Organic plasma polymer for improving the stability of perovskite solar cells
Jose Obrero-Perez a, Lidia Contreras-Bernal a, Fernando Nuñez-Galvez a, Javier Castillo-Seoane a, Karen Valadez-Villlobos b, Francisco J. Aparicui a c, Juan A. Anta b, Ana Borrás a, Juan R. Sanchez-Valencia a, Angel Barranco a
a Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) C/Americo Vespucio 49, E-41092 Seville, Spain
b Área de Química Física Universidad Pablo de Olavide E-41013 Seville, Spain
c Departamento de Física Aplicada I, Escuela Politécnica Superior, Universidad de Sevilla, c/ Virgen de África 7, E-41011 Seville, Spain
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Oral, Lidia Contreras-Bernal, presentation 055
Publication date: 20th April 2022

Solar and indoor light energies are one of the most promising sources for developing the wireless technology that captures environmental energy. About this, organometallic halide perovskite (OMHP) materials have attracted the attention of the solar energy research field due to their excellent optoelectronic and photovoltaic (PV) properties. However, the stability of the OMHP material to environmental conditions still needs to be optimized before integrating such devices both into single-source harvesters in one device, or even combining them with other technologies - piezoelectricity, triboelectricity - to simultaneously convert several energy sources into electricity.

With this background, during the last years, we have focused on developing organic plasma polymers that mainly improve the stability of OMHP solar cells. [1]

Herein, an ultrathin plasma polymer has been used as an encapsulation material for OMHP solar cells. The encapsulation method, that does not affect the PV performance, is carried out at room temperature by the remote plasma-assisted vacuum (RPAV) technique. The encapsulated devices show a significant increase in stability in humid air (RH˃85%) and even keep their PV performance intact within the first 60 seconds immersed in liquid water.

In addition, this plasma polymer is also positioned as a promising interlayer passivation material for OMHP solar cells. A higher fill factor and PV parameter reproducibility are obtained for solar devices incorporating the polymer at the electron transport material/OMHP interface. More impressively, these solar cells retain more than 80% of initial efficiency after being stored at environmental conditions for more than 1000h, without any encapsulation.[2]

The authors thank the projects PID2019-110430GB-C21, PID2019-110430GB-C22 and PID2019-109603RA-I00 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF (FEDER) A way of making Europe”, by the “European Union". They also thank the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía (PAIDI‐2020 through projects US‐1263142, US‐1381045, US‐1381057, P18‐RT‐3480), and the EU through cohesion fund and FEDER 2014–2020 programs for financial support. C.L.S. and J.S.‐V. thank the University of Seville through the VI PPIT‐US. J.S.‐V.acknowledges the "Ramon y Cajal" and L.C.‐B the "Juan de la Cierva" programs funded by MCIN/AEI/ 10.13039/501100011033. F.J.A. also thanks the EMERGIA Junta de Andalucía program. The projects leading to this article have received funding from the EU H2020 program under the grant agreements 851929 (ERC Starting Grant 3DScavengers). J.A.A. thanks MCIN/AEI/ 10.13039/501100011033 for SCALEUP SOLAR‐ project PCI2019‐111839‐2.  

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