Unveiling the Influence of Hot Carriers on Photovoltage Formation in Perovskite Solar Cells
The experimental and theoretical study of photovoltage formation in perovskite solar cells under pulsed laser excitation at 0.53 μm wavelength is presented. Two types of solar cells were fabricated on the base of cesium-containing triple cation perovskite films: (1) Cs<sub>x</sub>(FA<sub>0.83</sub>MA<sub>0.17</sub>)<sub>(1-x)</sub>Pb(I<sub>0.83</sub>Br<sub>0.17</sub>)<sub>3</sub> and (2) Cs<sub>x</sub>(FA<sub>0.83</sub>MA<sub>0.17</sub>)<sub>(1-x)</sub>Pb<sub>0.8</sub>Sn<sub>0.2</sub>(I<sub>0.83</sub>Br<sub>0.17</sub>)<sub>3</sub>. It is found that photovoltage across the solar cells consists of two components, <i>U</i> = <i>U<sub>ph</sub></i> + <i>U<sub>f</sub></i>. The first one, <i>U<sub>ph</sub></i>, is the traditional photovoltage arising due to laser radiation-induced electron-hole pair generation. The second one, <i>U<sub>f</sub></i>, is the fast component following the laser pulse and has a polarity opposite to that of <i>U<sub>ph</sub></i>. It is shown that the fast photovoltage component results from the laser radiation-caused heating of free carriers. The transient photovoltage measurements show that the values of the fast component <i>U<sub>f</sub></i> are nearly the same in both types of perovskite solar cells. The magnitude of the traditional photovoltage of mixed Pb-Sn perovskite solar cells is lower than that of Pb-based cells.
Authors
- Algirdas Selskis (ORCID: https://orcid.org/0000-0002-0940-3733)
- Algirdas Sužiedėlis (ORCID: https://orcid.org/0000-0001-5725-1378)
- Konstantinas Leinartas (ORCID: https://orcid.org/0000-0002-9097-3791)
- Aurimas Čerškus (ORCID: https://orcid.org/0000-0001-8439-5115)
- Edmundas Širmulis
- Andžej Lučun
- S. Ašmontas (ORCID: https://orcid.org/0000-0003-3816-3545)
- Muhammad Mujahid (ORCID: https://orcid.org/0000-0003-4714-9980)
- Asta Grigucevičienė (ORCID: https://orcid.org/0000-0002-3761-1257)
- Jonas Gradauskas (ORCID: https://orcid.org/0000-0002-0538-4854)
- Kazimieras Petrauskas (ORCID: https://orcid.org/0000-0002-6758-1474)
- Aldis Šilėnas (ORCID: https://orcid.org/0000-0002-7761-3011)
- Raimondas Giraitis (ORCID: https://orcid.org/0009-0001-5635-8250)
Institutions
- Center for Physical Sciences and Technology (LT)
Publication Details
- Journal
- Materials
- Published
- 2024-12-28
- DOI
- https://doi.org/10.3390/ma18010085
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.63