Optimization of Microtextured Light-Management Films for Enhanced Light Trapping in Organic Solar Cells Under Perpendicular and Oblique Illumination Conditions

We report a novel light management approach based on solution-processed nanowire (NW) coating for enhancing organic solar cell efficiency. A titanium dioxide (TiO2) NW dispersion was produced by electrospinning. The coatings with various coverage fractions were fabricated by a simple solution casting of a TiO2NW dispersion. Reduced reflectivity was observed for the NW-coated glass slide. The bulk-heterojunction organic solar cells with the NW coating showed improved power conversion efficiencies (PCEs) due to their antireflection and light trapping effects in the active layer. In addition, the PCE of the cell with the NW coating was improved compared with that without the NW coating for incident angles above 70° (increased by a maximum of 51.6% at an incident angle of 85°). These results indicate that solution-processed NW coating is a promising light management approach easily scalable and applicable to a wide range of devices, including solar cells.

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Highly efficient organic solar cells enabled by a porous ZnO/PEIE electron transport layer with enhanced light trapping

Science China Materials ◽

10.1007/s40843-020-1508-7 ◽

2020 ◽

Vol 64 (4) ◽

pp. 808-819

Author(s):

Shenya Qu ◽

Jiangsheng Yu ◽

Jinru Cao ◽

Xin Liu ◽

Hongtao Wang ◽

...

Keyword(s):

Solar Cells ◽

Electron Transport ◽

Organic Solar Cells ◽

Light Trapping ◽

Transport Layer ◽

Electron Transport Layer ◽

Highly Efficient

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New Light Management Concepts for Thin-Film Silicon Solar Cells

MRS Proceedings ◽

10.1557/proc-1101-kk06-03 ◽

2008 ◽

Vol 1101 ◽

Cited By ~ 1

Author(s):

Helmut Stiebig ◽

Christian Haase ◽

Silvia Jorke ◽

Philipp Obermeyer ◽

Etienne Moulin ◽

...

Keyword(s):

Thin Film ◽

Solar Cells ◽

Metallic Nanoparticles ◽

Light Propagation ◽

Light Trapping ◽

Cell Structure ◽

Thin Film Silicon ◽

Diffractive Element ◽

Management Concepts ◽

Light Management

AbstractAn efficient utilization of the sun spectrum is a key issue in the field of thin-film silicon solar cell technology. Therefore, different strategies for enhanced light absorption were presented in the last years. In order to achieve a better understanding of light scattering at nanotextured interfaces the optical properties of a large variety of samples were studied. The angle resolved scattering behavior was analyzed by means of a developed ray tracing model. As an alternative to randomly textured substrates, the influence of periodically textured substrates on the light propagation in solar cells was experimentally and numerically studied with respect to improved light in-coupling and light trapping. Based on a deeper understanding a new tandem cell structure with a diffractive element between the top and bottom cell was developed. Finally, the influence of metallic nanoparticles on the cell performance was studied.

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