2026-10-12T08:10:26Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34032668 2026-09-30T13:38:49Z category_1 category_146 category_915 category_19 category_21 category_24 category_272 category_734 category_64 portal_63 item_type_6 month_year_09_2026

Bidirectional Photocurrents Induced by Ferrocene Spacers in Layered Hybrid Perovskites Melina Dahlke (22491073) Yaşar Krysiak (10688446) Onno Strolka (20344563) Jannika Lauth (1967152) Marvin Treger (6532586) Carolin König (1492087) Sebastian Polarz (1282956) Biophysics Space Science Physical Sciences not elsewhere classified Pharmacology Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Cancer introducing molecular switches induce distinct photoresponses external electric field different band gaps space charge zones charge carrier arrangement induced charge carriers functional semiconductor materials layered hybrid perovskites hold much potential bidirectional photocurrents induced hybrid perovskites induced photocurrents charge transfer layered dion semiconductor properties positive photocurrents technology advances reversible modulation perovskite framework multistate photosensing iodide contents enhanced functionality electronic communication adjusting bromide As our technology advances, the demand for more functional semiconductor materials has grown. In layered hybrid perovskites, an enhanced functionality can be achieved by introducing molecular switches as spacers. These spacers permit the reversible modulation of the semiconductor properties, which can, for example, induce distinct photoresponses. In particular, negative and positive photocurrents (NPC, PPC) hold much potential for multistate photosensing. However, NPC in a single-layered hybrid perovskite material remains currently unknown. Here, we report on NPC and PPC in layered Dion-Jacobson-like and Ruddlesden–Popper hybrid perovskites induced by a switchable ferrocene-based spacer. Electronic communication in the form of charge transfer between the ferrocene moiety and the perovskite framework was confirmed via transient absorption spectroscopy. Under an external electric field, the ferrocene-induced charge carriers are rearranged into space charge zones, which quenches the conductivity, resulting in the NPC. This charge carrier arrangement is prohibited in Ruddlesden–Popper phases due to the presence of a van der Waals gap, leading to the PPC. Furthermore, NPC can also be realized for hybrid perovskites with different band gaps by adjusting bromide and iodide contents, highlighting the potential of spacer-induced photocurrents as the semiconductor properties can be tuned as needed. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acs.chemmater.6c02198.s001 https://figshare.com/articles/journal_contribution/Bidirectional_Photocurrents_Induced_by_Ferrocene_Spacers_in_Layered_Hybrid_Perovskites/34032668 CC BY-NC 4.0