TY - CONF

T1 - Efficient light harvesting in dye-polymer mixtures

AU - Doyle, Sam

AU - Chintakuntla, Hemali

AU - Manning, Jake

AU - Danos, Lefteris

PY - 2024/7/2

Y1 - 2024/7/2

N2 - Light harvesting is the process by which the absorption ability of the photosynthetic reaction complex increases significantly via a series of excitation energy transfer steps from an array of pigments surrounding the reaction centre. A strong dipole-dipole interaction and a significant spectral overlap between the pigments are important for efficient non-radiative energy transfer before the excitation energy gets lost in other dissipative processes.1 The key consideration in the design of light-harvesting structures is to maintain a close intermolecular separation for a high efficiency of excitation energy transfer while minimising self-quenching of fluorescence or non-radiative energy dissipation, which is common in dye containing solutions. The energy transfer from a donor to an acceptor depends strongly on the orientation and spectral properties of the supramolecular ‘architecture’ of the system in which this energy transfer takes place. In this presentation spin coated dye-polymer mixtures have been developed that can exhibit long range energy transfer with high donor to acceptor ratios. For this work, two different organic dyes (perylene/oxazine) have been prepared mixed in different ratios (1:1) up to (100:1). A perylene dye has been tested for efficient homo-energy transfer between the same molecular dyes with the aim to create a long exciton diffusion The dye-polymer mixtures are characterised with state-of-the-art steady state and time-resolved fluorescence spectroscopy.

AB - Light harvesting is the process by which the absorption ability of the photosynthetic reaction complex increases significantly via a series of excitation energy transfer steps from an array of pigments surrounding the reaction centre. A strong dipole-dipole interaction and a significant spectral overlap between the pigments are important for efficient non-radiative energy transfer before the excitation energy gets lost in other dissipative processes.1 The key consideration in the design of light-harvesting structures is to maintain a close intermolecular separation for a high efficiency of excitation energy transfer while minimising self-quenching of fluorescence or non-radiative energy dissipation, which is common in dye containing solutions. The energy transfer from a donor to an acceptor depends strongly on the orientation and spectral properties of the supramolecular ‘architecture’ of the system in which this energy transfer takes place. In this presentation spin coated dye-polymer mixtures have been developed that can exhibit long range energy transfer with high donor to acceptor ratios. For this work, two different organic dyes (perylene/oxazine) have been prepared mixed in different ratios (1:1) up to (100:1). A perylene dye has been tested for efficient homo-energy transfer between the same molecular dyes with the aim to create a long exciton diffusion The dye-polymer mixtures are characterised with state-of-the-art steady state and time-resolved fluorescence spectroscopy.

M3 - Poster

T2 - International Conference on Nanosciences & Nanotechnologies (NN24)

Y2 - 2 July 2024 through 5 July 2024

ER -