Band alignment determination of ZnO/PbSe heterostructure interfaces by synchrotron radiation photoelectron spectroscopy

被引：12
作者：
Cai, C. F. [1 ]
Zhang, B. P. [1 ]
Li, R. F. [1 ]
Wu, H. Z. [1 ]
Xu, T. N. [1 ]
Zhang, W. H. [2 ]
Zhu, J. F. [2 ]
机构：
[1] Zhejiang Univ, Dept Phys, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China
来源：
EPL | 2012年 / 99卷 / 03期
关键词：
PBSE SEMICONDUCTOR NANOCRYSTALS; RAY PHOTOEMISSION SPECTRA; CARRIER-MULTIPLICATION; EFFICIENCY;
D O I：
10.1209/0295-5075/99/37010
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Band offsets at ZnO/PbSe heterostructure interfaces are determined by synchrotron radiation photoelectron spectroscopy. A type-I band alignment with the valence band offset (VBO) Delta E-V = 0.73 eV and conduction band offset (CBO) Delta E-C = 2.36 eV is concluded for ZnO/PbSe film heterojunctions. The approach is extended to ZnO/PbSe nanocrystal (NC) heterojunctions, which reveals that band alignment can be adjusted via varying the dot size and a type-II alignment is formed when the dot size is <= 5 nm. The small conduction band offset of the ZnO/PbSe film heterojunction and the tunable band alignment of the ZnO/PbSe NCs heterojunction with different crystal sizes shall benefit the design and fabrication of improved optoelectronic devices. Copyright (C) EPLA, 2012
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页数：5
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  • [1] Synthesis of PbS/TiO2 Colloidal Heterostructures for Photovoltaic Applications
    Acharya, Krishna P.
    Hewa-Kasakarage, Nishshanka N.
    Alabi, Taiwo R.
    Nemitz, Ian
    Khon, Elena
    Ullrich, Bruno
    Anzenbacher, Pavel
    Zamkov, Mikhail
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (29) : 12496 - 12504
  • [2] Low-Temperature Annealing for Highly Conductive Lead Chalcogenide Quantum Dot Solids
    Baik, Seung Jae
    Kim, Kyungnam
    Lim, Koeng Su
    Jung, SoMyung
    Park, Yun-Chang
    Han, Dong Geon
    Lim, Sooyeon
    Yoo, Seunghyup
    Jeong, Sohee
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (03) : 607 - 612
  • [3] Comparing Multiple Exciton Generation in Quantum Dots To Impact Ionization in Bulk Semiconductors: Implications for Enhancement of Solar Energy Conversion
    Beard, Matthew C.
    Midgett, Aaron G.
    Hanna, Mark C.
    Luther, Joseph M.
    Hughes, Barbara K.
    Nozik, Arthur J.
    [J]. NANO LETTERS, 2010, 10 (08) : 3019 - 3027
  • [4] Gallium-doped zinc oxide films as transparent electrodes for organic solar cell applications
    Bhosle, V.
    Prater, J. T.
    Yang, Fan
    Burk, D.
    Forrest, S. R.
    Narayan, J.
    [J]. JOURNAL OF APPLIED PHYSICS, 2007, 102 (02)
  • [5] Experimental determination of valence band offset at PbTe/Ge(100) interface by synchrotron radiation photoelectron spectroscopy
    Cai, C. F.
    Wu, H. Z.
    Si, J. X.
    Zhang, W. H.
    Xu, Y.
    Zhu, J. F.
    [J]. APPLIED SURFACE SCIENCE, 2010, 256 (20) : 6057 - 6059
  • [6] Band offsets of HfO2/ZnO interface: In situ x-ray photoelectron spectroscopy measurement and ab initio calculation
    Chen, Q.
    Yang, M.
    Feng, Y. P.
    Chai, J. W.
    Zhang, Z.
    Pan, J. S.
    Wang, S. J.
    [J]. APPLIED PHYSICS LETTERS, 2009, 95 (16)
  • [7] PbSe Nanocrystal Excitonic Solar Cells
    Choi, Joshua J.
    Lim, Yee-Fun
    Santiago-Berrios, Mitk'El B.
    Oh, Matthew
    Hyun, Byung-Ryool
    Sung, Liangfeng
    Bartnik, Adam C.
    Goedhart, Augusta
    Malliaras, George G.
    Abruna, Hector D.
    Wise, Frank W.
    Hanrath, Tobias
    [J]. NANO LETTERS, 2009, 9 (11) : 3749 - 3755
  • [8] Size-Dependent Composition and Molar Extinction Coefficient of PbSe Semiconductor Nanocrystals
    Dai, Quanqin
    Wang, Yingnan
    Li, Xinbi
    Zhang, Yu
    Pellegrino, Donald J.
    Zhao, Muxun
    Zou, Bo
    Seo, JaeTae
    Wang, Yiding
    Yu, William W.
    [J]. ACS NANO, 2009, 3 (06) : 1518 - 1524
  • [9] The Different Nature of Band Edge Absorption and Emission in Colloidal PbSe/CdSe Core/Shell Quantum Dots
    De Geyter, Bram
    Justo, Yolanda
    Moreels, Iwan
    Lambert, Karel
    Smet, Philippe F.
    Van Thourhout, Dries
    Houtepen, Arjan J.
    Grodzinska, Dominika
    Donega, Celso de Mello
    Meijerink, Andries
    Vanmaekelbergh, Daniel
    Hens, Zeger
    [J]. ACS NANO, 2011, 5 (01) : 58 - 66
  • [10] Size-Dependent Valence and Conduction Band-Edge Energies of Semiconductor Nanocrystals
    Jasieniak, Jacek
    Califano, Marco
    Watkins, Scott E.
    [J]. ACS NANO, 2011, 5 (07) : 5888 - 5902
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