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Broad-band lead halide perovskite quantum dot single-mode lasers
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-08-28 , DOI: 10.1039/d0tc02551h Chun Zhou 1, 2, 3, 4, 5 , Jie Yu 1, 2, 3, 4, 5 , Hongxing Dong 1, 2, 3, 4, 6 , Fanglong Yuan 7, 8, 9 , Xiaopeng Zheng 10, 11, 12 , Mingming Jiang 4, 13, 14, 15 , Long Zhang 1, 2, 3, 4, 6
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-08-28 , DOI: 10.1039/d0tc02551h Chun Zhou 1, 2, 3, 4, 5 , Jie Yu 1, 2, 3, 4, 5 , Hongxing Dong 1, 2, 3, 4, 6 , Fanglong Yuan 7, 8, 9 , Xiaopeng Zheng 10, 11, 12 , Mingming Jiang 4, 13, 14, 15 , Long Zhang 1, 2, 3, 4, 6
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Perovskite colloidal quantum dots (CQDs) enable a solution-processed approach toward lasers, simultaneously providing tunable wavelength, high quantum efficiency, large absorption cross-section, and long Auger lifetimes. However, broad-band single-mode lasers based on such CQDs have been proven to be challenging. Here we report broad-band single-mode lasers from solution-processed CsPbX3 (X = Cl, Br, I) CQDs based on a high-quality zinc oxide microrod hexagonal whispering-gallery microcavity. A typical single-mode laser with ultra-narrow linewidth (∼0.21 nm, quality factor ∼3000) at 11.7 μJ cm−2 was obtained at 636 nm based on the conformal deposition of CsPb(Br0.5I0.5)3 CQDs on an individual hexagonal zinc oxide microrod cavity with a radius of about ∼776 nm. Moreover, by tuning the halogen ratio, synthesis temperature and the size of the zinc oxide microrods, broad-band tunable single-mode lasers are obtained across the entire visible spectrum from 417 nm to 723 nm. These results represent a significant step towards easy solution-processed broad-band tunable single-mode lasers.
中文翻译：
宽带卤化铅钙钛矿量子点单模激光器
钙钛矿胶体量子点（CQD）使解决方案可用于激光，同时提供可调谐波长，高量子效率，大吸收截面和长俄歇寿命。然而，事实证明，基于这种CQD的宽带单模激光器具有挑战性。在这里，我们报告基于高质量氧化锌微棒六角形耳语画廊微腔的固溶处理CsPbX 3（X = Cl，Br，I）CQD产生的宽带单模激光器。基于CsPb（Br 0.5 I 0.5）3的保形沉积，获得了典型的单模激光，其线宽（〜0.21 nm，品质因数〜3000）在11.7μJcm -2时在636 nm处获得。在单个六角形氧化锌微棒腔上的CQD，半径约为776 nm。此外，通过调节卤素比率，合成温度和氧化锌微棒的尺寸，可以在417 nm至723 nm的整个可见光谱范围内获得宽带可调谐单模激光器。这些结果代表了易于解决方案处理的宽带可调谐单模激光器的重要一步。
更新日期：2020-10-16
中文翻译：
宽带卤化铅钙钛矿量子点单模激光器
钙钛矿胶体量子点（CQD）使解决方案可用于激光，同时提供可调谐波长，高量子效率，大吸收截面和长俄歇寿命。然而，事实证明，基于这种CQD的宽带单模激光器具有挑战性。在这里，我们报告基于高质量氧化锌微棒六角形耳语画廊微腔的固溶处理CsPbX 3（X = Cl，Br，I）CQD产生的宽带单模激光器。基于CsPb（Br 0.5 I 0.5）3的保形沉积，获得了典型的单模激光，其线宽（〜0.21 nm，品质因数〜3000）在11.7μJcm -2时在636 nm处获得。在单个六角形氧化锌微棒腔上的CQD，半径约为776 nm。此外，通过调节卤素比率，合成温度和氧化锌微棒的尺寸，可以在417 nm至723 nm的整个可见光谱范围内获得宽带可调谐单模激光器。这些结果代表了易于解决方案处理的宽带可调谐单模激光器的重要一步。
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