journal article·2023-11-28

Decoding the Self-Assembly Plasmonic Interface Structure in a PbS Colloidal Quantum Dot Solid for a Photodetector

Tianfu Guan, Wei Chen, Haodong Tang, Dong Li, Xiao Wang, Christian L. Weindl, Yawen Wang, Zhiqiang Liang, Suzhe Liang, Tianxiao Xiao, Suo Tu, Stephan V. Roth, Lin Jiang, Peter Müller-Buschbaum

ACS Nano· Volume 17· Issue 22
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Abstract

Hybrid plasmonic nanostructures have gained enormous attention in a variety of optoelectronic devices due to their surface plasmon resonance properties. Self-assembled hybrid metal/quantum dot (QD) architectures offer a means of coupling the properties of plasmonics and QDs to photodetectors, thereby modifying their functionality. The arrangement and localization of hybrid nanostructures have an impact on exciton trapping and light harvesting. Here, we present a hybrid structure consisting of self-assembled gold nanospheres (Au NSs) embedded in a solid matrix of PbS QDs for mapping the interface structures and the motion of charge carriers. Grazing-incidence small-angle X-ray scattering is utilized to analyze the localization and spacing of the Au NSs within the hybrid structure. Furthermore, by correlating the morphology of the Au NSs in the hybrid structure with the corresponding differences observed in the performance of photodetectors, we are able to determine the impact of interface charge carrier dynamics in the coupling structure. From the perspective of architecture, our study provides insights into the performance improvement of optoelectronic devices.
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Research context

OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Quantum Dots Synthesis And Properties · Plasmonic and Surface Plasmon Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany

Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, People’s Republic of China

College of Integrated Circuit and Optoelectronic Chips, Shenzhen Technology University, Shenzhen 518118, People’s Republic of China

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, People’s Republic of China

Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany

KTH Royal Institute of Technology, Department of Fibre and Polymer Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden

Heinz Maier-Leibniz Zentrum (MLZ), Technical University of Munich, Lichtenbergstraße 1, 85748 Garching, Germany

Funding

Technische Universit?t M?nchen · Science and Technology Foundation of Shenzhen City · Basic and Applied Basic Research Foundation of Guangdong Province · Deutsche Forschungsgemeinschaft · Center for NanoScience, Ludwig-Maximilians-Universit?t M?nchen · Bayerisches Staatsministerium f?r Bildung und Kultus, Wissenschaft und Kunst · Jiangsu Provincial Department of Science and Technology · China Scholarship Council · National Natural Science Foundation of China · Solar Technologies go Hybrid · Priority Academic Program Development of Jiangsu Higher Education Institutions · Higher Education Discipline Innovation Project

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