Open AccessOptically Switchable NIR Photoluminescence of PbS Semiconducting Nanocrystals using Diarylethene Photoswitches
Author(s) -
Lili Hou,
Rasmus Ringström,
Andrew B. Maurer,
Maria Abrahamsson,
Joakim Andréasson,
Bo Albinsson
Publication year - 2022
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.2c07102
Subject(s) - diarylethene , photoisomerization , photoluminescence , chemistry , photochemistry , photochromism , irradiation , photodarkening , nanocrystal , photoswitch , optoelectronics , visible spectrum , quenching (fluorescence) , energy transfer , nanotechnology , fluorescence , isomerization , optics , materials science , wavelength , chemical physics , organic chemistry , physics , fiber laser , nuclear physics , catalysis
Precisely modulated photoluminescence (PL) with external control is highly demanded in material and biological sciences. However, it is challenging to switch the PL on and off in the NIR region with a high modulation contrast. Here, we demonstrate that reversible on and off switching of the PL in the NIR region can be achieved in a bicomponent system comprised of PbS semiconducting nanocrystals (NCs) and diarylethene (DAE) photoswitches. Photoisomerization of DAE to the ring-closed form upon UV light irradiation causes substantial quenching of the NIR PL of PbS NCs due to efficient triplet energy transfer. The NIR PL fully recovers to an on state upon reversing the photoisomerization of DAE to the ring-open form with green light irradiation. Importantly, fully reversible switching occurs without obvious fatigue, and the high PL on / off ratio (>100) outperforms all previously reported assemblies of NCs and photoswitches.
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