期刊文献+

具有三角形InGaN/GaN多量子阱的高内量子效率的蓝光LED(英文) 被引量:5

High Internal Quantum Efficiency Blue Light-emitting Diodes with Triangular Shaped InGaN/GaN Multiple Quantum Wells
下载PDF
导出
摘要 对InGaN量子阱LED的内量子效率进行了优化研究。分别对发光光谱、量子阱中的载流子浓度、能带分布、静电场和内量子效应进行了理论分析。对具有不同量子阱数量的InGaN/GaN LED进行了理论数值比对研究。研究结果表明,对于传统结构的LED而言,2个量子阱的结构相对于5个和7个量子阱具有更好的光学性能。同时还研究了具有三角形量子阱结构的LED,研究结果显示,三角形多量子阱结构具有较高的电致发光强度、更高的内量子效率和更好的发光效率,所有的优点都归因于较高的电子-空穴波函数重叠率和低的Stark效应所产生的较高的载流子输入效率和复合发光效率。 The internal quantum efficiency(IQE) of InGaN quantum wells(QWs) light-emitting diodes(LEDs) is numerically investigated,which involved its emission spectra,carrier concentrations,energy band,electrostatic field and internal quantum efficiency.Optical properties of InGaN/GaN LEDs with varied QW numbers are numerically studied.The results reveal that,for the LEDs with conventional rectangular shaped QWs,two quantum wells(2-QWs) units structure has better optical performance than 5-QWs and 7-QWs structures.The advantages of nitride-based LEDs with triangular shaped InGaN/GaN multiple quantum wells(MQWs) are also discussed.The simulation results indicate that the triangular shaped MQW LEDs exhibit a higher electrical luminescence(EL) intensity,higher IQE and a stronger light-output power than the conventional rectangular MQW LEDs.All the advantages are due to the higher carrier injection efficiency and recombination rate which are caused by the higher electron-hole wave function overlap,and small quantum confined stark effect(QCSE).
出处 《发光学报》 EI CAS CSCD 北大核心 2013年第1期66-72,共7页 Chinese Journal of Luminescence
基金 国家自然科学基金(61176043) 广东省战略性新兴产业专项资金(2010A081002005,2011A081301003) 广东省教育部产学研结合项目(2010B090400192)资助项目
关键词 发光二极管 三角形量子阱 数值模拟 light-emitting diodes triangular shaped quantum well numerical simulation
  • 相关文献

参考文献4

二级参考文献74

  • 1Nakamura S.The blue laser diode:GaN based light emitters and lasers[J].Mater.Sci.Eng.B,1997,50(20):272-279. 被引量:1
  • 2Cao X A,LeBoeuf S F,Rowland L B.Temperature-dependent emission intensity and energy shift in InGaN/GaN multiple-quantum-well light-emitting diodes[J].Appl.Phys.Lett.,2003,82(21):3614-3616. 被引量:1
  • 3Hurst P,Dawson P,Levetas S A.Temperature dependent optical properties of InGaN/GaN quantum well structures[J].Phys.Star.Sol.(b),2001,228(1):137-140. 被引量:1
  • 4Jeong Y H.A comparative study of the internal quantum efficiency for the green MQWs grown on sapphire and FS-GaN substrates[J].Phys.Star.Sol.(c),2007,4(1):187-191. 被引量:1
  • 5Cho Y H,Gainer G H,Fischer A J,et al.S-shaped temperature dependent emission shift and carrier dynamics in InGaN/GaN multiple quantum wells[J].Appl.Phys.Lett.,1998,73(10):1370-1372. 被引量:1
  • 6Nakamura S,Senoh M,Iwasa N,et al.Superbright green InGaN single quantum well structure light-emitting diodes[J].Jpn.J.Appl.Phys.B,1994,34(10):L1332-L1335. 被引量:1
  • 7Chichibu S,Azuhata T,Sota T,et al.Spontaneous emission of localized excitons in InGaN single and muhiquantum well structures[J].Appl.Phys.Lett.,1996,69(27):4187-4189. 被引量:1
  • 8Chichibu S F,Azuhata T,Sota T,et at.Localized quantum well excitons in InGaN single-quantum-well amber hght-emitring diodes[J].Appl.Phys.Leu.,2001,79(3):341-343. 被引量:1
  • 9Zheng Dayu.Characterization and analysis on optics character of semiconductor luminescence material[D].Yantai:Yantai University,2005. 被引量:1
  • 10Son J H,Lee J L.Strain engineering for the solution of efficiency droop in InGaN/GaN light-emitting "diodes[J].Optics Express,2010,18(6):5466-5469. 被引量:1

共引文献16

同被引文献58

  • 1李国斌,陈长水,刘颂豪.In含量对InGaN/GaN LED光电性能的影响[J].发光学报,2013,34(9):1233-1239. 被引量:4
  • 2夏瑞东,常悦,庄蔚华.双异质结激光器的Auger复合分析[J].电子学报,1995,23(8):112-115. 被引量:1
  • 3陈其道.1.3μm InGaAsP/InP双异质结激光器阈值电流与温度的关系[J].半导体光电,1990,11(2):156-161. 被引量:1
  • 4Muramoto Y, Kimura M, Dempo A, et al. High-efficiency UV LEDs and RGB white LEDs for lighting and LCD backlights [J]. J. Soc. Inf. Disp., 2011, 19(12):907-912. 被引量:1
  • 5Pimputkar S, Speck J, DenBaars S P, et al. Prospects for LED lighting [J]. Nat. Photonics, 2009, 3(4) :180-182. 被引量:1
  • 6Horiuchi N. Light-emitting diodes: Natural white light [ J]. Nat. Photonics, 2010, 4( 11 ) :738. 被引量:1
  • 7Mukai T, Yamada M, Nakamura S. Characteristics of InGaN-based UV/blue/green/amber/red light-emitting diodes [ J]. Jpn. J. Appl. Phys., Part 1, 1999, 38:3976-3981. 被引量:1
  • 8Sun W, Shatalov M, Deng J, et al. Efficiency droop in 245-247 nm A1GaN light-emitting diodes with continuous wave 2 mW output power [J]. Appl. Phys. Lett., 2010, 96(6) :061102-1-3. 被引量:1
  • 9Kim 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 (18):183507-1-3. 被引量:1
  • 10Schubert M F, Chhajed S, Kim J K, et al. Effect of dislocation density on efficiency droop in GalnN/GaN light-emitting di- odes [J]. Appl. Phys. Lett. , 2007, 91(23):231114-1-3. 被引量:1

引证文献5

二级引证文献6

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部