Dynamics of photo-induced degradation of perovskite photovoltaics: from reversible to irreversible processes Academic Article uri icon

abstract

  • The operational stability of perovskite solar cells (PSCs) remains one of the limiting factors of their commercial implementation. We studied the long-term outdoor stability, as well as the dynamics of the cells' degradation, under constant, simulated sunlight indoor and their recovery in the dark, of ITO/SnO2/Cs0. 05 ((CH3NH3) 0.15 (CH (NH2) 2) 0.85) 0.95 PbI2. 55Br0. 45/Spiro-OMeTAD/Au cells. The extent of overall degradation was found to depend on processes occurring under illumination and in the dark, ie, during day time and night time, whose dynamics vary with cell ageing. Full recovery of efficiency was observed in the dark for cells at early degradation stages. Further cell degradation resulted in recovery times much longer than one night, appearing as irreversible degradation under real operational conditions. At later degradation stages very different dynamics were observed: JSC and …

publication date

  • February 7, 2018