دورية أكاديمية
أعرض في EDS

A composite electrodynamic mechanism to reconcile spatiotemporally resolved exciton transport in quantum dot superlattices.

التفاصيل البيبلوغرافية
العنوان: A composite electrodynamic mechanism to reconcile spatiotemporally resolved exciton transport in quantum dot superlattices.
المؤلفون: Yuan R; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Roberts TD; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Brinn RM; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Choi AA; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Park HH; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Yan C; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Ondry JC; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Khorasani S; Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA., Masiello DJ; Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA.; Department of Chemistry, University of Washington, Seattle, WA 98195, USA., Xu K; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA.; STROBE, National Science Foundation Science and Technology Center, University of California Berkeley, Berkeley, CA 94720, USA., Alivisatos AP; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA., Ginsberg NS; Department of Chemistry, University of California Berkeley, Berkeley, CA 94720, USA.; STROBE, National Science Foundation Science and Technology Center, University of California Berkeley, Berkeley, CA 94720, USA.; Department of Physics, University of California Berkeley, Berkeley, CA 94720, USA.; Materials Science Division and Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.; Kavli Energy NanoSciences Institute at Berkeley, Berkeley, CA 94720, USA.
المصدر: Science advances [Sci Adv] 2023 Oct 20; Vol. 9 (42), pp. eadh2410. Date of Electronic Publication: 2023 Oct 20.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Washington, DC : American Association for the Advancement of Science, [2015]-
مستخلص: Quantum dot (QD) solids are promising optoelectronic materials; further advancing their device functionality requires understanding their energy transport mechanisms. The commonly invoked near-field Förster resonance energy transfer (FRET) theory often underestimates the exciton hopping rate in QD solids, yet no consensus exists on the underlying cause. In response, we use time-resolved ultrafast stimulated emission depletion (STED) microscopy, an ultrafast transformation of STED to spatiotemporally resolve exciton diffusion in tellurium-doped cadmium selenide-core/cadmium sulfide-shell QD superlattices. We measure the concomitant time-resolved exciton energy decay due to excitons sampling a heterogeneous energetic landscape within the superlattice. The heterogeneity is quantified by single-particle emission spectroscopy. This powerful multimodal set of observables provides sufficient constraints on a kinetic Monte Carlo simulation of exciton transport to elucidate a composite transport mechanism that includes both near-field FRET and previously neglected far-field emission/reabsorption contributions. Uncovering this mechanism offers a much-needed unified framework in which to characterize transport in QD solids and additional principles for device design.
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تواريخ الأحداث: Date Created: 20231020 Latest Revision: 20231030
رمز التحديث: 20240628
مُعرف محوري في PubMed: PMC10588942
DOI: 10.1126/sciadv.adh2410
PMID: 37862422
قاعدة البيانات: MEDLINE
الوصف
تدمد:2375-2548
DOI:10.1126/sciadv.adh2410