Abstract
Triplet energy transfer between inorganic quantum dots (QDs) and organic materials plays a fundamental role in many optoelectronic applications based on these nanocomposites. Attaching organic molecules to the QD as transmitter ligands has been shown to facilitate transfer both to and from QDs. Here we show that the often disregarded thiol anchoring group can achieve quantitative triplet energy transfer yields in a PbS QD system with 6,11-bis[(triisopropylsilyl)ethynyl]tetracene-2-methylthiol (TET-SH) ligands. We demonstrate efficient triplet transfer in a singlet fission-based photon multiplication system with 5,12-bis[(triisopropylsilyl)ethynyl]tetracene generating triplets in solution that transfer to the PbS QDs via the thiol ligand TET-SH. Importantly, we demonstrate the increased thermal stability of the PbS/TET-SH system, compared to the traditional carboxylic acid counterpart, allowing for higher photoluminescence quantum yields.
| Original language | English |
|---|---|
| Pages (from-to) | 7239-7244 |
| Number of pages | 6 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 11 |
| Issue number | 17 |
| DOIs | |
| State | Published - Sep 3 2020 |
Bibliographical note
Publisher Copyright:Copyright © 2020 American Chemical Society.
Funding
The authors thank the Winton Programme for the Physics of Sustainability and the Engineering and Physical Sciences Research Council for funding. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement 758826). V.G. acknowledges funding from the Swedish research council (Vetenskapsrådet 2018-00238). J.R.A. acknowledges the Cambridge Commonwealth European and International Trust for financial support. Z.Z. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Actions grant (842271, TRITON project). J.X. acknowledges EPSRC Cambridge NanoDTC (EP/L015978/1) for financial support. A.M.A. acknowledges the support of the Engineering and Physical Sciences Research Council (EPSRC) for funding under Grant EP/L015552/1. J.E.A.’s synthesis of materials was supported by the U.S. National Science Foundation under Cooperative Agreement 1849213.
| Funders | Funder number |
|---|---|
| Gates Cambridge Trust | |
| H2020 European Research Council | |
| Horizon 2020 Framework Programme | 758826 |
| H2020 Marie Skłodowska-Curie Actions | 842271, EP/L015552/1, EP/L015978/1 |
| Vetenskapsrådet | 2018-00238 |
| National Science Foundation Arctic Social Science Program | 1849213 |
| UK Medical Research Council, Engineering and Physical Sciences Research Council | EP/P007767/1, EP/L015552/1 |
ASJC Scopus subject areas
- General Materials Science
- Physical and Theoretical Chemistry