Comparative study of Cs,O coadsorption on Ga0.75Al0.25N (0001) and (001) surfaces

被引：7
|
作者：
Yang, Mingzhu [1 ]
Guo, Jing [2 ]
Liu, Zhanhui [1 ]
Fu, Xiaoqian [3 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Nanjing 210044, Jiangsu, Peoples R China
[2] Nanjing Inst Technol, Sch Automat, Nanjing 210044, Jiangsu, Peoples R China
[3] Univ Jinan, Sch Informat Sci & Engn, Jinan 250022, Shandong, Peoples R China
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2019年 / 51卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Ga075Al025N (0001) surface; Ga075Al025N (001) (2x2) reconstruction surface; Work function; Cs-O dipole; Fish scale field" effect; ELECTRONIC-STRUCTURE; ALGAN FILMS; PHOTOEMISSION; PHOTOCATHODES; PERFORMANCE; ADSORPTION;
D O I：
10.1007/s11082-019-1757-4
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Based on first principle calculations, we carried out comparative research of Cs,O coadsorption on Ga0.75Al0.25N (0001) surface and Ga0.75Al0.25N (001) (2x2) reconstruction surface. On the (0001) surface, the average coordinate difference between Cs and O atoms along [0001] direction is obviously smaller than that along [001] direction on (001) (2x2) reconstruction surface. This is due to the existence of dimers and trenches on the (001) (2x2) reconstruction surface. Cs atoms are favored to locate on the dimers while O atoms are favored to locate in the trenches. As a result, Cs-O dipoles on (001) (2x2) reconstruction surface make an important contribution on lowering work function. For both (0001) and (001) (2x2) reconstruction surface, work function values fluctuate up and down at the stage of Cs,O alternative adsorption, and the valley values are smaller and smaller. The site of Mg dopant has an influence on work function of the surfaces, which results in the fish scale field effect.
引用
收藏
页数：12
相关论文
共 50 条
  • [1] Comparative study of Cs,O coadsorption on Ga0.75Al0.25N (0001) and (001) surfaces
    Mingzhu Yang
    Jing Guo
    Zhanhui Liu
    Xiaoqian Fu
    Optical and Quantum Electronics, 2019, 51
  • [2] Theoretical study on optoelectronic properties of Ga0.75Al0.25N (001) reconstruction surfaces
    Yang, Mingzhu
    Chang, Benkang
    Guo, Jing
    Hao, Guanghui
    Shi, Feng
    Wang, Honggang
    Wang, Meishan
    APPLIED SURFACE SCIENCE, 2013, 287 : 1 - 7
  • [3] Theoretical study on electronic structure and optical properties of Ga0.75Al0.25N(0001) surface
    Yang Mingzhu
    Chang Benkang
    Hao Guanghui
    Guo Jing
    Wang Honggang
    Wang Meishan
    APPLIED SURFACE SCIENCE, 2013, 273 : 111 - 117
  • [4] Comparative Research on Cs Activation Mechanism for Al0.5Ga0.5As (001) and Al0.25Ga0.75N (0001) Surface
    Shen, Yang
    Chen, Liang
    Su, Lingai
    Qian, Yunsheng
    Xu, Sunan
    Zhang, Shuqin
    IEEE SENSORS JOURNAL, 2015, 15 (09) : 5252 - 5257
  • [5] Electronic structure and optical properties of nonpolar Ga0.75Al0.25N surfaces
    Yang, Mingzhu
    Chang, Benkang
    Hao, Guanghui
    Guo, Jing
    Shi, Feng
    Wang, Meishan
    OPTIK, 2014, 125 (20): : 6260 - 6265
  • [6] Optical properties of Ga0.75Al0.25N with interstitial defects
    Yang, Mingzhu
    Chang, Benkang
    Hao, Guanghui
    Wang, Honggang
    Wang, Meishan
    OPTIK, 2015, 126 (22): : 3349 - 3352
  • [7] Cs,O coadsorption on Al0.5Ga0.5N(0001) surface
    Ji, Yanjun
    Bian, Li
    Liu, Ni
    Wang, Junping
    Wang, Caifeng
    Du, Yujie
    Liu, Youwen
    MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2022, 138
  • [8] Effect of residual gas on the optoelectronic properties of Mg-doped Ga0.75Al0.25N (0001) surface
    Fang, Qianglong
    Shen, Yang
    Yang, Xiaodong
    Zhang, Shuqin
    Chen, Liang
    Duan, Lingze
    Jin, Shangzhong
    APPLIED SURFACE SCIENCE, 2021, 551
  • [9] Study of Cs adsorption on Ga(Mg)0.75Al0.25N (0001) surface: A first principle calculation
    Yang, Mingzhu
    Chang, Benkang
    Hao, Guanghui
    Guo, Jing
    Wang, Honggang
    Wang, Meishan
    APPLIED SURFACE SCIENCE, 2013, 282 : 308 - 314
  • [10] Electronic structure of wurtzite Ga0.75Al0.25N: a first principle calculation
    Yang, Mingzhu
    Wang, Meishan
    MECHATRONICS ENGINEERING, COMPUTING AND INFORMATION TECHNOLOGY, 2014, 556-562 : 43 - +
12345