Comparing between steady-state excitonic transitions and ultrafast polaronic photoexcitations in layered perovskites: the role of electron-phonon interaction.

ABSTRACT: We have studied four 2D layered perovskites, including OA₂PbI₄ (RP phase), ODAPbI₄ and BDAPbI₄ (DJ phase), (GA)MAPbI₄ (ACI phase), where OA is [(C _m H_2m+1)NH₃](m = 8), ODA is [NH₃(CH₂) _m NH₃](m = 8), BDA is [NH₃(CH₂) _m NH₃](m = 4), and GA is [C(NH₂)₃]; RP, DJ, and ACI means Ruddlesden-Popper, Dion-Jacobson and alternating cations in the interlayer, respectively. The temperature dependence of absorption and photoluminescence (PL) spectra have been measured. From which the average phonon energy (electron-phonon interaction strength) is analyzed as a

SUBMITTER: Yan P 

PROVIDER: S-EPMC11501284 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature