# Exciton Diffusion in Two‐dimentional Chiral Perovskites https://mdr.nims.go.jp/datasets/250da6e8-54c4-4fad-8684-ec36b8401938 ## File - [Advanced Optical Materials - 2025 - Terres - Exciton Diffusion in Two‐dimentional Chiral Perovskites.pdf](https://mdr.nims.go.jp/filesets/1ab9f7db-0201-4dcf-be33-fce719c6b577/download) ([Detail](https://mdr.nims.go.jp/filesets/1ab9f7db-0201-4dcf-be33-fce719c6b577.md)) ## Id 250da6e8-54c4-4fad-8684-ec36b8401938 ## Local identifier ## Visibility open_to_public ## State published ## Created at 2026-02-15T02:47:30.596664Z ## Updated at 2026-02-17T03:30:29.306914Z ## Published at 2026-02-17T00:11:00.459419Z ## Doi ## First published url https://doi.org/10.1002/adom.202402606 ## Date published 2025-03-28 ## Recorded date published 2025-4 ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: Exciton Diffusion in Two‐dimentional Chiral Perovskites title_type: original lang: en ## Description - description: Two-dimensional (2D) organic-inorganic hybrid perovskites emerged as a versatile platform for light-emitting and photovoltaic applications due to their unique structural design and chemical flexibility. Their properties depend heavily on both the choice of the inorganic lead halide framework and the surrounding organic layers. Recently, the introduction of chiral cations into 2D perovskites has attracted major interest due to their potential for introducing chirality and tuning the chiro-optical response. Importantly, the optical properties in these materials are dominated by tightly bound excitons that also serve as primary carriers for the energy transport. The mobility of photoinjected excitons is thus important from the perspectives of fundamental material properties and optoelectronic applications, yet remains an open question. Here, we demonstrate exciton propagation in a 2D chiral perovskite methylbenzyl ammonium lead iodide (MBA2PbI4) using transient photoluminescence microscopy and reveal density-dependent transport over more than 100 nanometers at room temperature with diffusion coefficients as high as 2 cm2/s. We observe two distinct regimes of initially rapid diffusive propagation and subsequent localization. Moreover, perovskites with enantiomer pure cations are found to exhibit faster exciton diffusion compared to the racemic mixtures, correlated with the impact of the material composition on disorder. Altogether, the observations of efficient exciton diffusion at room temperature highlight the potential of 2D chiral perovskites to merge chiro-optical properties with strong light-matter interaction and efficient energy transport. description_type: abstract lang: und ## Creator - name: Sophia Terres role: author - name: Lucas Scalon role: author - name: Julius Brunner role: author - name: Dominik Horneber role: author - name: Johannes Düreth role: author - name: Shiyu Huang role: author - name: Takashi Taniguchi role: author orcid: https://orcid.org/0000-0002-1467-3105 organization: National Institute for Materials Science - name: Kenji Watanabe role: author orcid: https://orcid.org/0000-0003-3701-8119 organization: National Institute for Materials Science - name: Ana Flávia Nogueira role: author - name: Sven Höfling role: author - name: Sebastian Klembt role: author - name: Yana Vaynzof role: author - name: Alexey Chernikov role: author ## Contact agent ## Publisher organization: Wiley ## Managing organization ## Keyword - subject: chiral perovskites schema: not_defined - subject: exciton diffusion schema: not_defined - subject: transient photoluminescence microscopy schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by/4.0/ date_licensed: 2025-03-28 ## Other identifier(s) ## Data origin - data_origin_type: other ## Embargo ## Journal - title: Advanced Optical Materials issn: '21951071' volume: '13' issue: '11' article_number: '2402606' ## Conference ## Related item ## Funding - identifier: 21H05233 funder_name: Japan Society for the Promotion of Science - identifier: 23H02052 funder_name: Japan Society for the Promotion of Science - identifier: 2017/11631‐2 funder_name: Fundação de Amparo à Pesquisa do Estado de São Paulo - identifier: 2018/21401‐7 funder_name: Fundação de Amparo à Pesquisa do Estado de São Paulo - identifier: 2020/04406‐5 funder_name: Fundação de Amparo à Pesquisa do Estado de São Paulo - identifier: 2021/12104‐1 funder_name: Fundação de Amparo à Pesquisa do Estado de São Paulo - identifier: R.8003.22 funder_name: Sächsisches Staatsministerium für Wissenschaft und Kunst - identifier: '390858490' funder_name: Deutsche Forschungsgemeinschaft ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: 1ab9f7db-0201-4dcf-be33-fce719c6b577 filename: Advanced Optical Materials - 2025 - Terres - Exciton Diffusion in Two‐dimentional Chiral Perovskites.pdf content_type: application/pdf size: 1800425 md5: 75e07b843a6a77cf8e2f1737fb754574 ## Thumbnail fileset_id: 1ab9f7db-0201-4dcf-be33-fce719c6b577 filename: Advanced Optical Materials - 2025 - Terres - Exciton Diffusion in Two‐dimentional Chiral Perovskites.pdf