Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/2468
Title: Crystal Reorientation and Amorphization Induced by Stressing Efficient and Stable P-I-N Vacuum-Processed MAPbI(3) Perovskite Solar Cells
Authors: Kaya, İsmail C.
Zanoni, Kassio P. S.
Palazon, Francisco
Sessolo, Michele
Akyıldız, Hasan
Sönmezoğlu, Savaş
Bolink, Henk J.
Keywords: atomic layer deposition
crystal orientation
perovskite solar cells
stability
thermal evaporation
Long-Term Stability
Atomic Layer Deposition
Charge-Transport Layers
Encapsulation
Temperature
Recombination
Photovoltaics
Lifetime
Films
Issue Date: 2021
Publisher: Wiley
Abstract: Herein, the long-term stability of vacuum-deposited methylammonium lead iodide (MAPbI(3)) perovskite solar cells (PSCs) with power conversion efficiencies (PCEs) of around 19% is evaluated. A low-temperature atomic layer deposition (ALD) Al2O3 coating is developed and used to protect the MAPbI(3) layers and the solar cells from environmental agents. The ALD encapsulation enables the MAPbI(3) to be exposed to temperatures as high as 150 degrees C for several hours without change in color. It also improves the thermal stability of the solar cells, which maintain 80% of the initial PCEs after aging for approximate to 40 and 37days at 65 and 85 degrees C, respectively. However, room-temperature operation of the solar cells under 1sun illumination leads to a loss of 20% of their initial PCE in 230h. Due to the very thin ALD Al2O3 encapsulation, X-ray diffraction can be performed on the MAPbI(3) films and completed solar cells before and after the different stress conditions. Surprisingly, it is found that the main effect of light soaking and thermal stress is a crystal reorientation with respect to the substrate from (002) to (202) of the perovskite layer, and that this reorientation is accelerated under illumination.
URI: https://doi.org/10.1002/aesr.202000065
https://hdl.handle.net/20.500.13091/2468
ISSN: 2699-9412
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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