| 神经网络法研究多溴代二苯胺热力学性质 |
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| 引用本文： | 堵锡华,庄文昌,史小琴,冯长君.神经网络法研究多溴代二苯胺热力学性质[J].化学物理学报,2015,28(1):59-64. |
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| 作者姓名： | 堵锡华 庄文昌 史小琴 冯长君 |
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| 作者单位： | 天津工业大学应用物理系，天津 300387,吉林大学物理学院，长春 130012,吉林大学电子科学与工程学院，集成光电子学国家重点实验室，长春 130012 |
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| 摘 要： | 通过时间分辨光谱技术详细地研究了ZnCuInS/ZnSe/ZnS量子点的激子弛豫动力学. 基于速率分布模型，波长依赖的发射动力学表明本征激子、界面缺陷态中的激子、给-受体对态中的激子都会参与量子点的发光过程，整个发光过程主要依赖于给-受体对态发射. 瞬态吸收数据表明激发后本征激子和界面缺陷物种可能会同时出现，在高激发光强下，光强依赖的俄歇复合过程也存在于量子点中
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| 关 键 词： | 量子点，时间分辨光谱，激子弛豫动力学 |
| 收稿时间： | 9/8/2014 12:00:00 AM |
Investigation on Exciton Relaxation Kinetics of ZnCuInS/ZnSe/ZnS Quantum Dots by Time-Resolved Spectroscopy Techniques |
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| Xi-hua Du,Wen-chang Zhuang,Xiao-qin Shi and Chang-jun Feng.Investigation on Exciton Relaxation Kinetics of ZnCuInS/ZnSe/ZnS Quantum Dots by Time-Resolved Spectroscopy Techniques[J].Chinese Journal of Chemical Physics,2015,28(1):59-64. |
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| Authors: | Xi-hua Du Wen-chang Zhuang Xiao-qin Shi and Chang-jun Feng |
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| Institution: | Department of Physics, Tianjin Polytechnic University, Tianjin 300387, China,College of Physics, Jilin University, Changchun 130012, China and State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China |
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| Abstract: | The exciton relaxation kinetics of ZnCuInS/ZnSe/ZnS quantum dots (QDs) is investigated by time-resolved spectroscopy techniques in detail. Based on the rate distribution model, the wavelength-dependent emission dynamics shows that the intrinsic exciton, the exciton in the interface defect state and that in donor-acceptor pair state (DAPS) together participate in the photoluminescence process of QDs, and the whole emission process is mainly dependent on the DAPS emission. Transient absorption data show that the intrinsic exciton and the interface defect species maybe together appear after excitation and the intensity-dependent
Auger recombination process also exists in QDs at high excitation intensity. |
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| Keywords: | Quantum dots Time-resolved spectroscopy Exciton relaxation kinetics |
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