scholarly journals Two-Dimensional Modeling of Silicon Nanowires Radial Core-Shell Solar Cells

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Qiang Zeng ◽  
Na Meng ◽  
Yulong Ma ◽  
Han Gu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Silicon Nanowires ◽  
Light Absorption ◽  
Low Cost ◽  
Light Trapping ◽  
Electrical Performance ◽  
Core Shell ◽  
Two Dimensional ◽  
Strong Light ◽  
The Impact

Silicon nanowires radial core-shell solar cells have recently attracted significant attention as promising candidates for low cost photovoltaic application, benefit from its strong light trapping, and short radial carrier collection distances. In order to establish optics and electricity improvement, a two-dimensional model based on Shockley-Read-Hall recombination modes has been carried out for radial core-shell junction nanowires solar cell combined with guided resonance modes of light absorption. The impact of SiNWs diameter and absorption layer thickness on device electrical performance based on a fixed nanowires height and diameter-over-periodicity were investigated under illumination. The variation in quantum efficiency indicated that the performance is limited by the mismatch between light absorption and carriers’ collection length.

scholarly journals Fabrication and Photovoltaic Characteristics of Coaxial Silicon Nanowire Solar Cells Prepared by Wet Chemical Etching

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Chien-Wei Liu ◽  
Chin-Lung Cheng ◽  
Bau-Tong Dai ◽  
Chi-Han Yang ◽  
Jun-Yuan Wang
Keyword(s):  
Solar Cells ◽  
Silicon Nanowires ◽  
Chemical Etching ◽  
Low Cost ◽  
Light Trapping ◽  
Silicon Nanowire ◽  
Great Promise ◽  
Etching Time ◽  
Wet Chemical ◽  
Wet Chemical Etching

Nanostructured solar cells with coaxial p-n junction structures have strong potential to enhance the performances of the silicon-based solar cells. This study demonstrates a radial junction silicon nanowire (RJSNW) solar cell that was fabricated simply and at low cost using wet chemical etching. Experimental results reveal that the reflectance of the silicon nanowires (SNWs) declines as their length increases. The excellent light trapping was mainly associated with high aspect ratio of the SNW arrays. A conversion efficiency of ∼7.1% and an external quantum efficiency of ∼64.6% at 700 nm were demonstrated. Control of etching time and diffusion conditions holds great promise for the development of future RJSNW solar cells. Improving the electrode/RJSNW contact will promote the collection of carries in coaxial core-shell SNW array solar cells.

scholarly journals Soft-Microstructured Transparent Electrodes for Photonic-Enhanced Flexible Solar Cells

Micro ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 215-227
Author(s):  
Jenny L. N. Boane ◽  
Pedro Centeno ◽  
Ana Mouquinho ◽  
Miguel Alexandre ◽  
Tomás Calmeiro ◽  
...  
Keyword(s):  
Solar Cells ◽  
Sheet Resistance ◽  
Indium Tin Oxide ◽  
Low Cost ◽  
Light Trapping ◽  
Transparent Electrodes ◽  
Strong Light ◽  
Resistance Reduction ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Microstructured transparent conductive oxides (TCOs) have shown great potential as photonic electrodes in photovoltaic (PV) applications, providing both optical and electrical improvements in the solar cells’ performance due to: (1) strong light trapping effects that enhance broadband light absorption in PV material and (2) the reduced sheet resistance of the front illuminated contact. This work developed a method for the fabrication and optimization of wavelength-sized indium zinc oxide (IZO) microstructures, which were soft-patterned on flexible indium tin oxide (ITO)-coated poly(ethylene terephthalate) (PET) substrates via a simple, low-cost, versatile, and highly scalable colloidal lithography process. Using this method, the ITO-coated PET substrates patterned with IZO micro-meshes provided improved transparent electrodes endowed with strong light interaction effects—namely, a pronounced light scattering performance (diffuse transmittance up to ~50%). In addition, the photonic-structured IZO mesh allowed a higher volume of TCO material in the electrode while maintaining the desired transparency, which led to a sheet resistance reduction (by ~30%), thereby providing further electrical benefits due to the improvement of the contact conductance. The results reported herein pave the way for a new class of photonic transparent electrodes endowed with mechanical flexibility that offer strong potential not only as advanced front contacts for thin-film bendable solar cells but also for a much broader range of optoelectronic applications.

A wrinkled structure with broadband and omnidirectional light-trapping abilities for improving the performance of organic solar cells with low defect density

Nanoscale ◽  
2019 ◽  
Vol 11 (46) ◽  
pp. 22467-22474 ◽  
Author(s):  
Kong Liu ◽  
Yang Sun ◽  
Qicong Li ◽  
Cheng Yang ◽  
Muhammad Azam ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Light Absorption ◽  
Defect Density ◽  
Light Trapping ◽  
Transport Efficiency ◽  
Wrinkled Structure

A wrinkled structure could enhance omnidirectional light absorption in the organic active layer and charge transport efficiency at the interface.

One-step solvothermal fabrication of Cu@PANI core–shell nanospheres for hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 22055-22064 ◽  
Author(s):  
Ting Wang ◽  
Dan Wu ◽  
Youliang Wang ◽  
Tingbo Huang ◽  
Gary Histand ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Light Absorption ◽  
Good Stability ◽  
Core Shell ◽  
Electron Hole ◽  
Facile Hydrothermal Method ◽  
Strong Light ◽  
Efficient Separation ◽  
One Step

Cu@PANI core–shell nanospheres synthesized by a facile hydrothermal method exhibit strong light absorption, good stability and efficient separation of photo-generated electron–hole pairs.

