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Article

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

CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa, and CEMOP/UNINOVA, 2829-516 Caparica, Portugal
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Micro 2021, 1(2), 215-227; https://doi.org/10.3390/micro1020016
Received: 3 August 2021 / Revised: 22 September 2021 / Accepted: 5 October 2021 / Published: 11 October 2021
(This article belongs to the Section Microscale Materials Science)
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. View Full-Text
Keywords: photovoltaics; photonics; colloidal lithography; transparent microstructured electrodes photovoltaics; photonics; colloidal lithography; transparent microstructured electrodes
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MDPI and ACS Style

Boane, J.L.N.; Centeno, P.; Mouquinho, A.; Alexandre, M.; Calmeiro, T.; Fortunato, E.; Martins, R.; Mendes, M.J.; Águas, H. Soft-Microstructured Transparent Electrodes for Photonic-Enhanced Flexible Solar Cells. Micro 2021, 1, 215-227. https://doi.org/10.3390/micro1020016

AMA Style

Boane JLN, Centeno P, Mouquinho A, Alexandre M, Calmeiro T, Fortunato E, Martins R, Mendes MJ, Águas H. Soft-Microstructured Transparent Electrodes for Photonic-Enhanced Flexible Solar Cells. Micro. 2021; 1(2):215-227. https://doi.org/10.3390/micro1020016

Chicago/Turabian Style

Boane, Jenny L. N., Pedro Centeno, Ana Mouquinho, Miguel Alexandre, Tomás Calmeiro, Elvira Fortunato, Rodrigo Martins, Manuel J. Mendes, and Hugo Águas. 2021. "Soft-Microstructured Transparent Electrodes for Photonic-Enhanced Flexible Solar Cells" Micro 1, no. 2: 215-227. https://doi.org/10.3390/micro1020016

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