Green Synthesis of Cyclobutane-Based Hole-Selective Materials for Efficient Perovskite Solar Cells and Modules
Šarūnė Daškevičiūtė-Gegužienė a, Yi Zhang b, Kasparas Rakštys a, Marytė Daškevičienė a, Vygintas Jankauskas c, Mohammad Khaja Nazeeruddin b, Vytautas Getautis a
a Department of Organic Chemistry, Kaunas University of Technology, Kaunas, Lithuania
b Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Sion, Switzerland
c Institution of Chemical Physics, Vilnius University, Lithuania
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
Poster, Šarūnė Daškevičiūtė-Gegužienė, 225
Publication date: 20th April 2022

Over the recent years, organic-inorganic hybrid perovskite solar cells (PSCs) have been attracting a massive worldwide attention due to their low cost and facile fabrication. HTM is one of the quintessential components required for the efficient and stable PSC devices. The hunt is now on for new organic semiconductors that are prepared by simple, cost-effective, and green chemistry without sacrificing the efficiency [1].

Is known that photodimerized carbazole is an attractive building block due to the simple, elegant and green synthesis [2]. Herein, we disclose the development of novel HTMs, which comprises cyclobutane as a new structural core element for HTMs. Novel cyclobutane-based HTMs have been successfully applied in PSCs showing PCE up to 21%. Most importantly, to obtain novel HTMs we have applied protocols inspired by green chemistry, for the first time presenting that HTMs for PSCs could be synthesized eliminating the use of hazardous substances in order to reduce the adverse environmental impact without sacrificing the efficiency.

And another issue of importance to commercialization is their large-scale production. Modules based on V1366 at a size of 6.5 cm × 7 cm were fabricated. The performance of module with high PCEs of 19.06%, as far as we know, this is the highest non Spiro-OMeTAD system PSC modules photoelectric conversion efficiency.

S.D.-G., M.D. and V.G. acknowledge  funding from European Regional Development Fund (project No 01.2.2-LMT-K-718-03-0040) under grant agreement with the Research Council of Lithuania (LMTLT).

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