Composition‐Graded Perovskite Microwire Toward Broad Wavelength Tunable Single‐Mode Lasing
Abstract Continuously manipulating the resonant wavelength of lasing modes within a large spectral range is of great significance for expanding device functionality. Here, to synthesize a single CsPbCl x Br 3‐x perovskite microwire with the energy bandgap gradient spanning from 2.33 to 2.83 eV along the length direction defined as the axis by using the vapor‐phase anion exchange method is proposed. A high‐quality (≈10 3 ), wide range (≈60 nm), and continuously tunable single‐mode laser is achieved in as‐prepared perovskite microwire alloy, which provides both gain media and microresonator. Simultaneously, the exciton recombination dynamics and atomic‐scale interdiffusion mechanisms at different components are clarified through time‐resolved photoluminescence (PL) spectra and theoretical calculations. The vacancy defects have a significant impact on the interdiffusion of halogen anions, excitonic recombination lifetime, and fluorescence quantum efficiency. The work provides a new strategy for the construction of new‐type broadband tunable lasers and high‐precision microspectrometers.
Authors
- Junfeng Lu (ORCID: https://orcid.org/0000-0001-6458-7734)
- Meili Li (ORCID: https://orcid.org/0000-0002-9319-7601)
- Sihao Xia (ORCID: https://orcid.org/0000-0001-7760-8952)
- Xiao‐Peng He (ORCID: https://orcid.org/0000-0002-8736-3511)
- Yizhi Zhu (ORCID: https://orcid.org/0000-0002-8673-0535)
- Caofeng Pan (ORCID: https://orcid.org/0000-0001-6327-9692)
- Caixia Kan (ORCID: https://orcid.org/0000-0003-3722-422X)
- Fangtao Li (ORCID: https://orcid.org/0000-0002-8180-9156)
- Chaoyang Huang
- Juan Xu (ORCID: https://orcid.org/0000-0001-7109-2190)
- Chunxiang Xu
- Linglong Zhang (ORCID: https://orcid.org/0000-0001-7930-6480)
- Yanda Ji
- Xiaoxuan Wang (ORCID: https://orcid.org/0000-0001-6563-1952)
Institutions
- Xinyang Normal University (CN)
- Chinese Academy of Sciences (CN)
- Beijing Institute of Nanoenergy and Nanosystems (CN)
- State Key Laboratory of Digital Medical Engineering (CN)
- Southeast University (CN)
- Beihang University (CN)
- Ministry of Industry and Information Technology (CN)
- Nanjing University of Aeronautics and Astronautics (CN)
Publication Details
- Journal
- Laser & Photonics Review
- Published
- 2024-08-05
- DOI
- https://doi.org/10.1002/lpor.202400555
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.63
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Jiangsu Province
- Fundamental Research Funds for the Central Universities