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ACS photonics v.4 no.1, 2017년, pp.146 - 155   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Whispering Gallery Mode Lasing from Self-Assembled Hexagonal Perovskite Single Crystals and Porous Thin Films Decorated by Dielectric Spherical Resonators

Perumal, Packiyaraj (Department of Physics, National Taiwan University, Taipei 106, ) ; Wang, Cih-Su (Department of Physics, National Taiwan University, Taipei 106, ) ; Boopathi, Karunakara Moorthy (Research Center for Applied Sciences, Academia Sinica, Taipei 115, ) ; Haider, Golam (Department of Physics, National Taiwan University, Taipei 106, ) ; Liao, Wei-Cheng (Department of Physics, National Taiwan University, Taipei 106, ) ; Chen, Yang-Fang (Department of Physics, National Taiwan University, Taipei 106, ) ;
  • 초록  

    Lasing in self-assembled hybrid organic–inorganic lead halide perovskites semiconductors has attained intensive research for low cost and high performance optoelectronic devices due to their inherent outstanding optical response. However, to achieve the controllable laser action from a small single crystal remains as a challenging issue. Here, we present a novel technique to fabricate self-assembled high-quality hexagonal perovskite single crystals for realizing room-temperature near-infrared whispering-gallery-mode (WGM) laser action. Quite interestingly, the lasing spectrum for an individual CH 3 NH 3 PbI 3 hexagonal single crystals encompasses the aspects of high quality factor ( Q ) and low threshold WGM lasing around 1200 and 26.8 μJ/cm 2 , respectively. In addition, we demonstrate that when the porous perovskite thin films were decorated with dielectric spheres, the laser oscillation can be achieved through the coupling of WGM with perovskite gain material. We found that the lasing spectra can be well manipulated by the size of hexagonal single crystals and SiO 2 spheres. Moreover, the discovered laser action and chemical stability of hexagonal single crystal perovskites not only render them significant practical use in highly efficient near-infrared emitting devices for laser photonics, solid-state lighting, and display applications, but also provide a potential extension toward various optoelectronic devices. Graphic Abstract ACS Electronic Supporting Info


  • 주제어

    controllable laser action .   individual hexagonal perovskite single crystal .   solution process .   whispering-gallery-mode resonance.  

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