Charged Quantum Dots for High-Efficiency Photovoltaics and IR Sensing
Charged Quantum Dots for High-Efficiency Photovoltaics and IR Sensing
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DOI：
10.1002/9781118678107.ch18
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发表时间：
2013-06
期刊：
影响因子：
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通讯作者：
S. Luryi;Jimmy Xu;A. Zaslavsky
中科院分区：
文献类型：
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作者：
S. Luryi;Jimmy Xu;A. Zaslavsky
量子点 (QD) 的充电提供了一种管理 3D 纳米级电位分布的有效方法，从而控制光电子过程。如果量子点形成特定的结构或阵列，点充电会在随机分布的单个点周围产生局部势垒，并在点簇、行等周围产生集体势垒。纳米级势垒为抑制量子点光载流子的快速捕获过程提供了有效的工具。这使得人们能够增加光载流子寿命并减少复合损失。点的充电还增强了电子与红外辐射的耦合和亚带隙光子的多步吸收。带电量子点的纳米材料具有许多对光伏和传感应用有吸引力的特性。纳米颗粒；光伏效应；量子点
Charging of quantum dots (QDs) provides an effective way for managing 3D nanoscale potential profiles, which in turn control photoelectron processes. Dot charging creates local potential barriers around randomly distributed single dots, and collective barriers around dot clusters, rows etc. if the QDs form specific structures or arrays. The nanoscale potential barriers provide an effective tool for the suppression of fast capture processes of photocarriers by QDs. This allows one to increase the photocarrier lifetime and reduce recombination losses. The charging of dots also enhances the electron coupling to infrared radiation and multi‐step absorption of sub‐bandgap photons. Nanomaterials with charged QDs have a number of features attractive for photovoltaic and sensing applications.Controlled Vocabulary Termsinfrared sources; nanoparticles; photovoltaic effects; quantum dots