ArticleNature materials2017
Visualizing excitations at buried heterojunctions in organic semiconductor blends.
Article in Nature materials, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed.
- Dielectric-tuned charge and exciton dynamics in perylene bisimide supramolecular aggregates.Nature communications · 2026Article
- Ultrafast charge-generation dynamics through interfacial energetic modulation for high-performance single-component organic photovoltaics with 14.8% efficiency.Nature communications · 2026Article
- Activationless Charge Transfer Drives Photocurrent Generation in Organic Photovoltaic Blends Independent of Energetic Offset.Journal of the American Chemical Society · 2024Article
- Imaging hot photocarrier transfer across a semiconductor heterojunction with ultrafast electron microscopy.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Competitive Charge Separation Pathways in a Flexible Molecular Folda-Dimer.The journal of physical chemistry. B · 2024Article
- Manipulation of Charge Delocalization in a Bulk Heterojunction Material Using a Mid-Infrared Push Pulse.The journal of physical chemistry. C, Nanomaterials and interfaces · 2023Article
- Ultrafast Dynamics Revealed with Time-Resolved Scanning Tunneling Microscopy: A Review.ACS applied optical materials · 2023Review
- Hot Carrier Cooling and Trapping in Atomically Thin WSACS nano · 2023Article
- Multifaceted Excited State Dynamics of Coumarin Dyes Anchored on AlMolecules (Basel, Switzerland) · 2022Article
- Article
- Direct observation of charge separation in an organic light harvesting system by femtosecond time-resolved XPS.Nature communications · 2021Article
- Long-lived and disorder-free charge transfer states enable endothermic charge separation in efficient non-fullerene organic solar cells.Nature communications · 2020Article
- Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes.Nature communications · 2020Article
- A generalized Stark effect electromodulation model for extracting excitonic properties in organic semiconductors.Nature communications · 2019Article
- Size-Dependent Photophysical Behavior of Low Bandgap Semiconducting Polymer Particles.Frontiers in chemistry · 2019Article
- Probing the pathways of free charge generation in organic bulk heterojunction solar cells.Nature communications · 2018Article
- Order enables efficient electron-hole separation at an organic heterojunction with a small energy loss.Nature communications · 2018Article
- Highly mobile charge-transfer excitons in two-dimensional WSScience advances · 2018Article
- Charge separation and carrier dynamics in donor-acceptor heterojunction photovoltaic systems.Structural dynamics (Melville, N.Y.) · 2017Review
- Organic photovoltaics: Pushing the knowledge of interfaces.Nature materials · 2017Article
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Interfaces play a crucial role in semiconductor devices, but in many device architectures they are nanostructured, disordered and buried away from the surface of the sample. Conventional optical, X-ray and photoelectron probes often fail to provide interface-specific information in such systems. Here we develop an all-optical time-resolved method to probe the local energetic landscape and electronic dynamics at such interfaces, based on the Stark effect caused by electron-hole pairs photo-generated across the interface. Using this method, we found that the electronically active sites at the polymer/fullerene interfaces in model bulk-heterojunction blends fall within the low-energy tail of the absorption spectrum. This suggests that these sites are highly ordered compared with the bulk of the polymer film, leading to large wavefunction delocalization and low site energies. We also detected a 100 fs migration of holes from higher- to lower-energy sites, consistent with these charges moving ballistically into more ordered polymer regions. This ultrafast charge motion may be key to separating electron-hole pairs into free charges against the Coulomb interaction.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.