Photo-thermal induced degradation of methylammonium lead iodide Perovskite films with and without polymeric protective layer under different ambient conditions

Aldibaja Fadi Kamal^a

^aSapienza university of Rome, via trasacco,3 piano 1 154 Rome

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Aldibaja Fadi Kamal, 445
Publication date: 5th February 2015

Organic-inorganic Perovskite solar cells become in a short time one of the hottest topic in the solar cell field, especially after the high obtained efficiency (around 16%), but the question of being stable enough to work in the ambient atmosphere is still unsolved yet. The Working condition of such kind of solar cells should including the effect of light, heat, moisture, and the interaction of these three factors at the same time. We have studied these conditions using thin films of MAPbI3 stand alone or covered with PMMA Poly (methyl methacrylate) as a protective layer. The results shows that the most Destructive influence is the heat with light which degrades the perovskite films so rapidly (within one day). The second subversive effects is heat, especially in the absence of PMMA. Time-resolved photoluminescence Decay measurements shows that samples with PMMA maintained a constant lifetime during the first two days, but it decrease in a different rate in case of Heat and light. On the other hand Sample with PMMA saved in the dark without exposure to light or heat showed increasing of the lifetime. By using X-ray, we prove the formation of Perovskite at the beginning of the experiments and the converting into PbI2 after one day under the Heat and light treatment of samples without PMMA and two days for a samples with PMMA. 0 100 200 300 400 0.1

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