DataVXAdvanced Optical MaterialsPaper
journal article·2022-02Open access

Modulating Emission Properties in a Host–Guest Colloidal Quantum Well Superlattice

Junhong Yu, Manoj Sharma, Yimeng Wang, Savas Delikanli, Hamed Dehghanpour Baruj, Ashma Sharma, Hilmi Volkan Demir, Cuong Dang

Advanced Optical Materials· Volume 10· Issue 4
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Source abstract

Abstract

Abstract Self‐assembly of colloidal nanocrystals into ordered superlattices is a powerful approach to enable novel collective properties which are not available in individual colloids. However, to date, it remains a major challenge to develop a practical route to modulate such collective properties for potential photonic applications. Herein, it is shown that the collective emission properties in colloidal quantum well (CQW) superlattices, including emission color and anisotropy, can be effectively modulated in a binary host–guest architecture. The experimental and theoretical results reveal that excitons of the host (i.e., the undoped CQWs) generated by photoexcitation can be controllably harvested by the guest (i.e., the Cu‐doped CQWs) for light emission, owing to an exciton hopping assisted exciton trapping process. Such a nano‐building block with tunable collective optical properties may enlighten novel colloidal material‐based photonic applications, including optical anti‐counterfeiting, next‐generation liquid crystal displays, and multifunctional biological markers.
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Research context

Nanomaterials

OpenAlex topics: Quantum Dots Synthesis And Properties · Gold and Silver Nanoparticles Synthesis and Applications · Nanocluster Synthesis and Applications

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

Affiliations

LUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays School of Electrical and Electronic Engineering The Photonics Institute (TPI) Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Department of Electrical and Electronics Engineering and Department of Physics UNAM Institute of Materials Science and Nanotechnology Bilkent University Bilkent Ankara 06800 Turkey

ARC Centre of Excellence in Exciton Science Department of Materials Science and Engineering Monash University Clayton Campus Melbourne Victoria 3800 Australia

School of Physical and Mathematical Sciences Division of Physics and Applied Physics Nanyang Technological University Singapore 639798 Singapore

CINTRA UMI CNRS/NTU/THALES 3288 Research Techno Plaza 50 Nanyang Drive, Border X Block, Level 6 Singapore 637553 Singapore

Funding

National Research Foundation Singapore

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