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Wavelength-Tunable and Highly Stable Perovskite-Quantum-Dot-Doped Lasers with Liquid Crystal Lasing Cavities

Lin‐Jer ChenDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanJia-Heng DaiDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanJia‐De LinDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanTing‐Shan MoDepartment of Electronic Engineering, Kun Shan University of Technology, Tainan 710, TaiwanHong‐Ping LinDepartment of Chemistry, National Cheng Kung University, Tainan 701, TaiwanHui-Chen YehGraduate Institute of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 824, TaiwanYu-Chou ChuangDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanShun‐An JiangDepartment of Photonics, National Cheng Kung University, Tainan 701, TaiwanChia‐Rong LeeDepartment of Photonics, National Cheng Kung University, Tainan 701, Taiwan

2018en

ABI

Annotatsiya

This study applies a low-cost solvothermal method to synthesize all-inorganic (lead-free cesium tin halide) perovskite quantum dots (AIPQDs) and to fabricate AIPQD-doped lasers with cholesteric liquid crystal (CLC) lasing cavities. The lasers present highly qualified lasing features of low threshold (150 nJ/pulse) and narrow line width (0.20 nm) that are attributed to the conjunction of the suppression of photoluminescence (PL) loss caused by the quantum confinement of AIPQDs and the amplification of PL caused by the band-edge effect of the CLC-distributed feedback resonator. In addition, the lasers possess highly flexible lasing-wavelength tuning features and a long-term stability under storage at room temperature and under high humidity given the protective role of CLC. These advantages are difficult to confer to typical light-emitting perovskite devices. Given these merits, the AIPQD-doped CLC laser device has considerable potential applications in optoelectronic and photonic devices, including lighting, displays, and lasers.

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Identifikatorlar

DOI: 10.1021/acsami.8b08474

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