Valence Band Offset at MoO3/CdTe Interface Probed by X-ray Photoelectron Spectroscopy

被引：0
作者：
Paudel, N. R. [1 ]
Yan, Y.
机构：
[1] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA
来源：
2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC) | 2014年
关键词：
CdTe; VBO; MoO3; Cu-free; back contact; solar cells; XPS; TELLURIDE;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
CdTe-based thin-film solar cells fabricated with Cufree MoO3/Au back contacts have achieved cell efficiencies as high as 14%. The incorporation of MoO3 buffer layers improves the open circuit voltage but reduces the fill factor (FF) of the CdTe cells compared to the cells using Au-only contacts. X-ray photoelectron spectroscopy measurements suggest a 2.75+/-0.20 eV valence band offset (VBO) between CdTe and MoO3. Such a large VBO explains the decrease in FF with the increase of the thickness of the MoO3 buffer layer.
引用
收藏
页码：2397 / 2399
页数：3
相关论文
共 8 条
  • [1] Study of oxidized cadmium zinc telluride surfaces
    Chen, KT
    Shi, DT
    Chen, H
    Granderson, B
    George, MA
    Collins, WE
    Burger, A
    James, RB
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1997, 15 (03): : 850 - 853
  • [2] de Berne J.C., 2012, PHYS STATUS SOLIDI, V209, P1291
  • [3] Kranz L., 2013, 39 IEEE PHOT SPEC C
  • [4] CdS/CdTe solar cells with MoOx as back contact buffers
    Lin, Hao
    Xia, Wei
    Wu, Hsiang N.
    Tang, Ching W.
    [J]. APPLIED PHYSICS LETTERS, 2010, 97 (12)
  • [5] Sputtered CdS/CdTe solar cells with MoO3-x/Au back contacts
    Paudel, N. R.
    Compaan, A. D.
    Yan, Y.
    [J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2013, 113 : 26 - 30
  • [6] CdS/CdTe thin-film solar cells with Cu-free transition metal oxide/Au back contacts
    Paudel, Naba Raj
    Xiao, Chuanxiao
    Yan, Yanfa
    [J]. PROGRESS IN PHOTOVOLTAICS, 2015, 23 (04): : 437 - 442
  • [7] Simchi Hamed., 2013, MRS Proceedings, V1538, P173, DOI DOI 10.1557/0PL.2013.1018
  • [8] KINETICS AND OXIDE COMPOSITION FOR THERMAL-OXIDATION OF CADMIUM TELLURIDE
    WANG, F
    SCHWARTZMAN, A
    FAHRENBRUCH, AL
    SINCLAIR, R
    BUBE, RH
    STAHLE, CM
    [J]. JOURNAL OF APPLIED PHYSICS, 1987, 62 (04) : 1469 - 1476
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