment ◽  
X Ray Diffraction ◽  
Ft Ir

Cubic-like lead sulfide (PbS) films were in situ fabricated on lead (Pb) foil on a large scale by solvothermal method. Ethanol and ethylenediamine were used as the solvent. The films were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), absorption and the Fourier transformation-infrared (FT-IR) spectra. A solar cell was made by the hybrid film of P3HT and cubic-like PbS. The solar cells are photosensitive in a large spectral range (visible and near infrared regions). The cell with the area of 0.20 cm2 without any special treatment has shown the values of open-circuit voltage (Voc) of 250 mV and short circuit current (Jsc) of 0.01 mA/cm2 with the efficiency of 0.01 % and the fill factor (FF) is 0.36 under illumination intensity of 100 mW/cm2.

Light Trapping in Thin-film μc-Si:H Solar Cells using Self-ordered 2D Grating Reflector

2009 ◽  
Vol 1153 ◽  
Author(s):  
Hitoshi Sai ◽  
Yoshiaki Kanamori ◽  
Michio Kondo
Keyword(s):  
Light Scattering ◽  
Near Infrared ◽  
Light Trapping ◽  
Spectral Response ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Infrared Region ◽  
Short Circuit Current Density ◽  
Rear Side ◽  
Patterned Substrates

AbstractEffect of back reflectors on light trapping in μc-Si:H cells has been investigated with self-ordered Al substrates obtained by anodic oxidation. With increasing the period of the patterned substrates from 0 to 1.1 μm, 1-μm-thick μc-Si:H cells on the patterned substrates have shown a significant enhancement of spectral response in the near infrared region, giving an increment of the short circuit current density from 18 to 24 mA/cm2. This enhanced light trapping effect are attributed to the improved reflectivity of the rear side and effective light scattering at the front side, as well as light scattering at the rear side.

Technologies to Reduce Optical Losses of Silicon Solar Cells

2014 ◽  
Vol 953-954 ◽  
pp. 91-94
Author(s):  
Yu Qin Gu ◽  
Chun Rong Xue ◽  
Ming Liang Zheng
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Trapping ◽  
Short Circuit ◽  
Surface Texturing ◽  
Short Circuit Current ◽  
Optical Path Length ◽  
Silicon Solar Cells ◽  
Optical Losses ◽  
Top Contact

Optical losses chiefly effect the power from a solar cell by lowering the short-circuit current. There are a number of ways to reduce the optical losses, which includes top contact coverage of the cell surface can be minimized, anti-reflection coatings can be used on the top surface of the cell, reflection can be reduced by surface texturing, and the optical path length in the solar cell may be increased by a combination of surface texturing and light trapping. This work discusses all of the methods to reduce optical losses of silicon solar cells. Surface texturing, either in combination with an anti-reflection coating or by itself, can be used to minimize reflection, but the large reflection loss can be reduced significantly via a suitable anti-reflecting coatings. Significant improvement of the short circuit current after light trapping design was observed. In addition to these methods, top contact design of silicon solar cells is important. The design of the top contact involves the minimization of the finger and busbar resistance, and the overall reduction of losses associated with the top contact.

A Heterojunction Film Solar Cell of Glass/ITO/CdS/PbS/Al

2012 ◽  
Vol 569 ◽  
pp. 176-179
Author(s):  
Peng Wang ◽  
Li Bo Fan ◽  
Li Juan Sun ◽  
Zhen Hua Zhang ◽  
Xin Bing Zhu ◽  
...  
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Near Infrared ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
High Energy ◽  
Open Circuit ◽  
Special Treatment ◽  
Cds Film

A film solar cell was made with a structure of Glass/ITO/CdS/PbS/Al. CdS film was obtained by thermal evaporation. PbS film was prepared by a simple solid-solid reaction. The solar cells are photosensitive in a large spectral range (extending from near infrared to high energy side regions). The cell with the area of 0.15 cm2 without any special treatment has shown the values of open-circuit voltage (Voc) of 138 mV and short circuit current (Jsc) of 0.01 mA/cm2 with the efficiency of 0.33 % and the fill factor (FF) is 0.26 under illumination intensity of 100 mW/cm2.

Optical Absorption Enhancement in Polymer BHJ thin Film Using Ag Nanostructures: A Simulation Study

2020 ◽  
Vol 16 (4) ◽  
pp. 556-567
Author(s):  
Asma Khalil ◽  
Zubair Ahmad ◽  
Farid Touati ◽  
Mohamed Masmoudi
Keyword(s):  
Absorption Spectrum ◽  
Solar Cell ◽  
Methyl Ester ◽  
Butyric Acid ◽  
Organic Solar Cell ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

Background: The photo-absorption and light trapping through the different layers of the organic solar cell structures are a growing concern now-a-days as it affects dramatically the overall efficiency of the cells. In fact, selecting the right material combination is a key factor in increasing the efficiency in the layers. In addition to good absorption properties, insertion of nanostructures has been proved in recent researches to affect significantly the light trapping inside the organic solar cell. All these factors are determined to expand the absorption spectrum and tailor it to a wider spectrum. Objective: The purpose of this investigation is to explore the consequence of the incorporation of the Ag nanostructures, with different sizes and structures, on the photo absorption of the organic BHJ thin films. Methods: Through a three-dimensional Maxwell solver software, Lumerical FDTD, a simulation and comparison of the optical absorption of the three famous organic materials blends poly(3- hexylthiophene): phenyl C71 butyric acid methyl ester (P3HT:PCBM), poly[N-9″-heptadecanyl-2,7- carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)]: phenyl C71 butyric acid methyl ester (PCDTBT:PCBM) and poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt- 4,7-(2,1,3-benzothiadiazole)]: phenyl C71 butyric acid methyl ester (PCDPDTBT:PCBM) has been conducted. Furthermore, FDTD simulation study of the incorporation of nanoparticles structures with different sizes, in different locations and concentrations through a bulk heterojunction organic solar cell structure has also been performed. Results: It has been demonstrated that embedding nanostructures in different locations of the cell, specifically in the active layer and the hole transporting layer had a considerable effect of widening the absorption spectrum and increasing the short circuit current. The effect of incorporation the nanostructures in the active layer has been proved to be greater than in the HTL. Furthermore, the comparison results showed that, PCDTBT:PCBM is no more advantageous over P3HT:PCBM and PCPDTBT:PCBM, and P3HT:PCBM took the lead and showed better performance in terms of absorption spectrum and short circuit current value. Conclusion: This work revealed the significant effect of size, location and concentration of the Ag nanostructures while incorporated in the organic solar cell. In fact, embedding nanostructures in the solar cell widen the absorption spectrum and increases the short circuit current, this result has been proven to be significant only when the nanostructures are inserted in the active layer following specific dimensions and structures.

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.

High short-circuit current density in a non-toxic Bi2S3 Quantum dot sensitized solar cell

2021 ◽  
pp. 100783
Author(s):  
Christopher Rosiles-Perez ◽  
Sirak Sidhik ◽  
Luis Ixtilico-Cortés ◽  
Fernando Robles-Montes ◽  
Tzarara López-Luke ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
Current Density ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density
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