TITLE:
Effects of Residual Oxygen in the Degradation of the Performance of Organic Bulk Heterojunction Solar Cells: Stability, Role of the Encapsulation
AUTHORS:
Vianou Irénée Madogni, Macaire Agbomahéna, Basile Bruno Kounouhéwa, Olivier Douhéret, Roberto Lazzaroni
KEYWORDS:
Encapsulation, Alteration, Oxidation, Residual Oxygen, Moisture, Impurities
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.8 No.9,
September
11,
2018
ABSTRACT: We have shown in our first articles [1] [2] that even after encapsulation, the first rapid phase of degradation
mechanism observed has been attributed to oxidation of interfaces and an
alteration of the charges collection process. A second phase slower is induced
by the oxidation of the active film, namely a decrease in the absorption and a
degradation of the charge transport process. We revealed that another decrease in power conversion efficiency which has been induced by
a possible interfacial passivation occurred at the organic/cathode interface,
owing to the presence of residual oxygen, moisture and other impurities. This
is in reality the real cause of the first rapid phase of degradation mechanism
observed.