Improving the data transmission rates for optical wireless communication by surface passivation of CsPbBr<sub>3</sub> quantum dots
Quantum dots (QDs) preserve short photoluminescence (PL) lifetime and are widely developed for optical wireless communication (OWC). However, QDs often suffer from surface defects that limit their performance. In this work, we investigate the impact of post-treatment with didodecyldimethylammonium bromide (DDAB) and <i>P</i><i>b</i><i>B</i><i>r</i><sub>2</sub> on the OWC performance of <i>C</i><i>s</i><i>P</i><i>b</i><i>B</i><i>r</i><sub>3</sub> QDs. The treatment significantly improves the PL properties, leading to an increased quantum yield of 98% and a prolonged PL lifetime of 1.24 times compared to untreated QDs. As a consequence, the -3<i>d</i><i>B</i> bandwidth and maximum data transmission rates under on-off-keying (OOK) modulation are also enhanced, reaching 0.79 and 1.15 times those of pristine QDs, respectively. This improvement highlights the importance of surface passivation for optimizing <i>C</i><i>s</i><i>P</i><i>b</i><i>B</i><i>r</i><sub>3</sub> QDs in OWC applications.
Authors
- Jingzhou Li
- Beiping Tan (ORCID: https://orcid.org/0000-0003-0075-3566)
- Wei Xiong (ORCID: https://orcid.org/0000-0003-2095-041X)
- Zhenhua Wang (ORCID: https://orcid.org/0000-0002-6902-1059)
- Leimin Deng (ORCID: https://orcid.org/0000-0002-3361-8822)
- Xin Zhan (ORCID: https://orcid.org/0000-0001-9446-660X)
- Zhijie Zhang (ORCID: https://orcid.org/0009-0004-5943-4257)
Institutions
- California Maritime Academy (US)
- Fiberhome Technology Group (China) (CN)
- University of Chinese Academy of Sciences (CN)
- Huazhong University of Science and Technology (CN)
Publication Details
- Journal
- Applied Optics
- Published
- 2025-03-22
- DOI
- https://doi.org/10.1364/ao.561909
- Primary Topic
- Photonic and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.00