The MXenes/BCP composite electron-transporting interlayer for the stabilization of inverted PCS

Anastasia Iakusheva^a, Danila Saranin^a, Dmitry Muratov^a, Hanna Pazniac^b, Denis Kuznetsov^c, Aldo Di Carlo^d

^aLASE–Laboratory for Advanced Solar Energy, National University of Science and Technology MISiS, Leninsky Avenue, 6, Moskva, Russian Federation

^bInstitut PPRIME, UPR 3346 CNRS - Universite de Poitiers – ENSMA Département de Physique et Mécanique des Matériaux, France

^cDepartment of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology ‘MISiS’, Moscow, Russia, Russian Federation

^dCHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome ‘‘Tor Vergata’’, Via del Politecnico, 1, Roma, Italy

Proceedings of Online Conference on Perovskites for Energy Harvesting: From Fundamentals to Devices (PERENHAR)

Online, Spain, 2020 November 19th - 20th

Organizers: Dinesh Kabra, Sandheep Ravishankar, Angshuman Nag and Priya Mahadevan

Poster, Anastasia Iakusheva, 007
Publication date: 2nd November 2020

ePoster:

Perovskite solar cells (PSCs) are a breakthrough technology for photovoltaics (PV) that has shown rapid progress in performance achieving 25.2% of power conversion efficiency (PCE) in less than ten years. However, the problem of stability is still the main problem that delays commercialization of PSC technology. The interface engineering is promising approach for the suppression of interface corrosion, induced by migration of charged ion defects from the perovskite films towards the contacts. A new promising class of 2D materials MXenes was considered for fine tuning of optoelectronic and charge extraction properties in PCS [1], but the impact for the stability of PCSs was not deeply investigated.

Herein, we demonstrate the new composite electron-transporting interlayer of BCP:MXenes for the suppression of the corrosion effects and optimization of energy level alignment at metal contact interface of the inverted perovskite solar cells (ITO/NiO/Perovskite/PCBM/BCP:Mxene/Ag). The investigation for the impact of charge extraction properties and output characteristics with use of BCP:MXenes interlayers was done for single and multi-cation perovskite solar cells (PSCs). The stability studies were performed accord to actual ISOS protocols[2] including soaking testing, MPPT; outdoor thermal cycling; and light cycling measurements.

The obtained results for the use of composite interlayer of BCP/MXenes instead of single BCP demonstrated enhanced stability for encapsulated and non-capsulated devises. Moreover, the suppression of the recombination processes at the ETL/metal junction result to improved output characteristic of the fabricated solar cells.

References:

[1] A. Agresti, A. Pazniak, S. Pescetelli, A. Di Vito, D. Rossi, A. Pecchia, M. Auf der Maur, A. Liedl, R. Larciprete, D. Kuznetsov, D. Saranin, A. Di Carlo Titanium-carbide MXenes for work function and interface engineering in perovskite solar cells, Nature Materials

[2] Mark V. Khenkin, Eugene A. Katz , Antonio Abate et al. Consensus statement for stability assessment and reporting for perovskite photovoltaics based on ISOS procedures Nature Energy, 2020, 35–49

Acknowledgements:

Authors gratefully acknowledge the financial support from the Ministry of Science and Higher Education of the Russian Federation in the framework of MegaGrant (no. 075-15-2019-872 /074-02-2018-327).

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