Realization of long-term stable lasing from all-inorganic perovskite supercrystals is highly desirable for practical applications in optoelectronic devices. However, lasing from perovskite supercrystals excited by continuous wave laser light remains a challenge due to the photoluminescence degradation induced by thermal accumulation. Here, we report highly stable lasing with low threshold fom a CsPbClBr 2 supercrystal placed on a thin Ag film, which form a CsPbClBr 2 /Ag microcavity, by managing the thermal distribution inside the CsPbClBr 2 supercrystal. Combined numerical simulations and lifetime measurements, the localized electric field in such a hybrid microcavity leads to a spatially localized temperature distribution, which plays a crucial role in suppressing the thermal accumulation on the surface and in eliminating non-radiative recombination defects. The effective thermal management in the hybrid microcavity renders highly stable lasing with low threshold under the irradiation of continuouw wave laser light. Our findings provide a feasible and universal approach to the development of long-term stable perovskite laser.
Solid-state laser lighting has gradually become dominant in the display and illumination market, benefiting from its high efficiency and ultrahigh luminescence properties. Herein, by intelligently designing glass components and minor BN addition, a high-transparency and heat-resistant phosphor-in-glass film (PiGF) (a zero-thermal-quenching phenomenon) is realized. Further, in an attempt to take into account both the excellent luminous performance and the high quality of the light colors, a uniquely designed tricolor pattern of PiGF (THP-PiGF) was fabricated as an alternative to high-power white laser illumination. Under the excitation of a 450 nm blue laser diode (LD), a luminous efficiency (LE) of 159.87 lm/W with high color rendering index (CRI = 87.2) is achieved at 9.32 W/mm2. THP-PiGF with ultrahigh thermal conductivity (16.984 W/(m K)) can withstand a long operation time of 300 min under constant incident blue laser illumination. With respect to practical applications, a high-power laser module (maximum power 74 W) is assembled with the unique PiGF which can emit an interesting THP. These contributions can substantially drive the development of state-of-the-art laser light illumination.
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