Use of Additives as Successful Methodology to Improve Performance and Stability of Sn-based Perovskite Solar Cells, LEDs and Lasers
Iván Mora-Seró a
a Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castelló de la Plana, Castellón, Spain.
Proceedings of Sustainable Metal-halide perovskites for photovoltaics, optoelectronics and photonics (Sus-MHP)
València, Spain, 2022 December 12th - 13th
Organizers: Teresa S. Ripolles and Hui-Seon Kim
Invited Speaker, Iván Mora-Seró, presentation 020
Publication date: 15th November 2022

Halide perovskite solar cells have revolutionized the photovoltaic field in the last decade. In a decade of intensive research it has been a huge improvement in the performance of these devices. However, the two main drawbacks of this system, the use of hazardous Pb and the long term stability, still to be open questions that have not been fully addressed. The photoconversion performance of perovskite solar cells containing alternative metals to Pb is significantly lower than the reported for devices containing Pb, where Sn-based perovskite solar cells is the alternative reporting higher photovoltaic performance close to 15%. Nevertheless, Sn-based perovskite solar cells exhibit a long term stability lower than their Pb containing counterparts, making stability their main problem. In this talk, we highlight how the use of proper additives can increase significantly the stability of formamidinium tin iodide (FASnI3) solar cells and lasers as well as PEA2SnI4 red emitting LEDs. We also discuss about the different mechanism affecting the stability of these devices, beyond the oxidation of Sn2+, and how they can be countered. In one line summary, we show that proper additives can play an important role in stabilization of Sn-based optoelectronic devices as solar cells, LEDs and lasers.

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