EU PVSEC Programme Online
EU PVSEC 2020, 7 - 11 September 2020
Presentation: 3BV.1.22 Improvements on the Stability of MAPbI3 Thin Films Against UV Radiation by a Low Temperature Encapsulation Method That Uses Commercial Ethylene-Vinyl Acetate Sheets
Type: Visual
Date: Tuesday, 8th September 2020
08:30 - 10:00
Author(s): L. Ocaña, C. Montes, S. González-Pérez, B. González-Diaz, M. Friend, M. Cendagorta
Presenter / Speaker: L. Ocaña, ITER, Granadilla de Abona, Spain
Event: Conference Conference
Session: 3BV.1 Perovskites
Type(s) of Access:  Conference Registration
Topic: 3. 1 Perovskites
Summary / Abstract: This extended abstract introduces a method of encapsulation at low temperature that uses a commercial sheet composed of ethylene-vinyl acetate (EVA), in order to protect perovskite layers from humid environments and UV radiation. MAPbI3 thin films were deposited over a batch of glass substrates using spin coating techniques, half of the batch being encapsulated. Then they were exposed to solar radiation in an environment that had a relative humidity (RH) from 60 to 80%. The degradation processes were characterized by microscope imaging, optical ellipsometry and Fourier-transform infrared spectroscopy (FTIR) techniques. Preliminary results indicate that the EVA encapsulated samples, unlike their non-encapsulated counterparts, remained stable above 350 hours under solar radiation. Also, from the FTIR study performed, it can be inferred that the vibration modes at 3181 cm-1 (N-H stretch), 3124 cm-1 (N-H stretch), 1465 cm-1 (symmetric NH3+ bend) can be used as indicator peaks of the perovskite degradation caused by UV light.