Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-22 1:24

HOME CONFERENCES SEARCH LOGIN NEW USER IMAGES

Conference: Bucharest University Faculty of Physics 2018 Meeting

Section: Physics and Technology of Renewable and Alternative Energy Sources

Title:

Iodide migration in perovskite solar cells

Authors:

Andrei Gabriel TOMULESCU (1,2), Cristina BEȘLEAGĂ(1), Laura Elena ABRAMIUC (1,3), Viorica STANCU(1), Liliana TRINCĂ(1), Lucian PINTILIE(1), George Alexandru NEMNEȘ(3), Lucia LEONAT(1), Ioana PINTILIE(1)

^*
Affiliation:

1) National Institute of Materials Physics, 077125, Magurele, Ilfov, Romania

2) Faculty of Physics,University of Bucharest, 077125 Magurele-Ilfov, Romania

3) University of Bucharest, Faculty of Physics, Materials and Devices for Electronics and Optoelectronics Research Center, 077125, Magurele, Ilfov, Romania

E-mail

andrei.tomulescu@infim.ro

Keywords:

perovskite solar cells, degradation, iodide migration

Abstract:

Proving a massive increase of photovoltaic conversion efficiency (PCE) in a short amount a time, of over 22%, halide perovskite solar cells are the most interesting and fast developing topics of the photovoltaic field [1]. Although massive improvements have been achieved, problems regarding degradation in the presence of moisture and long term stability in normal working conditions still persist [2-4]. For a better understanding of the origin of these processes, we monitored the degradation of perovskite solar cells with mesostructured architecture, over a period of more than 120 days. We monitored the power conversion efficiency, open-circuit voltage and photocurrent evolution. We also analyzed the stability for solar cells with different type of top electrodes. Depending on the type of metal used as top electrode, different degradation rates were determined, but the most unexpected result is the direct observation of iodide attack on the silver electrodes giving us a important clues about the degradation process [5].

References:

[1] W. S., Yang et. Al., Science 30, 1376-1379 (2017).

[2] J. M., Azpiroz et al., Energy Environ. Sci. 8, 2118-2127 (2015).

[3] M., De Bastiani et al., Adv. Energy Mater. 6, 1501453 (2016).

[4] J. A. Christians et al., J. Am. Chem. Soc. 137, 1530-1538 (2016)

[5] C., Besleaga et al., J. Phys. Chem. Lett. 7, 5168–5175 (2016).

Acknowledgement:

The authors acknowledge the Romanian Ministry of Research and Innovation and UEFISCDI for financial support and the EEA Financial Mechanism 2009-2014 under the project contract no 8SEE/30.06.2014.