Optical spectroscopy of two-dimensional layered $(C_{6}H_{5}C_{2}H_{4}-NH_{3})_{2}-PbI_{4}$ perovskite

摘要

We report on optical spectroscopy (photoluminescence and photoluminescenceexcitation) on two-dimensional self-organized layers of$(C_{6}H_{5}C_{2}H_{4}-NH_{3})_{2}PbI_{4}$ perovskite. Temperature andexcitation power dependance of the optical spectra gives a new insight into theexcitonic and phononic properties of this hybrid organic/inorganicsemiconductor. In particular, exciton-phonon interaction is found to be morethan one order of magnitude higher than in GaAs QWs. As a result,photoluminescence emission lines have to be interpreted in the framework of apolaron model.