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Two-dimensional beta-lead oxide quantum dots†
Nanoscale ( IF 5.8 ) Pub Date : 2018-11-02 00:00:00 , DOI: 10.1039/c8nr07788f Weichun Huang 1, 2, 3, 4, 5 , Xiantao Jiang 4, 5, 6, 7 , Yunzheng Wang 1, 2, 3, 4, 5 , Feng Zhang 1, 2, 3, 4, 5 , Yanqi Ge 1, 2, 3, 4, 5 , Ye Zhang 1, 2, 3, 4, 5 , Leiming Wu 8, 9, 10, 11 , Dingtao Ma 8, 9, 10, 11 , Zhongjun Li 8, 9, 10, 11 , Rui Wang 7, 12, 13, 14 , Ziyin N. Huang 15, 16, 17, 18 , Xiaoyu Dai 1, 2, 3, 4, 5 , Yuanjiang Xiang 1, 2, 3, 4, 5 , Jianqing Li 8, 9, 10, 11 , Han Zhang 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-11-02 00:00:00 , DOI: 10.1039/c8nr07788f Weichun Huang 1, 2, 3, 4, 5 , Xiantao Jiang 4, 5, 6, 7 , Yunzheng Wang 1, 2, 3, 4, 5 , Feng Zhang 1, 2, 3, 4, 5 , Yanqi Ge 1, 2, 3, 4, 5 , Ye Zhang 1, 2, 3, 4, 5 , Leiming Wu 8, 9, 10, 11 , Dingtao Ma 8, 9, 10, 11 , Zhongjun Li 8, 9, 10, 11 , Rui Wang 7, 12, 13, 14 , Ziyin N. Huang 15, 16, 17, 18 , Xiaoyu Dai 1, 2, 3, 4, 5 , Yuanjiang Xiang 1, 2, 3, 4, 5 , Jianqing Li 8, 9, 10, 11 , Han Zhang 1, 2, 3, 4, 5
Affiliation
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In recent years, black-phosphorus-analogue (BPA) two-dimensional (2D) materials have been explored to demonstrate promising optoelectronic performances and distinguished ambient stabilities, holding great promise in practical applications. Here, one new kind of BPA material, orthorhombic β-PbO quantum dots (QDs), is successfully fabricated by a facile liquid phase exfoliation (LPE) technique. The as-prepared β-PbO QDs show a homogeneous distribution of the lateral size (3.2 ± 0.9 nm) and thickness (2.5 ± 0.5 nm), corresponding to 4 ± 1 layers. The carrier dynamics of β-PbO QDs was systematically investigated via a femtosecond resolution transient absorption approach in the visible wavelength regime and it was clarified that two decay components were resolved with a decay time of τ1 = 2.3 ± 0.3 ps and τ2 = 87.9 ± 6.0 ps, respectively, providing important insights into their potential applications in the field of ultrafast optics, nanomechanics and optoelectronics. As a proof-of-concept, β-PbO QDs were, for the first time to our knowledge, fabricated as a working electrode in a photoelectrochemical (PEC)-typed photodetector that exhibits significantly high photocurrent density and excellent stability under ambient conditions.
中文翻译：
二维β-氧化铅量子点†
近年来，人们已经探索了黑磷类似物（BPA）二维（2D）材料，以展示有前途的光电性能和出色的环境稳定性，在实际应用中具有广阔的前景。在这里，一种新型的BPA材料，正交的β-PbO量子点（QDs），是通过一种简便的液相剥落（LPE）技术成功制造的。所制备的β-PbO量子点显示出横向尺寸（3.2±0.9 nm）和厚度（2.5±0.5 nm）的均匀分布，对应于4±1层。β-PBO QD的载流子动力学了系统的研究通过在可见波长范围的飞秒分辨率瞬态吸收方法和可明确的是2个衰变组分用的衰变时间分辨τ 1= 2.3±0.3 PS和τ 2 = 87.9±6.0 PS，分别提供了重要的见解它们在超快光学，纳米力学和光电子学领域的应用潜力。作为概念验证，据我们所知，β-PbOQD首次被制造为光电化学（PEC）型光电探测器中的工作电极，该光电探测器在环境条件下表现出很高的光电流密度和出色的稳定性。
更新日期：2018-11-02
中文翻译：
二维β-氧化铅量子点†
近年来，人们已经探索了黑磷类似物（BPA）二维（2D）材料，以展示有前途的光电性能和出色的环境稳定性，在实际应用中具有广阔的前景。在这里，一种新型的BPA材料，正交的β-PbO量子点（QDs），是通过一种简便的液相剥落（LPE）技术成功制造的。所制备的β-PbO量子点显示出横向尺寸（3.2±0.9 nm）和厚度（2.5±0.5 nm）的均匀分布，对应于4±1层。β-PBO QD的载流子动力学了系统的研究通过在可见波长范围的飞秒分辨率瞬态吸收方法和可明确的是2个衰变组分用的衰变时间分辨τ 1= 2.3±0.3 PS和τ 2 = 87.9±6.0 PS，分别提供了重要的见解它们在超快光学，纳米力学和光电子学领域的应用潜力。作为概念验证，据我们所知，β-PbOQD首次被制造为光电化学（PEC）型光电探测器中的工作电极，该光电探测器在环境条件下表现出很高的光电流密度和出色的稳定性。
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