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Considering the coexisting of electron resonant tunneling and miniband transport processes in a split-level energy system, and the effect of photogenerated carrier, we propose an optoelectronic transport theoretical model for the nanosilicon structure. We employ this model to calculate current density, electric field and electron density distribution under illumination, and the results show that resonant tunneling plays a major role in transporting the photogenerated electrons in a nanosilicon structure. Furthermore, we study the relationship between the photocurrent and the absorption coefficients, the applied bias, and the number of nanolayers. It is found that under certain conditions, hopping phenomenon occurs with photocurrent increasing, which is due to the redistribution of electric field inside the nanosilicon structure.
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Keywords:
- photocurrent /
- optoelectronic transport /
- resonant tunneling /
- nanodot
[1] Martí A, Antolm E, Stanley C R, Farmer C D, Lopez N, Diaz P, Canovas E, Linares P G, Luque A 2006 Phys. Rev. Lett. 97 247701
[2] Xu Y, Diao H W, Zhang S B, Li X D, Zeng X B, Wang W J, Liao X B 2007 Acta Phys. Sin. 56 2915 (in Chinese) [许 颖、刁宏伟、张世斌、励旭东、曾湘波、王文静、廖显伯 2007 56 2915]
[3] Hao X J, Cho E C, Flynn C, Shen Y S, Park S C, Conibeer G, Green M A 2009 Sol. Energy Mater. Sol. Cells 93 273
[4] Shen Y, Bao J, Dai N 2009 Appl. Surf. Sci. 255 3908
[5] Wu Z M, Lei Q S, Geng X H, Zhao Y, Sun J, Xi J P 2006 Chin. Phys. B 15 2713
[6] Ma Z Y, Guo S H, Chen D Y, Wei D Y, Yao Y, Zhou J, Huang R, Li W, Xu J, Xu L, Huang X F, Chen K J, Feng D 2008 Chin. Phys. B 17 303
[7] Liu Y S, Chen K, Qiao F, Huang X F, Han P, Gao Q B, Ma Z Y, Li W, Xu J, Chen K J 2006 Acta Phys. Sin. 55 5403 (in Chinese) [刘艳松、陈 铠、乔 峰、黄信凡、韩 培、高钱波、马忠元、李 伟、徐 骏、陈坤基 2006 55 5403]
[8] Chen X Y, Shen W Z 2004 Appl. Phys. Lett. 85 287
[9] Chen J, Lu J J, Pan W, Zhang K, Chen X Y, Shen W Z 2007 Nanotechnology 18 015203
[10] Pan W, Lu J J, Chen J, Shen W Z 2006 Phys. Rev. B 74 125308
[11] Hu Z H, Liao X B, Zeng X B, Xu Y Y, Zhang S B, Diao H W, Kong G L 2003 Acta Phys. Sin. 52 217 (in Chinese) [胡志华、廖显伯、曾湘波、徐艳月、张世斌、刁宏伟、孔光临 2003 52 217]
[12] Luque A, Martí A 1997 Phys. Rev. Lett. 78 5014
[13] Wang J L, Wu E X 2007 Chin. Phys. B 16 848
[14] Aroutiounian V, Petrosyana S, Khachatryan A 2005 Sol. Energy Mater. Sol. Cells 89 165
[15] Tomic S, Nicholas M, Timothy H, Jones S 2008 Opt. Quantum Electron. 40 313
[16] Ye Q Y, Tsu R, Nicollian E H 1991 Phys. Rev. B 44 1806
[17] Kunz R E, Scholl E 1993 Phys. Rev. B 47 4337
[18] Prengel F, Wacker A, Scholl E 1994 Phys. Rev. B 50 1705
[19] Gonzalez J C, Matinaga F M, Rodrigues W N, Moreira M V B, de Oliveira A G, da Silva M I N, Vilela J M C, Andrade M S, Ugarte D, Silva P C 2000 Appl. Phys. Lett. 76 3400
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[1] Martí A, Antolm E, Stanley C R, Farmer C D, Lopez N, Diaz P, Canovas E, Linares P G, Luque A 2006 Phys. Rev. Lett. 97 247701
[2] Xu Y, Diao H W, Zhang S B, Li X D, Zeng X B, Wang W J, Liao X B 2007 Acta Phys. Sin. 56 2915 (in Chinese) [许 颖、刁宏伟、张世斌、励旭东、曾湘波、王文静、廖显伯 2007 56 2915]
[3] Hao X J, Cho E C, Flynn C, Shen Y S, Park S C, Conibeer G, Green M A 2009 Sol. Energy Mater. Sol. Cells 93 273
[4] Shen Y, Bao J, Dai N 2009 Appl. Surf. Sci. 255 3908
[5] Wu Z M, Lei Q S, Geng X H, Zhao Y, Sun J, Xi J P 2006 Chin. Phys. B 15 2713
[6] Ma Z Y, Guo S H, Chen D Y, Wei D Y, Yao Y, Zhou J, Huang R, Li W, Xu J, Xu L, Huang X F, Chen K J, Feng D 2008 Chin. Phys. B 17 303
[7] Liu Y S, Chen K, Qiao F, Huang X F, Han P, Gao Q B, Ma Z Y, Li W, Xu J, Chen K J 2006 Acta Phys. Sin. 55 5403 (in Chinese) [刘艳松、陈 铠、乔 峰、黄信凡、韩 培、高钱波、马忠元、李 伟、徐 骏、陈坤基 2006 55 5403]
[8] Chen X Y, Shen W Z 2004 Appl. Phys. Lett. 85 287
[9] Chen J, Lu J J, Pan W, Zhang K, Chen X Y, Shen W Z 2007 Nanotechnology 18 015203
[10] Pan W, Lu J J, Chen J, Shen W Z 2006 Phys. Rev. B 74 125308
[11] Hu Z H, Liao X B, Zeng X B, Xu Y Y, Zhang S B, Diao H W, Kong G L 2003 Acta Phys. Sin. 52 217 (in Chinese) [胡志华、廖显伯、曾湘波、徐艳月、张世斌、刁宏伟、孔光临 2003 52 217]
[12] Luque A, Martí A 1997 Phys. Rev. Lett. 78 5014
[13] Wang J L, Wu E X 2007 Chin. Phys. B 16 848
[14] Aroutiounian V, Petrosyana S, Khachatryan A 2005 Sol. Energy Mater. Sol. Cells 89 165
[15] Tomic S, Nicholas M, Timothy H, Jones S 2008 Opt. Quantum Electron. 40 313
[16] Ye Q Y, Tsu R, Nicollian E H 1991 Phys. Rev. B 44 1806
[17] Kunz R E, Scholl E 1993 Phys. Rev. B 47 4337
[18] Prengel F, Wacker A, Scholl E 1994 Phys. Rev. B 50 1705
[19] Gonzalez J C, Matinaga F M, Rodrigues W N, Moreira M V B, de Oliveira A G, da Silva M I N, Vilela J M C, Andrade M S, Ugarte D, Silva P C 2000 Appl. Phys. Lett. 76 3400
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