XANES: observation of quantum confinement in the conduction band of colloidal PbS quantum dots

被引：6
|
作者：
Demchenko, I. N. [1 ]
Chernyshova, M.
He, X.
Minikayev, R. [1 ]
Syryanyy, Y. [1 ]
Derkachova, A. [1 ]
Derkachov, G. [1 ]
Stolte, W. C.
Piskorska-Hommel, E.
Reszka, A. [1 ]
Liang, H.
机构：
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
来源：
15TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS15) | 2013年 / 430卷
关键词：
SELF-ABSORPTION; EDGE;
D O I：
10.1088/1742-6596/430/1/012030
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The presented investigations aimed at development of inexpensive method for synthesized materials suitable for utilization of solar energy. This important issue was addressed by focusing, mainly, on electronic local structure studies with supporting x-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis of colloidal galena nano-particles (NPs) and quantum dots (QDs) synthesized using wet chemistry under microwave irradiation. Performed x-ray absorption near edge structure (XANES) analysis revealed an evidence of quantum confinement for the sample with QDs, where the bottom of the conduction band was shifted to higher energy. The QDs were found to be passivated with oxides at the surface. Existence of sulfate/sulfite and thiosulfate species in pure PbS and QDs, respectively, was identified.
引用
收藏
页数：5
相关论文
共 50 条
  • [31] Quantum confinement in graphene quantum dots
    Huang, Zhongkai
    Qu, Jinfeng
    Peng, Xiangyang
    Liu, Wenliang
    Zhang, Kaiwang
    Wei, Xiaolin
    Zhong, Jianxin
    PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS, 2014, 8 (05): : 436 - 440
  • [32] Colloidal Quantum Dots: 6. Nanoclusters of Colloidal Quantum Dots
    Razumov, V. F.
    Brichkin, S. B.
    Tovstun, S. A.
    HIGH ENERGY CHEMISTRY, 2024, 58 (SUPPL 1) : S81 - S104
  • [33] Direct observation of the structure of band-edge biexcitons in colloidal semiconductor CdSe quantum dots
    Sewall, Samuel L.
    Franceschetti, Alberto
    Cooney, Ryan R.
    Zunger, Alex
    Kambhampati, Patanjali
    PHYSICAL REVIEW B, 2009, 80 (08)
  • [34] Quantum confinement effects on charge-transfer between PbS quantum dots and 4-mercaptopyridine
    Fu, Xiaoqi
    Pan, Yi
    Wang, Xin
    Lombardi, John R.
    JOURNAL OF CHEMICAL PHYSICS, 2011, 134 (02):
  • [35] Evidence of band filling in PbS colloidal quantum dot square superstructures
    Liu, Liming
    Septianto, Ricky Dwi
    Bisri, Satria Zulkarnaen
    Ishida, Yasuhiro
    Aida, Takuzo
    Iwasa, Yoshihiro
    NANOSCALE, 2021, 13 (33) : 14001 - 14007
  • [36] Colloidal quantum dots
    Guyot-Sionnest, Philippe
    COMPTES RENDUS PHYSIQUE, 2008, 9 (08) : 777 - 787
  • [37] Effects of quantum confinement and shape on band gap of core/shell quantum dots and nanowires
    Gao, Faming
    APPLIED PHYSICS LETTERS, 2011, 98 (19)
  • [38] Colloidal Quantum Dots: 5. Luminescence Features of Colloidal Quantum Dots
    Brichkin, S. B.
    Spirin, M. G.
    Tovstun, S. A.
    Razumov, V. F.
    HIGH ENERGY CHEMISTRY, 2024, 58 (SUPPL 1) : S54 - S80
  • [39] Photo luminescence properties related to localized states in colloidal PbS quantum dots
    Kim, DG
    Kuwabara, T
    Nakayama, M
    JOURNAL OF LUMINESCENCE, 2006, 119 : 214 - 218
  • [40] Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots
    Ellingson, RJ
    Beard, MC
    Johnson, JC
    Yu, PR
    Micic, OI
    Nozik, AJ
    Shabaev, A
    Efros, AL
    NANO LETTERS, 2005, 5 (05) : 865 - 871
12345