Hybrid perovskites contain organic amino group in which the H atom in N-H bond is highly active and can migrate and form HX (X=I, Br or Cl) with halide in its proximity, causing decomposition of the perovskites. The replacement of active H with its non-radioative isotope D can effectively retards the decomposition reaction. These deuterated organic cations are demonstrated to be adaptable to any customers' own perovskite formulations but exhibit added stabilizing effect in addition to customer's formulations.
0.5 gram D-substituted formamidinium halides
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