Ferromagnetism in 2D organic iron hemoglobin crystals based on nitrogenated conjugated micropore materials

2019 ◽  
Vol 21 (46) ◽  
pp. 25820-25825
Author(s):  
Artem Pimachev ◽  
Robert D. Nielsen ◽  
Anri Karanovich ◽  
Yuri Dahnovsky
Keyword(s):  
Solar Cells ◽  
Hydrogen Storage ◽  
Low Cost ◽  
Ferromagnetic Semiconductor ◽  
Two Dimensional

We study an environmentally stable, low-cost two-dimensional ferromagnetic semiconductor with applications in biomedicine, solar cells, spintronics, and hydrogen storage.

Radial p-n Junction Solar Cells by Core-Shell Silicon Nanowire Arrays

2012 ◽  
Vol 1302 ◽  
Author(s):  
Tai-Yuan Huang ◽  
Ta-Jen Yen
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Effective Medium Theory ◽  
Low Cost ◽  
Silicon Nanowire ◽  
Diffusion Path ◽  
Absorption Efficiency ◽  
Core Shell ◽  
Sinw Array ◽  
Single Crystalline

ABSTRACTWe first fabricated a p-type single-crystalline SiNW array as the core by statistic electroless metal deposition (SEMD) method[1]. This structure exhibits per excellent absorption efficiency without increasing the diffusion path, indicating 1.75 times greater performance than Si-based planar solar cells under the same condition[2]. Next, we employed a method of spin-on dopant (SOD) to fabricate an n-type layer as an external thin shell, which benefits to decouple the absorption of light from charge transport by allowing lateral diffusion of minority carriers to the p-n junction rather than many microns away as in Si bulk solar cells, and is suitable for our SiNW array with a hydrophilic surface. Finally, our SiNW-based solar cell possesses strong broadband absorption and low reflection from visible light to near IR, in which the highly light trapping mechanism stems from the effective medium theory (EMT) to demonstrate only less than 3% of total reflectance in the range of 500-1100 nm. It also shows conversion efficiency improvement of 20% compared with the planar single-crystalline Si solar cell by the same fabrication processes. The proposed novel photovoltaic device by our core-shell SiNW array revolutionizes the current architecture of solar cells, promising niche points of (1) better absorption, (2) self-antireflection, and (3) low-cost process.

Light-trapping in Thin Film Silicon Solar Cells with a Combination of Periodic and Randomly Textured Back-reflectors

2012 ◽  
Vol 1426 ◽  
pp. 117-123 ◽  
Author(s):  
Sambit Pattnaik ◽  
Nayan Chakravarty ◽  
Rana Biswas ◽  
D. Slafer ◽  
Vikram Dalal
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Light Absorption ◽  
Nanoimprint Lithography ◽  
Light Trapping ◽  
Silicon Solar Cells ◽  
Long Wavelength ◽  
Thin Film Silicon ◽  
Back Reflectors ◽  
Back Reflector

ABSTRACTLight trapping is essential to harvest long wavelength red and near-infrared photons in thin film silicon solar cells. Traditionally light trapping has been achieved with a randomly roughened Ag/ZnO back reflector, which scatters incoming light uniformly through all angles, and enhances currents and cell efficiencies over a flat back reflector. A new approach using periodically textured photonic-plasmonic arrays has been recently shown to be very promising for harvesting long wavelength photons, through diffraction of light and plasmonic light concentration. Here we investigate the combination of these two approaches of random scattering and plasmonic effects to increase cell performance even further. An array of periodic conical back reflectors was fabricated by nanoimprint lithography and coated with Ag. These back reflectors were systematically annealed to generate different amounts of random texture, at smaller spatial scales, superimposed on a larger scale periodic texture. nc-Si solar cells were grown on flat, periodic photonic-plasmonic substrates, and randomly roughened photonic-plasmonic substrates. There were large improvements (>20%) in the current and light absorption of the photonic-plasmonic substrates relative to flat. The additional random features introduced on the photonic-plasmonic substrates did not improve the current and light absorption further, over a large range of randomization features.

scholarly journals Disorder Improves Light Absorption in Thin Film Silicon Solar Cells with Hybrid Light Trapping Structure

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yanpeng Shi ◽  
Xiaodong Wang ◽  
Fuhua Yang
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Periodic Structures ◽  
Light Trapping ◽  
Random Effect ◽  
Large Field ◽  
Silicon Solar Cells ◽  
Trapping Effect ◽  
Thin Film Silicon ◽  
The Impact

We present a systematic simulation study on the impact of disorder in thin film silicon solar cells with hybrid light trapping structure. For the periodical structures introducing certain randomness in some parameters, the nanophotonic light trapping effect is demonstrated to be superior to their periodic counterparts. The nanophotonic light trapping effect can be associated with the increased modes induced by the structural disorders. Our study is a systematic proof that certain disorder is conceptually an advantage for nanophotonic light trapping concepts in thin film solar cells. The result is relevant to the large field of research on nanophotonic light trapping which currently investigates and prototypes a number of new concepts including disordered periodic and quasiperiodic textures. The random effect on the shape of the pattern (position, height, and radius) investigated in this paper could be a good approach to estimate the influence of experimental inaccuracies for periodic or quasi-periodic structures.

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