DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Anthracene Diphosphate Ligands for CdSe Quantum Dots; Molecular Design for Efficient Upconversion

Journal Article · · Chemistry of Materials

Quantum dot (QD)-sensitized photon upconversion follows a multi-step energy transfer process from the QD to transmitter ligand to a soluble annihilator. Using a novel 10-R-anthracene-1,8-diphosphoric acid (R = octyl, 2- hexyldecyl, phenyl) ligand with high binding affinity for CdSe QD surfaces, we demonstrate a photon upconversion process that is limited by the transmitter to annihilator transfer efficiency. Using 1H NMR spectroscopy, we demonstrate that these bidentate diphosphate ligands rapidly and irreversibly displace two carboxylate ligands. These ligands mediate energy transfer from the photoexcited QDs to a triplet annihilator (1,10-diphenylanthracene), producing overall photon upconversion quantum efficiencies as high as 17%, the highest for QDs with no shells. In conclusion, transient absorption spectroscopy shows that the anthracene dihydrogen phosphate (ADP) ligand supports a 3.4 fold longer triplet state lifetime compared to 9-anthracene carboxylic acid (299.9 ± 9.5 vs 88.2 ± 2.1 μs), increasing the probability of energy transfer.

Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0008798; SC0018969
OSTI ID:
1773896
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 4 Vol. 32; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (35)

Electrochemical Multiplexing: Control over Surface Functionalization by Combining a Redox-Sensitive Alkyne Protection Group with “Click”-Chemistry journal January 2019
Synthesis of Metal-Selenide Nanocrystals Using Selenium Dioxide as the Selenium Precursor journal October 2008
Complementary Lock-and-Key Ligand Binding of a Triplet Transmitter to a Nanocrystal Photosensitizer journal April 2017
PbS/CdS Core-Shell Quantum Dots Suppress Charge Transfer and Enhance Triplet Transfer journal November 2017
Triplet Sensitization by Lead Halide Perovskite Thin Films for Efficient Solid-State Photon Upconversion at Subsolar Fluxes journal September 2019
Nanocrystal Size and Quantum Yield in the Upconversion of Green to Violet Light with CdSe and Anthracene Derivatives journal October 2015
Quantifying Ligand Exchange Reactions at CdSe Nanocrystal Surfaces journal June 2016
Probing Solvent–Ligand Interactions in Colloidal Nanocrystals by the NMR Line Broadening journal July 2018
A Versatile Coordinating Ligand for Coating Semiconductor, Metal, and Metal Oxide Nanocrystals journal September 2018
Synthesis of Phosphonic Acid Ligands for Nanocrystal Surface Functionalization and Solution Processed Memristors journal October 2018
Nanomaterials for In Vivo Imaging journal January 2017
Delayed Molecular Triplet Generation from Energized Lead Sulfide Quantum Dots journal March 2017
Surface Traps in Colloidal Quantum Dots: A Combined Experimental and Theoretical Perspective journal October 2017
Visible-to-Ultraviolet Upconversion Efficiency above 10% Sensitized by Quantum-Confined Perovskite Nanocrystals journal August 2019
Amino Acid-Based Stabilization of Oxide Nanocrystals in Polar Media: From Insight in Ligand Exchange to Solution 1 H NMR Probing of Short-Chained Adsorbates journal February 2016
Hybrid Molecule–Nanocrystal Photon Upconversion Across the Visible and Near-Infrared journal July 2015
Control of Energy Flow Dynamics between Tetracene Ligands and PbS Quantum Dots by Size Tuning and Ligand Coverage journal January 2018
Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals journal July 2003
A Solution NMR Toolbox for Characterizing the Surface Chemistry of Colloidal Nanocrystals journal February 2013
Reaction Chemistry and Ligand Exchange at Cadmium−Selenide Nanocrystal Surfaces journal September 2008
Designing Transmitter Ligands That Mediate Energy Transfer between Semiconductor Nanocrystals and Molecules journal June 2017
Finding and Fixing Traps in II–VI and III–V Colloidal Quantum Dots: The Importance of Z-Type Ligand Passivation journal October 2018
Enhanced Near-Infrared-to-Visible Upconversion by Synthetic Control of PbS Nanocrystal Triplet Photosensitizers journal June 2019
Triplet Sensitization by “Self-Trapped” Excitons of Nontoxic CuInS 2 Nanocrystals for Efficient Photon Upconversion journal August 2019
A Citric Acid-Derived Ligand for Modular Functionalization of Metal Oxide Surfaces via “Click” Chemistry journal December 2011
Synthesis and Micrometer-Scale Assembly of Colloidal CdSe/CdS Nanorods Prepared by a Seeded Growth Approach journal October 2007
Thermally activated delayed photoluminescence from pyrenyl-functionalized CdSe quantum dots journal December 2017
Photoredox catalysis using infrared light via triplet fusion upconversion journal January 2019
Liquid crystals containing a 2,6-disubstituted anthracene core—mesomorphism, charge transport and photochemical properties journal January 2003
Low power, non-coherent sensitized photon up-conversion: modelling and perspectives journal January 2012
Ligand enhanced upconversion of near-infrared photons with nanocrystal light absorbers journal January 2016
Triplet sensitization by perovskite nanocrystals for photon upconversion journal January 2017
Effect of substituent on the behaviour of the excited singlet and triplet states in carbonyl derivatives of anthracene of the type 9-X·CO·A journal January 1982
SYNTHESIS OF HYDROLYTICALLY STABLE tert -BUTYLDIMETHYLSILYL ETHERS OF HYDROXYANTHRAQUINONES journal June 1996
Direct observation of triplet energy transfer from semiconductor nanocrystals journal January 2016