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Open AccessArticle

Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation

1
Applied Optics Complutense Group, Faculty of Optics and Optometry, University Complutense of Madrid, Arcos de Jalon, 118, 28037 Madrid, Spain
2
Physics Department, Faculty of Science, Minia University, El Minia 61519, Egypt
3
Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, 28933 Madrid, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(22), 4850; https://doi.org/10.3390/app9224850
Received: 27 October 2019 / Revised: 8 November 2019 / Accepted: 9 November 2019 / Published: 13 November 2019
This work reports on a computational analysis of how a modified perovskite cell can work as a refractometric sensor by generating surface plasmon resonances at its front surface. Metal-dielectric interfaces are necessary to excite plasmonic resonances. However, if the transparent conductor (ITO) is replaced by a uniform metal layer, the optical absorption at the active layer decreases significantly. This absorption enhances again when the front metallic surface is nanostructured, adding a periodic extruded array of high aspect-ratio dielectric pyramids. This relief excites surface plasmon resonances through a grating coupling mechanism with the metal surface. Our design allows a selective absorption in the active layer of the cell with a spectral response narrower than 1 nm. The photo-current generated by the cells becomes the signal of the sensor. The device employs an opto-electronic interrogation method, instead of the well-known spectral acquisition scheme. The sensitivity and figure of merit (FOM) parameters applicable to refractometric sensors were adapted to this new situation. The design has been customized to sense variations in the index of refraction of air between 1.0 and 1.1. The FOM reaches a maximum value of 1005 RIU 1 , which is competitive when considering some other advantages, as the easiness of the acquisition signal procedure and the total cost of the sensing system. All the geometrical and material parameters included in our design were selected considering the applicable fabrication constrains. View Full-Text
Keywords: perovskite ITO free; opto-electronic interrogation; optical sensor; surface plasmon resonance perovskite ITO free; opto-electronic interrogation; optical sensor; surface plasmon resonance
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MDPI and ACS Style

H. Elshorbagy, M.; Cuadrado, A.; Alda, J. Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation. Appl. Sci. 2019, 9, 4850. https://doi.org/10.3390/app9224850

AMA Style

H. Elshorbagy M, Cuadrado A, Alda J. Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation. Applied Sciences. 2019; 9(22):4850. https://doi.org/10.3390/app9224850

Chicago/Turabian Style

H. Elshorbagy, Mahmoud; Cuadrado, Alexander; Alda, Javier. 2019. "Narrow Absorption in ITO-Free Perovskite Solar Cells for Sensing Applications Analyzed through Electromagnetic Simulation" Appl. Sci. 9, no. 22: 4850. https://doi.org/10.3390/app9224850

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