Ligand enhanced upconversion of near-infrared photons with nanocrystal light absorbers

Chemical Science
Zhiyuan HuangMing L Tang

Abstract

We designed and synthesized a tetracene derivative 4-(tetracen-5-yl)benzoic acid (CPT) as a transmitter ligand used in PbS/PbSe nanocrystal (NC) sensitized upconversion of near infrared (NIR) photons. Under optimal conditions, comparing CPT functionalized NCs with unfunctionalized NCs as sensitizers, the upconversion quantum yield (QY) was enhanced 81 times for 2.9 nm PbS NCs from 0.021% to 1.7%, and 11 times for 2.5 nm PbSe NCs from 0.20% to 2.1%. The surface density of CPT controls the solubility of functionalized NCs and the upconversion QY. By increasing the concentration of CPT in the ligand exchange solution, the number of CPT ligand per NC increases. The upconversion QY is maximized at a transmitter density of 1.2 nm-2 for 2.9 nm PbS, and 0.32 nm-2 for 2.5 nm PbSe. Additional transmitter ligands inhibit photon upconversion due to triplet-triplet annihilation (TTA) between two neighboring CPT molecules on the NC surface. 2.1% is the highest reported QY for TTA-based photon upconversion in the NIR with the use of earth-abundant materials.

References

Oct 26, 2007·Journal of the American Chemical Society·Astrid M MüllerChristopher J Bardeen
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Nov 13, 2008·Journal of the American Chemical Society·Tanya N Singh-RachfordFelix N Castellano
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Citations

Sep 24, 2020·The Journal of Chemical Physics·Emily M RigsbyMing Lee Tang
Oct 4, 2017·Chemical Science·Victor GrayMing Lee Tang
Nov 16, 2017·Angewandte Chemie·Zhiyuan HuangMing Lee Tang
Dec 14, 2018·Chemical Society Reviews·Ang LiJinlong Gong
Mar 2, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Lea NienhausMoungi G Bawendi
Apr 6, 2017·Chemical Communications : Chem Comm·Xin Li, Ming Lee Tang
Sep 22, 2020·Chemical Society Reviews·Pankaj BharmoriaKasper Moth-Poulsen
Jul 31, 2019·Chemical Science·Zihao XuTianquan Lian
Jun 11, 2019·Journal of the American Chemical Society·Zhiyuan HuangTianquan Lian
Jul 31, 2018·The Journal of Physical Chemistry Letters·Biplab JoarderNobuo Kimizuka
Nov 1, 2016·Nano Letters·Melika MahboubMing Lee Tang
Jun 24, 2017·Journal of the American Chemical Society·Zhiyuan Huang, Ming L Tang
Aug 2, 2016·ACS Applied Materials & Interfaces·Cédric MonginFelix N Castellano
May 11, 2016·The Journal of Physical Chemistry Letters·Xin LiMing L Tang
Jun 26, 2018·Journal of the American Chemical Society·Taku OgawaNobuo Kimizuka
Jun 30, 2016·Journal of the American Chemical Society·Shogo AmemoriNobuo Kimizuka
Nov 2, 2018·The Journal of Physical Chemistry Letters·Zhiyuan Huang, Ming Lee Tang
Sep 25, 2020·Journal of the American Chemical Society·Zhiyuan HuangMing Lee Tang

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