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Whispering Gallery Mode Lasing from CH3NH3PbBr3/PEO Composites Grown in a Microcapillary
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-01-23 , DOI: 10.1021/acs.jpcc.9b10272 Naho Kurahashi 1 , Hitoshi Mizuno 1 , Fumio Sasaki 2 , Hisao Yanagi 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-01-23 , DOI: 10.1021/acs.jpcc.9b10272 Naho Kurahashi 1 , Hitoshi Mizuno 1 , Fumio Sasaki 2 , Hisao Yanagi 1
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Methylammonium lead bromide (CH3NH3PbBr3)/poly(ethylene oxide) (PEO) composites are fabricated by a simple microcapillary method. The addition of PEO into a precursor solution of CH3NH3PbBr3 improves the morphology of perovskite crystals grown inside the microcapillary. Under optical pumping, depending on the inner diameter of the microcapillary (ϕ), whispering gallery mode (WGM) lasing is observed in CH3NH3PbBr3 with PEO, and the excitation density threshold of the lasing is lower than that in CH3NH3PbBr3 without PEO. With a reduction in ϕ, the mode number and the lasing threshold fluence decrease based on cavity quantum electrodynamics (cQED), and the time-resolved photoluminescence (PL) decay curve shows that the faster lifetime component is enhanced by the Purcell effect. These findings suggest that strong light confinement occurs in the CH3NH3PbBr3/PEO composites entirely filling the microcavity.
中文翻译：
在微毛细管中生长的CH 3 NH 3 PbBr 3 / PEO复合材料的耳语画廊模式激光发射
甲基铵溴化铅（CH 3 NH 3 PbBr 3）/聚环氧乙烷（PEO）复合材料是通过简单的微毛细管方法制备的。将PEO添加到CH 3 NH 3 PbBr 3的前体溶液中可改善微毛细管内部生长的钙钛矿晶体的形貌。在光泵浦下，根据微毛细管的内径（ϕ），在带有PEO的CH 3 NH 3 PbBr 3中观察到耳语画廊模式（WGM）激光，并且该激光的激发密度阈值低于CH 3 NH 3铅3没有PEO。在还原φ，模式号码和基于腔量子电动力学（cQED）激光阈值注量减小，和时间分辨光致发光（PL）衰减曲线显示，较快的寿命分量由赛尔效果增强。这些发现表明，在完全填充微腔的CH 3 NH 3 PbBr 3 / PEO复合材料中发生了强光限制。
更新日期：2020-01-24
中文翻译：
在微毛细管中生长的CH 3 NH 3 PbBr 3 / PEO复合材料的耳语画廊模式激光发射
甲基铵溴化铅（CH 3 NH 3 PbBr 3）/聚环氧乙烷（PEO）复合材料是通过简单的微毛细管方法制备的。将PEO添加到CH 3 NH 3 PbBr 3的前体溶液中可改善微毛细管内部生长的钙钛矿晶体的形貌。在光泵浦下，根据微毛细管的内径（ϕ），在带有PEO的CH 3 NH 3 PbBr 3中观察到耳语画廊模式（WGM）激光，并且该激光的激发密度阈值低于CH 3 NH 3铅3没有PEO。在还原φ，模式号码和基于腔量子电动力学（cQED）激光阈值注量减小，和时间分辨光致发光（PL）衰减曲线显示，较快的寿命分量由赛尔效果增强。这些发现表明，在完全填充微腔的CH 3 NH 3 PbBr 3 / PEO复合材料中发生了强光限制。
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