Measurement and assignment of the size-dependent optical spectrum in CdSe quantum dots

被引:1020
作者
Norris, DJ [1 ]
Bawendi, MG [1 ]
机构
[1] MIT,CAMBRIDGE,MA 02139
来源
PHYSICAL REVIEW B | 1996年 / 53卷 / 24期
关键词
D O I
10.1103/PhysRevB.53.16338
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We use photoluminescence excitation to study the electronic spectrum of CdSe quantum dots ranging from similar to 12 to similar to 53 Angstrom in radius. We follow the size evolution of ten quantum dot absorption features. Comparison of the spectra with theoretical predictions allows us to confidently assign six of these transitions. We discuss the most likely assignments for the remaining four. We And that the n(h)S(3/2)1S(e) and n(h)S(1/2)1S(e) transitions dominate the spectra, accounting for half of the observed features. Our size-dependent data exhibit two strong avoided crossings, demonstrating the importance of valence-band structure in the description of the excited states.
引用
收藏
页码:16338 / 16346
页数:9
相关论文
共 53 条
  • [1] ELECTRONIC STATES OF SEMICONDUCTOR CLUSTERS - HOMOGENEOUS AND INHOMOGENEOUS BROADENING OF THE OPTICAL-SPECTRUM
    ALIVISATOS, AP
    HARRIS, AL
    LEVINOS, NJ
    STEIGERWALD, ML
    BRUS, LE
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1988, 89 (07) : 4001 - 4011
  • [2] [Anonymous], 1972, SEMICONDUCTORS SEMIM
  • [3] SPHERICAL MODEL OF SHALLOW ACCEPTOR STATES IN SEMICONDUCTORS
    BALDERESCHI, A
    LIPARI, NO
    [J]. PHYSICAL REVIEW B, 1973, 8 (06) : 2697 - 2709
  • [4] ELECTRONIC-STRUCTURE AND PHOTOEXCITED-CARRIER DYNAMICS IN NANOMETER-SIZE CDSE CLUSTERS
    BAWENDI, MG
    WILSON, WL
    ROTHBERG, L
    CARROLL, PJ
    JEDJU, TM
    STEIGERWALD, ML
    BRUS, LE
    [J]. PHYSICAL REVIEW LETTERS, 1990, 65 (13) : 1623 - 1626
  • [5] INVESTIGATION OF THE SURFACE-MORPHOLOGY OF CAPPED CDSE NANOCRYSTALLITES BY P-31 NUCLEAR-MAGNETIC-RESONANCE
    BECERRA, LR
    MURRAY, CB
    GRIFFIN, RG
    BAWENDI, MG
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (04) : 3297 - 3300
  • [7] SPECTROSCOPIC IDENTIFICATION OF THE LUMINESCENCE MECHANISM OF HIGHLY POROUS SILICON
    CALCOTT, PDJ
    NASH, KJ
    CANHAM, LT
    KANE, MJ
    BRUMHEAD, D
    [J]. JOURNAL OF LUMINESCENCE, 1993, 57 (1-6) : 257 - 269
  • [8] CHAMARRO M, 1995, JPN J APPL PHYS S, V34, P12
  • [9] HIGHER EXCITED ELECTRONIC STATES IN CLUSTERS OF ZNSE, CDSE, AND ZNS - SPIN-ORBIT, VIBRONIC, AND RELAXATION PHENOMENA
    CHESTNOY, N
    HULL, R
    BRUS, LE
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (04) : 2237 - 2242
  • [10] PROBING OF THE QUANTUM-DOT SIZE DISTRIBUTION IN CDTE-DOPED GLASSES BY PHOTOLUMINESCENCE EXCITATION SPECTROSCOPY
    DEOLIVEIRA, CRM
    DEPAULA, AM
    PLENTZ, FO
    NETO, JAM
    BARBOSA, LC
    ALVES, OL
    MENEZES, EA
    RIOS, JMM
    FRAGNITO, HL
    CRUZ, CHB
    CESAR, CL
    [J]. APPLIED PHYSICS LETTERS, 1995, 66 (04) : 439 - 441