Aggregation-Induced Enhanced Red Emission Graphene Quantum Dots for Integrated Fabrication of Luminescent Solar Concentrators
Graphene quantum dots (GQDs) commonly suffer from the fluorescence problem of aggregation-caused quenching under high-concentration loading or in the solid state, which seriously hinders the application. Here we report a type of GQDs with red aggregation-induced enhanced emission (AIEE). It is confirmed that the aggregation state of the AIEE GQDs is a J-aggregate. The GQDs/poly(methyl methacrylate) film presented a photoluminescence quantum yield as high as 60.81%, and the record-high performance of luminescent solar concentrators (LSCs) was achieved. The power conversion efficiency (η<sub><i>PCE</i></sub>) is up to 8.35% and the external optical efficiency (η<sub><i>ext</i></sub>) is ∼8.99% for the GQD-based LSCs (45 mW/cm<sup>2</sup>). Even under one sun illumination (100 mW/cm<sup>2</sup>), the corresponding η<sub><i>PCE</i></sub> and η<sub><i>ext</i></sub> values are 3.12% and 4.52%, respectively. The internal photon efficiency (η<sub><i>int</i></sub>) of an LSC device is about 5.02%. The synthesis of AIEE GQDs bridges the research gap in the emission mechanism of AIEE in GQDs.
Authors
- Xiao Nan Gong (ORCID: https://orcid.org/0000-0002-5513-5354)
- Jiurong Li (ORCID: https://orcid.org/0000-0003-3552-0797)
- Haiguang Zhao (ORCID: https://orcid.org/0000-0003-1057-9522)
- Xiujian Zhao (ORCID: https://orcid.org/0000-0002-2517-2605)
Institutions
- Qingdao University (CN)
- Wuhan University of Technology (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-09-09
- DOI
- https://doi.org/10.1021/acs.nanolett.4c03412
- Citations
- 12
- Primary Topic
- Carbon and Quantum Dots Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.41
Funders
- National Natural Science Foundation of China
- Higher Education Discipline Innovation Project