Using lead chalcogenide nanocrystals as spin mixers: a perspective on near-infrared-to-visible upconversion

Dalton Transactions : an International Journal of Inorganic Chemistry
Lea NienhausMoungi G Bawendi

Abstract

The process of upconversion leads to emission of photons higher in energy than the incident photons. Near-infrared-to-visible upconversion, in particular, shows promise in sub-bandgap sensitization of silicon and other optoelectronic materials, resulting in potential applications ranging from photovoltaics that exceed the Shockley-Queisser limit to infrared imaging. A feasible mechanism for near-infrared-to-visible upconversion is triplet-triplet annihilation (TTA) sensitized by colloidal nanocrystals (NCs). Here, the long lifetime of spin-triplet excitons in the organic materials that undergo TTA makes upconversion possible under incoherent excitation at relatively low photon fluxes. Since this process relies on optically inactive triplet states, semiconductor NCs are utilized as efficient spin mixers, absorbing the incident light and sensitizing the triplet states of the TTA material. The state-of-the-art system uses rubrene with a triplet energy of 1.14 eV as the TTA medium, and thus allows upconversion of light with photon energies above ∼1.1 eV. In this perspective, we review the field of lead sulfide (PbS) NC-sensitized near-infrared-to-visible upconversion, discuss solution-based upconversion, and highlight progress made...Continue Reading

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Citations

Feb 23, 2019·Chemical Communications : Chem Comm·Pavel MorozMikhail Zamkov
Mar 20, 2020·PloS One·Sarah Wieghold, Lea Nienhaus
Sep 3, 2020·The Journal of Chemical Physics·Alexander S BieberLea Nienhaus
Mar 28, 2020·Physical Chemistry Chemical Physics : PCCP·Edvinas RadiunasKarolis Kazlauskas
Dec 15, 2020·Nanoscale·Benedicta SherrieLaszlo Frazer
Apr 10, 2021·The Journal of Physical Chemistry Letters·Daniel T YonemotoFelix N Castellano
Apr 2, 2019·ACS Applied Materials & Interfaces·Anna L HagstromJae-Hong Kim
Jun 28, 2019·The Journal of Physical Chemistry Letters·Sarah WiegholdLea Nienhaus
Nov 22, 2019·The Journal of Physical Chemistry Letters·Christian J ImperialeMark W B Wilson
Nov 11, 2020·Journal of the American Chemical Society·Runchen LaiKaifeng Wu
May 24, 2019·The Journal of Physical Chemistry Letters·Nadav GevaMoungi G Bawendi

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Methods Mentioned

BETA
FRET

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