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Title: Mutual energy transfer in a binary colloidal quantum well complex
Authors: Yu, Junhong
Sharma, Manoj
Delikanli, Savas
Muhammad Danang Birowosuto
Demir, Hilmi Volkan
Dang, Cuong
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Yu, J., Sharma, M., Delikanli, S., Muhammad Danang Birowosuto, Demir, H. V., & Dang, C. (2019). Mutual energy transfer in a binary colloidal quantum well complex. Journal of Physical Chemistry Letters, 10(17), 5193–5199. doi:10.1021/acs.jpclett.9b01939
Journal: Journal of Physical Chemistry Letters 
Abstract: Förster resonance energy transfer (FRET) is a fundamental process that is key to optical biosensing, photosynthetic light harvesting, and down-converted light emission. However, in total, conventional FRET in a donor-acceptor pair is essentially unidirectional, which impedes practical application of FRET-based technologies. Here, we propose a mutual FRET scheme that is uniquely bidirectional in a binary colloidal quantum well (CQW) complex enabled by utilizing the d orbital electrons in a dopant-host CQW system. Steady-state emission intensity, time-resolved, and photoluminescence excitation spectroscopies have demonstrated that two distinct CQWs play the role of donor and acceptor simultaneously in this complex consisting of 3 monolayer (ML) copper-doped CQWs and 4 ML undoped CQWs. Band-edge excitons in 3 ML CQWs effectively transfer the excitation to excitons in 4 ML CQWs, whose energy is also harvested backward by the dopants in 3 ML CQWs. This binary CQW complex, which offers a unique mutual energy-transfer mechanism, may unlock revolutionary FRET-based technologies.
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.9b01939
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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