Frontiers of Optoelectronics, Volume. 9, Issue 2, 318(2016)

Size-dependent optical properties of InGaN quantum dots in GaN nanowires grown by MBE

Yanxiong E, Zhibiao HAO*, Jiadong YU, Chao WU, Lai WANG, Bing XIONG, Jian WANG, Yanjun HAN, Changzheng SUN, and Yi LUO
Author Affiliations
  • Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University,Beijing 100084, China
  • show less

    Quantum dots in nanowires (DINWs) are considered as important building blocks for novel nanoscale semiconductor optoelectronic devices. In this paper, pure axial heterojunction InGaN/GaN DINWs are grown by using plasma-assisted molecular beam epitaxy (PA-MBE) system. The InGaN quantum dots (QDs) are disk-like observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The diameter of QDs can be controlled by the growth conditions of nanowires (NWs), while the thickness of QDs can be controlled by the growth time of InGaN. Temperature-dependent photoluminescence (TDPL) measurements demonstrate that the PL peak of DINWs with small and uniform sizes shows a general red shift with increasing temperature. However, the PL peak of DINWs with non-uniform sizes shows an abnormal blue shift with increasing temperature, which is due to different internal quantum efficiencies of the DINWs with different sizes.

    Tools

    Get Citation

    Copy Citation Text

    Yanxiong E, Zhibiao HAO, Jiadong YU, Chao WU, Lai WANG, Bing XIONG, Jian WANG, Yanjun HAN, Changzheng SUN, Yi LUO. Size-dependent optical properties of InGaN quantum dots in GaN nanowires grown by MBE[J]. Frontiers of Optoelectronics, 2016, 9(2): 318

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: RESEARCH ARTICLE

    Received: Jan. 28, 2016

    Accepted: Feb. 15, 2016

    Published Online: Oct. 21, 2016

    The Author Email: Zhibiao HAO (zbhao@tsinghua.edu.cn)

    DOI:10.1007/s12200-016-0613-4

    Topics