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Huang HY, Cai KB, Chang LY, et al. Eco-friendly luminescent solar concentrators with low reabsorption losses and resistance to concentration quenching based on aqueous-solution-processed thiolate-gold nanoclusters. Nanotechnology. 2017;28(37):375702doi: 10.1088/1361-6528/aa7e1f.
Huang, H. Y., Cai, K. B., Chang, L. Y., Chen, P. W., Lin, T. N., Lin, C. A. J., Shen, J. L., Talite, M. J., Chou, W. C., & Yuan, C. T. (2017). Eco-friendly luminescent solar concentrators with low reabsorption losses and resistance to concentration quenching based on aqueous-solution-processed thiolate-gold nanoclusters. Nanotechnology, 28(37), 375702. https://doi.org/10.1088/1361-6528/aa7e1f
Huang, H Y, et al. "Eco-friendly luminescent solar concentrators with low reabsorption losses and resistance to concentration quenching based on aqueous-solution-processed thiolate-gold nanoclusters." Nanotechnology vol. 28,37 (2017): 375702. doi: https://doi.org/10.1088/1361-6528/aa7e1f
Huang HY, Cai KB, Chang LY, Chen PW, Lin TN, Lin CAJ, Shen JL, Talite MJ, Chou WC, Yuan CT. Eco-friendly luminescent solar concentrators with low reabsorption losses and resistance to concentration quenching based on aqueous-solution-processed thiolate-gold nanoclusters. Nanotechnology. 2017 Sep 15;28(37):375702. doi: 10.1088/1361-6528/aa7e1f. Epub 2017 Jul 06. PMID: 28682300.
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Nanotechnology. 2017 Sep 15;28(37):375702. doi: 10.1088/1361-6528/aa7e1f. Epub 2017 Jul 06.

Eco-friendly luminescent solar concentrators with low reabsorption losses and resistance to concentration quenching based on aqueous-solution-processed thiolate-gold nanoclusters.

Nanotechnology

H Y Huang, K B Cai, L Y Chang, P W Chen, T N Lin, C A J Lin, J L Shen, M J Talite, W C Chou, C T Yuan

Affiliations

  1. Department of Physics, Chung Yuan Christian University, Taoyuan, Taiwan.

PMID: 28682300 DOI: 10.1088/1361-6528/aa7e1f

Abstract

Heavy-metal-containing quantum dots (QDs) with engineered electronic states have been served as luminophores in luminescent solar concentrators (LSCs) with impressive optical efficiency. Unfortunately, those QDs involve toxic elements and need to be synthesized in a hazardous solvent. Recently, biocompatible, eco-friendly gold nanoclusters (AuNCs), which can be directly synthesized in an aqueous solution, have gained much attention for promising applications in 'green photonics'. Here, we explored the solid-state photophysical properties of aqueous-solution-processed, glutathione-stabilized gold nanoclusters (GSH-AuNCs) with a ligand-to-metal charge-transfer (LMCT) state for developing 'green' LSCs. We found that such GSH-AuNCs exhibit a large Stokes shift with almost no spectral overlap between the optical absorption and PL emission due to the LMCT states, thus, suppressing reabsorption losses. Compared with GSH-AuNCs in solution, the photoluminescence quantum yields (PL-QYs) of the LSCs can be enhanced, accompanied with a lengthened PL lifetime owing to the suppression of non-radiative recombination rates. In addition, the LSCs do not suffer from severe concentration-induced PL quenching, which is a common weakness for conventional luminophores. As a result, a common trade-off between light-harvesting efficiency and solid-state PL-QYs can be bypassed due to nearly-zero spectral overlap integral between the optical absorption and PL emission. We expect that GSH-AuNCs hold great promise for serving as luminophores for 'green' LSCs by further enhancing solid-state PL-QYs.

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