Self-trapped exciton-based photoluminescence in gold-doped silver nanoclusters embedded in PVP matrix

Russel Sevilla; Ruth Jeane Soebroto; Hsiu-Ying Huang; Chi-Tsu Yuan

doi:10.1117/12.3016125

18 June 2024 Self-trapped exciton-based photoluminescence in gold-doped silver nanoclusters embedded in PVP matrix

Russel Sevilla, Ruth Jeane Soebroto, Hsiu-Ying Huang, Chi-Tsu Yuan

Proceedings Volume 13014, Photonics for Solar Energy Systems X; 1301408 (2024) https://doi.org/10.1117/12.3016125
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

Luminescent solar concentrator (LSC) is an optoelectronic device which converts direct and diffused sunlight into electricity when coupled with photovoltaic (PV) cells around its edge. Large Stokes shift is beneficial to minimize the reabsorption loss and improve the overall efficiency of LSCs. In this study, the fabricated Gold-doped silver nanoclusters embedded in Polyvinylpyrrolidone (Au-AgNCs@PVP) matrix exhibited significantly large Stokes shift of about ~200nm with spectral overlap integral of 0.03 and Urbach tail observed on the absorption spectra along ~480 to 600nm. This is a typical behavior of emissions from self-trapped excitons (STEs) due to the lattice distortion caused by a strong exciton-phonon coupling. The strong coupling is evident by having small steepness constant around ~0.32 extracted from the temperature dependent Urbach energy, thus, proving the photoluminescence originating from STEs.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Russel Sevilla, Ruth Jeane Soebroto, Hsiu-Ying Huang, and Chi-Tsu Yuan "Self-trapped exciton-based photoluminescence in gold-doped silver nanoclusters embedded in PVP matrix", Proc. SPIE 13014, Photonics for Solar Energy Systems X, 1301408 (18 June 2024); https://doi.org/10.1117/12.3016125

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