Journal article
Very Robust Spray-Synthesized CsPbI 3 Quantum Emitters with Ultrahigh Room-Temperature Cavity-Free Brightness and Self-Healing Ability
ACS nano, v 15(7), pp 11358-11368
27 Jul 2021
PMID: 33729770
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Although colloidal lead halide perovskite quantum dots (PQDs) exhibit desirable emitter characteristics with high quantum yields and narrow bandwidths, instability has limited their applications in devices. In this paper, we describe spray-synthesized CsPbI
PQD quantum emitters displaying strong photon antibunching and high brightness at room temperature and stable performance under continuous excitation with a high-intensity laser for more than 24 h. Our PQDs provided high single-photon emission rates, exceeding 9 × 10
count/s, after excluding multiexciton emissions and strong photon antibunching, as confirmed by low values of the second-order correlation function
(0) (reaching 0.021 and 0.061 for the best and average PQD performance, respectively). With such high brightness and stability, we applied our PQDs as quantum random number generators, which demonstrably passed all of the National Institute of Standards and Technology's randomness tests. Intriguingly, all of the PQDs exhibited self-healing behavior and restored their PL intensities to greater than half of their initial values after excitation at extremely high intensity. Half of the PQDs even recovered almost all of their initial PL intensity. The robust properties of these spray-synthesized PQDs resulted from high crystallinity and good ligand encapsulation. Our results suggest that spray-synthesized PQDs have great potential for use in future quantum technologies (
., quantum communication, quantum cryptography, and quantum computing).
Metrics
Details
- Title
- Very Robust Spray-Synthesized CsPbI 3 Quantum Emitters with Ultrahigh Room-Temperature Cavity-Free Brightness and Self-Healing Ability
- Creators
- Bo-Wei Hsu - National Tsing Hua UniversityYung-Tang Chuang - National Tsing Hua UniversityChun-Yuan Cheng - National Tsing Hua UniversityChien-Yu Chen - Department of Chemistry, Northwestern University, Evanston, Illinois 60208 United StatesYen-Ju Chen - National Tsing Hua UniversityAlexandra Brumberg - Northwestern UniversityLin Yang - National Tsing Hua UniversityYu-Sheng Huang - National Tsing Hua UniversityRichard D Schaller - Northwestern UniversityLih-J Chen - National Tsing Hua UniversityChih-Sung Chuu - National Tsing Hua UniversityHao-Wu Lin - National Tsing Hua University
- Publication Details
- ACS nano, v 15(7), pp 11358-11368
- Publisher
- AMER CHEMICAL SOC; WASHINGTON
- Number of pages
- 11
- Grant note
- Ministry of Science and Technology of Taiwan: 110-2636-E-007-022, 109-2634-F-007-023, 107-2112-M-007-004-MY3 National Science Foundation Graduate Research Fellowship Program: DGE-1842165 U.S. Department of Energy, Office of Science: DE-AC02-06CH11357
We thank the Ministry of Science and Technology of Taiwan (Grant Nos. 110-2636-E-007-022, 109-2634-F-007-023, and 107-2112-M-007-004-MY3) for financial support. A.B. is supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1842165. This work was performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000679406500034
- Scopus ID
- 2-s2.0-85103797060
- Other Identifier
- 991022053868104721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology