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Abstract We studied theoretically the screening of the Coulomb interaction in the 2D layered halide organic-inorganic perovskite PEPI. We show that the screening reduces considerably the exciton binding energy at… Click to show full abstract
Abstract We studied theoretically the screening of the Coulomb interaction in the 2D layered halide organic-inorganic perovskite PEPI. We show that the screening reduces considerably the exciton binding energy at high temperature, acting on the displacement of the equilibrium exciton-plasma densities for the studied system. The presence of strongly bound excitons and trions in the perovskite layers is predicted by an analytical calculation using a mass action law and we discuss the trion formation with excess background carriers. Our study gives some tracks to find the right samples and the right experimental conditions to observe the trions in such materials.
Journal Title: Physica E: Low-dimensional Systems and Nanostructures
Year Published: 2019
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