Photogenerated charge transfer in Dion-Jacobson type layered perovskite based on naphthalene diimide

Incorporating organic semiconducting spacer cations into layered lead halide perovskite structures provides a powerful approach to mitigate the typical strong dielectric and quantum confinement effects by inducing charge-transfer between the organic and inorganic layers. Herein we report the synthesis and characterization of thin films of novel DJ-phase organic-inorganic layered perovskite semiconductors using a naphthalene diimide (NDI) based divalent spacer cation, which is shown to accept photogenerated electrons from the inorganic layer. With alkyl chain lengths of 6 carbons, an NDI-based thin film exhibited electron mobility (based on space charge-limited current for quasi-layered n = 5 material) was found to be as high as 0.03 cm(2) V-1 s(-1) with no observable trap-filling region suggesting trap passivation by the NDI spacer cation.

Automated summary

Incorporating organic semiconducting spacer cations into layered lead halide perovskite structures can mitigate dielectric and quantum confinement effects by inducing charge-transfer between the organic and inorganic layers. This study reports the synthesis and characterization of novel DJ-phase organic-inorganic layered perovskite semiconductors with a naphthalene diimide (NDI) based spacer cation that can accept photogenerated electrons from the inorganic layer. The NDI-based thin film with a 6-carbon alkyl chain length exhibited high electron mobility and trap passivation by the NDI spacer cation.