Study on the lattice constants and energy band properties of Be and Ca doped wurtzite ZnO

Zheng Shu-Wen; Fan Guang-Han; Zhang Yong; He Miao; Li Shu-Ti; Zhang Tao

doi:10.7498/aps.61.227101

Abstract

The lattice constants, energy band properties and formation energies of BexZn1-xO, CayZn1-yO and BexCayZn1-x-yO alloys of Be and Ca doped wurtzite ZnO alloys are calculated by the plan-wave pseudopotential method with GGA in density functional theory (DFT). The theoretical results show the lattice constants of BexZn1-xO alloy decrease with Be content increasing, which is contrary to the scenario of CayZn1-yO alloy. For the energy band properties of Be_xZn1-xO and CayZn1-yO alloys, the valence band maxima (VBM) are determined by O 2p states and the conduction band minima (CBM) is occupied by Zn 4s states, and their band gaps are broadened when Be or Ca content is increased. The lattice constant of Be0.125Ca0.125Zn0.75O alloy of Be and Ca co-doped ZnO is matched with that of ZnO and its energy bandgap is greater than that of ZnO, so Be0.125Ca0.125Zn0.75O /ZnO structure is suitable for high-quality ZnO based device. In addition, the stability of Be0.125Ca0.125Zn0.75O alloy is also analysed.

Keywords:

Authors and contacts

1.
Institute of Opto-electronic Materials and Technology, South China Normal University, Guangzhou 510631, China
Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61176043), the Special Funds for Provincial Strategic and Emerging Industries projects of Guangdong (Grant Nos. 2010A081002005, 2011A081301003).

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[22]	Vanderbilt D 1990 Phys. Rev. B 41 7892
[23]	Monkhorst H J, Pack J D 1976 Phys. Rev. B 13 5188
[24]	Fischer T H, Almlof J 1992 J. Phys. Chem. 96 9768
[25]	Tang X, Lü H F, Ma C Y, Zhao J J, Zhang Q Y 2008 Acta Phys. Sin. 57 1066 (in Chinese) [唐鑫, 吕海峰, 马春雨, 赵纪军, 张庆瑜2008 物理学报 57 1066]
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Cited By

[1]	Service R F 1997 Science 276 5314
[2]	Özgür Ü, Alivov Ya I, Liu C, Teke A, Reshchikov M A, Dogan S, Avrutin V, Cho S J, Morkoc H 2005 J. Appl. Phys. 98 041301
[3]	Aoki T, Hat anaka Y, Look D C 2000 Appl. Phys. Lett. 76 3257
[4]	Decremps F, Datchi F, Saitta A M, Polian A 2003 Phys. Rev. B 68 104101
[5]	Jin X L, Lou S Y, Kong D G, Li Y C, Du Z L 2006 Acta Phys. Sin. 55 4809 (in Chinese) [靳锡联, 娄世云, 孔德国, 李蕴才, 杜祖亮 2006 物理学报 55 4809]
[6]	Nazir S, Ikram N, Amin B, Tanveer M, Shaukat A, Saeed A 2009 J. Phys. and Chem. of Solids 70 874
[7]	Ghosh R, Basak D 2007 J. Appl. Phys. 101 113111
[8]	Kong J F, Shen W Z, Zhang Y W, Yang C, Li X M 2008 Appl. Phys. Lett. 92 191910
[9]	Tang C, Li X M, Gu Y F, Yu W D, Gao X D, Zhang Y W 2008 Appl. Phys. Lett. 93 112114
[10]	Ohtomo A, Kawasaki M, Koida T, Masubuchi K, Koinuma H 1998 Appl. Phys. Lett. 72 2466
[11]	Miloua R, Miloua F, Arbaoui A, Kebbab Z, Benramdane N 2007 Solid State Communications 144 5
[12]	Ryu Y R, Lee T S, Lubguban J A, Corman A B, White H W, Leem J H, Han M S, Park Y S, Youn C J, Kim J W 2006 Appl. Phys. Lett. 88 052103
[13]	Kim W J, Leem T H, Han M S, Park I M, Ryu Y R, Lee T S 2006 J. Appl. Phys. 99 096104
[14]	Shi L B, Li R B, Cheng S, Li M B 2009 Acta Phys. Sin. 58 6446 (in Chinese) [史力斌, 李容兵, 成爽, 李明标2009 物理学报 58 6446]
[15]	Ding S F, Fan G H, Li S T, Chen K, Xiao B 2007 Physica B 394 127
[16]	Su X, Si P, Hou Q Y, Kong X L, Cheng W 2009 Physica B 404 1794
[17]	Fan X F, Sun H D, Shen Z X, Kuo J L, Lu Y M 2008 J. Phys: Condens. Matter 20 235221
[18]	Xiong Z H, Shun Z H, Wan Q X, Li D M, Liu G D 2008 Acta Photonica Sinica 37 19
[19]	Huang H C, Gilmer G H, Tomas D 1998 J. Appl. Phys. 84 3636
[20]	Keiji W, Masatoshi S, Hideaki T 2001 Electrochemistry 69 407
[21]	Perdew J P, Chevary J A, Vosko S H 1992 Phys. Rev. B 46 6671
[22]	Vanderbilt D 1990 Phys. Rev. B 41 7892
[23]	Monkhorst H J, Pack J D 1976 Phys. Rev. B 13 5188
[24]	Fischer T H, Almlof J 1992 J. Phys. Chem. 96 9768
[25]	Tang X, Lü H F, Ma C Y, Zhao J J, Zhang Q Y 2008 Acta Phys. Sin. 57 1066 (in Chinese) [唐鑫, 吕海峰, 马春雨, 赵纪军, 张庆瑜2008 物理学报 57 1066]
[26]	Schleife A, Fuchs F, Furthmuller J, Bechstedt F 2006 Phys. Rev. B 73 245212
[27]	Wang Z J, Li S C, Wang L Y, Liu Z 2009 Chin. Phys. B 18 2992
[28]	Han M S, Kim J H., Jeonga T S, Parka J M, Youna C J, Leemb J H, Ryu Y R 2007 Journal of Crystal Growth 303 506
[29]	Tang X, Lü H F, Ma C Y, Zhao J J, Zhang Q Y 2008 Acta Phys. Sin. 57 7806 (in Chinese) [唐鑫, 吕海峰, 马春雨, 赵纪军, 张庆瑜 2008 物理学报 57 7806]
[30]	Wei S H, Zunger A 1988 Phys. Rev.B 37 8958
[31]	Xia J B, Zhu B F, Huang K 1995 Semiconductor Superlattice Physics (Shanghai: Shanghai Science and Technology Press) p19 (in Chinese) [夏建白, 朱邦芬, 黄昆 1995 半导体超晶格物理 (上海: 上海科学技术出版社) 第19页]
[32]	Xu X F, Shao X H 2009 Acta Phys. Sin. 58 1908 (in Chinese) [徐新发, 邵晓红 2009 物理学报 58 1908]
[33]	Paiva R de, Alves J L A, Nogueira R A, Oliveira C de, Alves H W L, Scolfaro L M R, Leite J R 2002 Mater. Sci. Eng. B 93 2

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Vol. 61, Issue 22 - 2012-11-20

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