Fig. 1: Proposed cyclic degradation mechanism of a tin iodide perovskite under ambient air exposure. | Nature Communications

Fig. 1: Proposed cyclic degradation mechanism of a tin iodide perovskite under ambient air exposure.

From: Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide

Fig. 1

Unless stated otherwise, ‘A’ refers to the organic cations chosen for the preparation of the hybrid tin perovskite (20% PEA and 80% FA in the present work). Reaction 1: oxidation of perovskite by O2 and SnI4 formation; Reaction 2: solid-state formation of A2SnI6 from SnI4 and AI, where A ≡ FA. Reaction 3: hydrolysis of SnI4 by H2O and HI formation; Reaction 4: oxidation of HI by O2 and I2 formation; Reaction 5: oxidation of perovskite by I2 and SnI4 formation.

Back to article page