Tunable ionic conductivity and photoluminescence in quasi-2D CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> thin films incorporating sulphur doped graphene quantum dots
Ramesh Kumar, Jitendra Kumar, Sachin Kadian, Priya Srivastava, Gaurav Manik, Monojit Bag
Abstract
perovskite shows a monotonic increase with increasing applied bias due to reduced ionic conductivity. SGQDs at the grain boundaries of 2D/3D perovskites prohibit ion migration through the active layer, and therefore the electronic-ionic coupling is reduced. This results in increased recombination resistance with increasing applied bias.
Topics & Concepts
GrapheneConductivityPerovskite (structure)PhotoluminescenceDopingMaterials scienceQuantum dotIonic bondingIonSemiconductorIonic conductivityOptoelectronicsChemical physicsCondensed matter physicsChemistryNanotechnologyElectrodeCrystallographyPhysical chemistryPhysicsElectrolyteOrganic chemistryPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyAdvanced Photocatalysis Techniques