Correction to Direct vs Delayed Triplet Energy Transfer from Organic Semiconductors to Quantum Dots and Implications for Luminescent Harvesting of Triplet Excitons

Gray, Victor; Allardice, Jesse R.; Zhang, Zhilong; Dowland, Simon; Xiao, James; Petty, Anthony; Anthony, John E.; Rao, Akshay

doi:10.1021/acsnano.0c06432

Cited by 2 publications

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“…The acenes, particularly pentacene and tetracene, have dominated iSF studies. , However, the relatively low triplet energies of pentacene (0.81 eV) and tetracene (1.25 eV) prevent effective incorporation into silicon photovoltaic devices. While the band gap of silicon is 1.1 eV, accounting for energetic losses in the triplet harvesting process, the ideal triplet energy of the SF component material in a photon multiplier system is 1.4–1.5 eV …”

Section: Introductionmentioning

confidence: 99%

Soluble Diphenylhexatriene Dimers for Intramolecular Singlet Fission with High Triplet Energy

et al. 2023

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Intramolecular singlet fission (iSF) facilitates single-molecule exciton multiplication, converting an excited singlet state to a pair of triplet states within a single molecule. A critical parameter in determining the feasibility of SF-enhanced photovoltaic designs is the triplet energy; many existing iSF materials have triplet energies too low for efficient transfer to silicon via a photon multiplier scheme. In this work, a series of six novel dimers based upon the high-triplet-energy, SF-active chromophore, 1,6-diphenyl-1,3,5-hexatriene (DPH) [E(T 1 ) ∼ 1.5 eV], were designed, synthesized, and characterized. Transient absorption spectroscopy and fluorescence lifetime studies reveal that five of the dimers display iSF activity, with time constants for singlet fission varying between 7 ± 2 ps and 2.2 ± 0.2 ns and a high triplet yield of 163 ± 63% in the best-performing dimer. A strong dependence of the rate of fission on the coupling geometry is demonstrated. For optimized iSF behavior, close spatial proximity and minimal through-bond communication are found to be crucial for balancing the rate of SF against the reverse recombination process.

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Section: Introductionmentioning

confidence: 99%

Soluble Diphenylhexatriene Dimers for Intramolecular Singlet Fission with High Triplet Energy

et al. 2023

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“…4,9 These materials are challenged by relatively low triplet energies, 10,11 which create a barrier toward feasible incorporation with silicon photovoltaic devices. 12 In consideration of the limitation of low triplet energy materials, recent work in our group has demonstrated iSF activity in phenylene-bridged dimers based upon the higher triplet energy chromophore diphenylhexatriene (DPH). 13 The best-performing material in that study, o-(mDPH) 2 , successfully achieved fast and efficient iSF.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and intramolecular singlet fission properties of ortho-phenylene linked oligomers of diphenylhexatriene

Millington,

Sharma,

Montanaro

et al. 2023

Chem. Sci.

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Correction to Direct vs Delayed Triplet Energy Transfer from Organic Semiconductors to Quantum Dots and Implications for Luminescent Harvesting of Triplet Excitons

Cited by 2 publications

References 0 publications

Soluble Diphenylhexatriene Dimers for Intramolecular Singlet Fission with High Triplet Energy

Soluble Diphenylhexatriene Dimers for Intramolecular Singlet Fission with High Triplet Energy

Synthesis and intramolecular singlet fission properties of ortho-phenylene linked oligomers of diphenylhexatriene

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