| Title: |
Ultrafast charge transfer and coherent phonons in electroactive organic cation-templated low-dimensional perovskite analogues. |
| Authors: |
Devroey, Ilan; Boeije, Yorrick; Banks, Peter; Quarti, Claudio; La Magna, Paola; Ciesielska, Aleksandra; Lutsen, Laurence; Derveaux, Elien; Adriaensens, Peter; Van Hecke, Kristof; Beljonne, David; Stranks, Samuel D; Van Gompel, Wouter T M |
| Contributors: |
S817 - Chimie des matériaux nouveaux; R150 - Institut de Recherche sur les Systèmes Complexes; R400 - Institut de Recherche en Science et Ingénierie des Matériaux |
| Source: |
Nanoscale Horizons, 11 (1), 185 - 201 (2026-01-05) |
| Publisher Information: |
Royal Society of Chemistry |
| Publication Year: |
2026 |
| Subject Terms: |
Coherent phonons; Electro actives; Electronic tunability; Hybrid organic-inorganic; Low dimensional; Optoelectronic applications; Organic cations; Perovskite structures; Templated; Ultra-fast; Materials Science (all); Physical; chemical; mathematical & earth Sciences; Chemistry; Physique; chimie; mathématiques & sciences de la terre |
| Description: |
peer reviewed ; Hybrid organic-inorganic perovskites (HOIPs) have emerged as promising materials for optoelectronic applications, yet gaining control over their structural and electronic tunability remains a key challenge. In this study, we introduce 7H-dibenzo[c,g]carbazole (DBCz) as a novel electroactive organic cation that enables the formation of two distinct low-dimensional hybrid metal halides: a conventional 2D perovskite structure, (DBCz)2PbI4, and a previously unreported layered perovskite analogue structure with edge-sharing octahedra, DBCzPbI3. The edge-sharing phase represents a new structural motif within the hybrid metal halide family. Both materials exhibit a type-II band alignment, facilitating ultrafast photoinduced hole transfer from the inorganic to the organic layer. Using transient absorption spectroscopy, we identify the formation of DBCz-based hole polarons in both phases, and uniquely observe the charge-transfer-induced formation of triplet states and room-temperature coherent phonons for the perovskite analogue phase. These findings highlight the role of molecular design in controlling excited-state dynamics and exciton-lattice interactions in hybrid metal halides. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| ISSN: |
2055-6756; 2055-6764 |
| Relation: |
http://pubs.rsc.org/en/content/articlepdf/2026/NH/D5NH00494B; urn:issn:2055-6756; urn:issn:2055-6764; https://orbi.umons.ac.be/handle/20.500.12907/55516; info:hdl:20.500.12907/55516; info:pmid:41186317 |
| DOI: |
10.1039/d5nh00494b |
| Availability: |
https://orbi.umons.ac.be/handle/20.500.12907/55516; https://hdl.handle.net/20.500.12907/55516; https://orbi.umons.ac.be/bitstream/20.500.12907/55516/1/devroy-lowdimenions-nanoscalehoriz2026.pdf; https://doi.org/10.1039/d5nh00494b |
| Rights: |
open access ; http://purl.org/coar/access_right/c_abf2 ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.1B9ACD7C |
| Database: |
BASE |