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半导体碳纳米管中的高能激子

DOI: 10.6054/j.jscnun.2014.06.001, PP. 41-44

Keywords: 发光二极管,GaN?,InGaN,多量子阱,碳纳米管,组态相互作用,激子,吸收谱

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Abstract:

利用单激发组态相互作用(SCI)方法,对半导体性单壁碳纳米管的电子结构和光学吸收谱进行理论计算.结果表明,激发碳纳米管得到了由电子空穴对相互束缚而成的激子,除了实验上常观测到的低能激子态之外,在高能处,甚至在连续能带中还出现了激子.部分高能激子来源于类似表面态的激发.

References

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[103]  HHAN S H, LEE D Y, LEE S J, et al.Effect of electron blocking layer on efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes[J].Appl Phys Lett,2009,94:231123-
[104]  HAN S H, CHO C Y, LEE S J, et al.Effect of Mg doping in the barrier of InGaN/GaN multiple quantum well on optical power of light-emitting diodes[J].Appl Phys Lett,2010,96:051113-
[105]  VURGAFTMAN I, MEYER J R.Band parameters for nitrogen-containing semiconductors[J].J Appl Phys,2003,94:3675-
[106]  NEUFELD C J, CRUZ S C, FARRELL R M, et al.Effect of doping and polarization on carrier collection in InGaN quantum well solar cells[J].Appl Phys Lett,2011,98:243507-
[107]  WWANG C H, CHEN J R, CHIU C H, et al.Temperature-Dependent Electroluminescence Efficiency in Blue InGaN-GaN Light-Emitting Diodes With Different Well Widths[J].IEEE Photon Technol Lett,2010,22:236-238
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[110]  HHAN S H, LEE D Y, LEE S J, et al.Effect of electron blocking layer on efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes[J].Appl Phys Lett,2009,94:231123-
[111]  HAN S H, CHO C Y, LEE S J, et al.Effect of Mg doping in the barrier of InGaN/GaN multiple quantum well on optical power of light-emitting diodes[J].Appl Phys Lett,2010,96:051113-
[112]  VURGAFTMAN I, MEYER J R.Band parameters for nitrogen-containing semiconductors[J].J Appl Phys,2003,94:3675-
[113]  NEUFELD C J, CRUZ S C, FARRELL R M, et al.Effect of doping and polarization on carrier collection in InGaN quantum well solar cells[J].Appl Phys Lett,2011,98:243507-
[114]  BBOCHKAREVA N I, VORONENKOV V V, GORBUNOV R I, et al.Defect-related tunneling mechanism of efficiency droop in III-nitride light-emitting diodes[J].Appl Phys Lett,2010,96:133502-
[115]  DDAVID A, GRUNDMANN M J, KAEDING J F, et al.Carrier distribution in (0001)InGaN/GaN multiple quantum well light-emitting diodes[J].Appl Phys Lett,2008,92:053502-
[116]  HHAN S H, LEE D Y, LEE S J, et al.Effect of electron blocking layer on efficiency droop in InGaN/GaN multiple quantum well light-emitting diodes[J].Appl Phys Lett,2009,94:231123-
[117]  HAN S H, CHO C Y, LEE S J, et al.Effect of Mg doping in the barrier of InGaN/GaN multiple quantum well on optical power of light-emitting diodes[J].Appl Phys Lett,2010,96:051113-
[118]  VURGAFTMAN I, MEYER J R.Band parameters for nitrogen-containing semiconductors[J].J Appl Phys,2003,94:3675-
[119]  NEUFELD C J, CRUZ S C, FARRELL R M, et al.Effect of doping and polarization on carrier collection in InGaN quantum well solar cells[J].Appl Phys Lett,2011,98:243507-
[120]  HAN S H, CHO C Y, LEE S J, et al.Effect of Mg doping in the barrier of InGaN/GaN multiple quantum well on optical power of light-emitting diodes[J].Appl Phys Lett,2010,96:051113-
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[122]  NEUFELD C J, CRUZ S C, FARRELL R M, et al.Effect of doping and polarization on carrier collection in InGaN quantum well solar cells[J].Appl Phys Lett,2011,98:243507-
[123]  KKIM M H, SCHUBERT M F, DAI Q, et al.Origin of efficiency droop in GaN-based light-emitting diodes[J].Appl Phys Lett,2007,91:183507-
[124]  SSCHUBERT M F, XU J, KIM J K, et al.Polarization-matched GaInN/AlGaInN multi-quantum-well light-emitting diodes with reduced efficiency droop[J].Appl Phys Lett,2008,93:041102-
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