TY - JOUR
T1 - Mutual energy transfer in a binary colloidal quantum well complex
AU - Yu, Junhong
AU - Sharma, Manoj
AU - Delikanli, Savas
AU - Birowosuto, Muhammad Danang
AU - Demir, Hilmi Volkan
AU - Dang, Cuong
N1 - Funding Information:
We acknowledge financial support from Singapore Ministry of Education through AcRF Tier1 grant (MOE2017-T1-002-142) and Singapore National Research Foundation under the Program of NRF-NRFI-2016-08. H.V.D. gratefully acknowledges additional financial support from the TUBA.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/9/5
Y1 - 2019/9/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85072307421&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.9b01939
DO - 10.1021/acs.jpclett.9b01939
M3 - Article
C2 - 31434477
AN - SCOPUS:85072307421
SN - 1948-7185
VL - 10
SP - 5193
EP - 5199
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 17
ER -