Optical Study of Biocompatible Nanomaterials for Solar Energy Harvesting
Maria Jessabel Talite1*, Hsiu-Ying Huang2, Kun-Bin Cai2, Wu-Ching Chou1, Chi-Tsu Yuan2
1Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
2Physics, Chung Yuan Christian University, Taoyuan, Taiwan
* Presenter:Maria Jessabel Talite, email:jessatalite@gmail.com
Luminescent solar concentrators (LSCs) are light-management devices that collect the sunlight output upon absorption of incident photons by any luminescent materials. The photons are then re-emitted into a glass waveguides directed onto substrate edges where photovoltaic cells are mounted. This study mainly focus on the investigation of solid-state photophysical properties of biocompatible nanomaterials named specifically thiolated gold-nanoclusters (GSH-AuNCs) and silane-functionalized carbon nanodots (Si-CNDs) under different loadings conditions to reduce concentration-induced quenching, aggregation-induced scattering, and reabsorption losses, which are relevant for LSC operation. The fabricated LSCs based on environmental-friendly nanomaterials harvested high solid-state photoluminescence quantum yields (PL-QY) of ~40% and ~25% for Si-CNDs LSCs and GSH-AuNCs, correspondingly. The performance of Si-CNDs LSCs reached ∼22% Internal Quantum Efficiency (IQE) and ∼12% External Quantum Efficiency (EQE) at the excitation wavelength of ∼354 nm while the GSH-AuNCs LSCs displayed remarkable ~17.5% IQE and ~1.85% EQE values.

Keywords: gold nanoclusters, carbon nanodots, luminescent solar concentrators