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Ultrafast Charge Transfer in Perovskite Nanowire/2D Transition Metal Dichalcogenide Heterostructures
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-03-13 00:00:00 , DOI: 10.1021/acs.jpclett.8b00260 Qiyi Fang 1, 2 , Qiuyu Shang 1, 3 , Liyun Zhao 1 , Rui Wang 4 , Zhepeng Zhang 1, 2 , Pengfei Yang 1, 2 , Xinyu Sui 4 , Xiaohui Qiu 4 , Xinfeng Liu 4 , Qing Zhang 1, 3 , Yanfeng Zhang 1, 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-03-13 00:00:00 , DOI: 10.1021/acs.jpclett.8b00260 Qiyi Fang 1, 2 , Qiuyu Shang 1, 3 , Liyun Zhao 1 , Rui Wang 4 , Zhepeng Zhang 1, 2 , Pengfei Yang 1, 2 , Xinyu Sui 4 , Xiaohui Qiu 4 , Xinfeng Liu 4 , Qing Zhang 1, 3 , Yanfeng Zhang 1, 2
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Mixed-dimensional van der Waals (vdW) heterostructures between one-dimensional (1D) perovskite nanowires and two-dimensional (2D) transition metal dichalcogenides (TMDCs) hold great potential for novel optoelectronics and light-harvesting applications. However, the ultrafast carrier dynamics between the 1D perovskite nanowires and 2D TMDCs are currently not well understood, which is critical for related optoelectronic applications. Here we demonstrate vdW heterostructures of CsPbBr3 nanowire/monolayer MoS2 and CsPbBr3 nanowire/monolayer WSe2 and further present systematic investigations on their charge transfer dynamics. We show that CsPbBr3/MoS2 and CsPbBr3/WSe2 are type-I and type-II heterostructures, respectively. Both electrons and holes transfer from CsPbBr3 to MoS2 with an efficiency of 71%. As a contrast, holes transfer from CsPbBr3 to WSe2 with a carrier transfer efficiency of 70% and electrons transfer inversely within 7 ps. The ultrafast and efficient charge transfer in the 1D/2D perovskite–TMDC heterostructures suggest great promise in light emission, photodetector, and photovoltaic devices.
中文翻译：
钙钛矿纳米线/ 2D过渡金属双硫属化物异质结构中的超快电荷转移。
一维（1D）钙钛矿纳米线与二维（2D）过渡金属二卤化金属（TMDC）之间的混合尺寸范德华（vdW）异质结构在新型光电技术和光收集应用中具有巨大潜力。但是，目前尚不十分了解1D钙钛矿纳米线和2D TMDC之间的超快载流子动力学，这对于相关的光电应用至关重要。在这里，我们演示CsPbBr 3纳米线/单层MoS 2和CsPbBr 3纳米线/单层WSe 2的vdW异质结构，并进一步介绍其电荷转移动力学的系统研究。我们表明CsPbBr 3 / MoS 2和CsPbBr 3/ WSe 2分别是I型和II型异质结构。电子和空穴都以71％的效率从CsPbBr 3转移到MoS 2。相反，空穴从CsPbBr 3转移到WSe 2，载流子转移效率为70％，电子在7 ps内反向转移。1D / 2D钙钛矿–TMDC异质结构中超快和高效的电荷转移表明在发光，光电检测器和光伏器件中具有广阔的前景。
更新日期：2018-03-13
中文翻译：
钙钛矿纳米线/ 2D过渡金属双硫属化物异质结构中的超快电荷转移。
一维（1D）钙钛矿纳米线与二维（2D）过渡金属二卤化金属（TMDC）之间的混合尺寸范德华（vdW）异质结构在新型光电技术和光收集应用中具有巨大潜力。但是，目前尚不十分了解1D钙钛矿纳米线和2D TMDC之间的超快载流子动力学，这对于相关的光电应用至关重要。在这里，我们演示CsPbBr 3纳米线/单层MoS 2和CsPbBr 3纳米线/单层WSe 2的vdW异质结构，并进一步介绍其电荷转移动力学的系统研究。我们表明CsPbBr 3 / MoS 2和CsPbBr 3/ WSe 2分别是I型和II型异质结构。电子和空穴都以71％的效率从CsPbBr 3转移到MoS 2。相反，空穴从CsPbBr 3转移到WSe 2，载流子转移效率为70％，电子在7 ps内反向转移。1D / 2D钙钛矿–TMDC异质结构中超快和高效的电荷转移表明在发光，光电检测器和光伏器件中具有广阔的前景。
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