Toward Efficient Charge Collection and Light Absorption: A Perspective of Light Trapping for Advanced Photoelectrodes

2019 ◽  
Vol 123 (31) ◽  
pp. 18753-18770 ◽  
Author(s):  
Weitao Qiu ◽  
Shuang Xiao ◽  
Yexiang Tong ◽  
Shihe Yang
Keyword(s):  
Light Absorption ◽  
Light Trapping ◽  
Charge Collection ◽  
Efficient Charge

Reinforcing the Built-In Field for Efficient Charge Collection in Polymer Solar Cells

2018 ◽  
Vol 28 (10) ◽  
pp. 1705079 ◽  
Author(s):  
Jong-Hoon Lee ◽  
Song Yi Jeong ◽  
Geunjin Kim ◽  
Byoungwook Park ◽  
Junghwan Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Charge Collection ◽  
Efficient Charge

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.

scholarly journals Efficient solar-driven water splitting by nanocone BiVO4-perovskite tandem cells

2016 ◽  
Vol 2 (6) ◽  
pp. e1501764 ◽  
Author(s):  
Yongcai Qiu ◽  
Wei Liu ◽  
Wei Chen ◽  
Wei Chen ◽  
Guangmin Zhou ◽  
...  
Keyword(s):  
Water Splitting ◽  
Light Absorption ◽  
Diffusion Length ◽  
Narrow Band ◽  
Low Cost ◽  
High Water ◽  
Hydrogen Electrode ◽  
Efficient Charge ◽  
Multiple Light Scattering ◽  
Pec Water Splitting

Bismuth vanadate (BiVO4) has been widely regarded as a promising photoanode material for photoelectrochemical (PEC) water splitting because of its low cost, its high stability against photocorrosion, and its relatively narrow band gap of 2.4 eV. However, the achieved performance of the BiVO4 photoanode remains unsatisfactory to date because its short carrier diffusion length restricts the total thickness of the BiVO4 film required for sufficient light absorption. We addressed the issue by deposition of nanoporous Mo-doped BiVO4 (Mo:BiVO4) on an engineered cone-shaped nanostructure, in which the Mo:BiVO4 layer with a larger effective thickness maintains highly efficient charge separation and high light absorption capability, which can be further enhanced by multiple light scattering in the nanocone structure. As a result, the nanocone/Mo:BiVO4/Fe(Ni)OOH photoanode exhibits a high water-splitting photocurrent of 5.82 ± 0.36 mA cm−2 at 1.23 V versus the reversible hydrogen electrode under 1-sun illumination. We also demonstrate that the PEC cell in tandem with a single perovskite solar cell exhibits unassisted water splitting with a solar-to-hydrogen conversion efficiency of up to 6.2%.

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.

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