Band gap engineering based on MgxZn1-xO and CdyZn1-yO ternary alloy films

被引:624
作者
Makino, T [1 ]
Segawa, Y
Kawasaki, M
Ohtomo, A
Shiroki, R
Tamura, K
Yasuda, T
Koinuma, H
机构
[1] RIKEN, Inst Phys & Chem Res, Photodynam Res Ctr, Sendai, Miyagi 9800845, Japan
[2] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Yokohama, Kanagawa 2268502, Japan
[3] Ishinomaki Senshu Univ, Sch Sci & Engn, Ishinomaki 9868580, Japan
[4] Tokyo Inst Technol, Sch Sci & Engn, Yokohama, Kanagawa 2268503, Japan
关键词
D O I
10.1063/1.1350632
中图分类号
O59 [应用物理学];
学科分类号
摘要
We describe the structural and optical properties of II-VI oxide alloys, MgxZn1-xO and CdyZn1-yO, grown by pulsed-laser deposition. Single-phase alloyed films of (Mg,Zn)O and (Cd,Zn)O with c-axis orientations were epitaxially grown on sapphire (0001) substrates. The maximum magnesium and cadmium concentrations (x = 0.33 and y = 0.07, respectively) were significantly larger than the thermodynamic solubility limits. The band gap energies systematically changed from 3.0 (y = 0.07) to 4.0 eV (x = 0.33) at room temperature. The photoluminescence peak energy deduced at 4.2 K could be tuned from 3.19 to 3.87 eV by using Cd0.07Zn0.93O and Mg0.33Zn0.67O at both ends, respectively. The lattice constants of the a axis were monotonically increasing functions of the concentrations of both alloys. The exciton-phonon coupling strength was determined in Cd0.01Zn0.99O grown on a lattice-matched ScAlMgO4 substrate. (C) 2001 American Institute of Physics.
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页码:1237 / 1239
页数:3
相关论文
共 15 条
  • [1] Optically pumped lasing of ZnO at room temperature
    Bagnall, DM
    Chen, YF
    Zhu, Z
    Yao, T
    Koyama, S
    Shen, MY
    Goto, T
    [J]. APPLIED PHYSICS LETTERS, 1997, 70 (17) : 2230 - 2232
  • [2] INTERBAND MAGNETOREFLECTION OF ZNO
    HUMMER, K
    [J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 1973, 56 (01): : 249 - 260
  • [3] Kawasaki M., 1998, 1998 INT C SOL STAT, P356
  • [4] INTERBAND CRITICAL-POINTS OF GAAS AND THEIR TEMPERATURE-DEPENDENCE
    LAUTENSCHLAGER, P
    GARRIGA, M
    LOGOTHETIDIS, S
    CARDONA, M
    [J]. PHYSICAL REVIEW B, 1987, 35 (17): : 9174 - 9189
  • [5] TRANSMISSION SPECTRA OF ZNO SINGLE CRYSTALS
    LIANG, WY
    YOFFE, AD
    [J]. PHYSICAL REVIEW LETTERS, 1968, 20 (02) : 59 - +
  • [6] Radiative and nonradiative recombination processes in lattice-matched (Cd,Zn)O/(Mg,Zn)O multiquantum wells
    Makino, T
    Chia, CH
    Tuan, NT
    Segawa, Y
    Kawasaki, M
    Ohtomo, A
    Tamura, K
    Koinuma, H
    [J]. APPLIED PHYSICS LETTERS, 2000, 77 (11) : 1632 - 1634
  • [7] Exciton spectra of ZnO epitaxial layers on lattice-matched substrates grown with laser-molecular-beam epitaxy
    Makino, T
    Chia, CH
    Tuan, NT
    Segawa, Y
    Kawasaki, M
    Ohtomo, A
    Tamura, K
    Koinuma, H
    [J]. APPLIED PHYSICS LETTERS, 2000, 76 (24) : 3549 - 3551
  • [8] Room-temperature stimulated emission of excitons in ZnO/(Mg, Zn)O superlattices
    Ohtomo, A
    Tamura, K
    Kawasaki, M
    Makino, T
    Segawa, Y
    Tang, ZK
    Wong, GKL
    Matsumoto, Y
    Koinuma, H
    [J]. APPLIED PHYSICS LETTERS, 2000, 77 (14) : 2204 - 2206
  • [9] Thermal stability of supersaturated MgxZn1-xO alloy films and MgxZn1-xO/ZnO heterointerfaces
    Ohtomo, A
    Shiroki, R
    Ohkubo, I
    Koinuma, H
    Kawasaki, M
    [J]. APPLIED PHYSICS LETTERS, 1999, 75 (26) : 4088 - 4090
  • [10] Single crystalline ZnO films grown on lattice-matched ScAlMgO4(0001) substrates
    Ohtomo, A
    Tamura, K
    Saikusa, K
    Takahashi, K
    Makino, T
    Segawa, Y
    Koinuma, H
    Kawasaki, M
    [J]. APPLIED PHYSICS LETTERS, 1999, 75 (17) : 2635 - 2637