Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/4214
標題: 氮化銦鎵發光二極體之光電特性分析
Analyzed the electrical and optical properties of the InGaN light-emitting diodes
作者: 施攸螢
Shih, Yu-Ying
關鍵字: 氮化鎵
InGaN
發光二極體
LED
出版社: 精密工程學系所
引用: [1]G. Fasol, “Room-Temperature Blue Gallium Nitride Laser Diode,” Science, Vol.272, pp. 1751(1996) [2]F. A. Ponce and D. P. Bour, “Nitride-based semiconductors for blue and green light-emitting devices,” Nature, Vol.386,pp.351-359(1997) [3] A. Hori, D. Yasunaga, A. Satake, and K. Fujiwara,“Temperature dependence of electroluminescence intensity of green and blue InGaN single-quantum-well light-emitting diodes” Appl. Phys. Lett.Vol. 79, No. 22,(2001) [4] A. Hori, D. Yasunaga, A. Satake, and K. Fujiwara, “Temperature and injection current dependence of electroluminescence intensity in green and blue InGaN single-quantum-well light-emitting diodes”, J. Appl. Phys.Vol. 93, No. 6,(2003) [5] N. Otsuji and K. Fujiwara, , “Electroluminescence efficiency of blue InGaN/GaN quantum-well diodes with and without an n-InGaN electron reservoir layer”, J. Appl. Phys.Vol. 100, 113105,(2003) [6] Y. Yamane and K. Fujiwara,, “Largely variable electroluminescence efficiency with current and temperature in a blue InGaN multiple-quantum-well diode”, Appl. Phys. Lett.Vol.91, 073501 [7]M. Ferhat, and F. Bechstedt, , “First-principles of gap bowing in InxGa1-xN and InxAl1-xN alloys: Relation to structural and thermodynamic properties,” Phys. Rev. B Vol.65, pp. 075213(2002) [8]Kittel, Introduction to Solid State Physical [9]L. Macht, P.R. Hagenan, S. Haffouz, and P. K. Larsen, , “Microphotoluminescence mapping of laterally overgrown GaN layers on patterned Si(111) substrates,” Appl. Phys. Lett. Vol.87,pp. 131904(2005) [10]Su-Huai Wei, NCPV and Dolar Program Review Meeting, pp. 713(2003) [11]T.Takeuchi,C.Kisielowski,V.Iota,B.A.Weinstein,L.Mattos,N.A.Shapiro,J.Kruger,E.R.Weber,and J. Yang, ,“ Near-field scanning optical microscopy studies of V-grooved quantum wire lasers,” Appl. Phys. Lett.Vol.73,pp.1691(1998) [12] H. Gotoh, T. Tawara, Y. Kobayashi, N. Kobayashi, N. Kobayashi, and T. Saitoh, , “InGaN/GaN quantum wells studied by high pressure, variable temperature, and excitation power spectroscopy,” Appl. Phys. Lett.Vol.83,pp.4791(2003) [13] P. Perlin, C. Kisielowski, V. Iota, B. A. Weinstein, L. Mattos, N. A. Shapiro, J. Kruger, E. R. Weber, and J. Yang, , “ InGaN/GaN quantum wells studied by high pressure, variable temperature, and excitation power spectroscopy,” Apple. Phys. Lett.Vol.73,pp.2778 (1998) [14]Lun Daia, and Bei Zhang, , “Comparison of optical transitions in InGaN quantum well structures and microdisks,” J. Appl. Phys. Vol.89, pp. 4951(2001) [15] Fabio Bernardini, and Vincenzo Fiorentini,“Macroscopic polarization and band offsets at nitride heterojunctions,” Phys. Rev. B, Vol. 57, pp. R9427 (1998) [16]Hadis Morkoc, Nitride Semiconductors and Devices [17]Hisashi Masui, Junichi Sonoda, Nathan Pfaff, Ingrid Koslow, Shuji Nakamura and Steven P DenBaars “Quantum-confined Stark effect on photoluminescence and electroluminescence characteristics of InGaN-based light-emitting diodes”J. Phys. D: Appl. Phys. 41(2008)165105 [18]Di Zhu, Jiuru Xu, Ahmed N. Noemaun, Jong Kyu Kim, E. Fred Schubert, Mary H. Crawford, and Daniel D. Koleske “The origin of the high diode-ideality factors in GaInN/GaN multiple quantum well light-emitting diodes”Apple. Phys. Lett.94, 081113 (2009) [19]Y. Yamane and K. Fujiwara,“Largely variable electroluminescence efficiency with current and temperature in a blue (In, Ga)N multiple-quantum-well diode”Apple. Phys. Lett.91, 073501(2007) [20]A. Hori, D. Yasunaga, A. Satake, and K. Fujiwara,“Temperature and injection current dependence of electroluminescence intensity in green and blue InGaN single-quantum-well light-emitting diodes” J. Appl. Phys. Volume 93, number 6
摘要: 本論文利用變溫光激發螢光系統以及電激發光系統,針對氮化銦鎵結構的發光二極體做了一系列的光性與電性分析。在光激發螢光系統上,以405nm波長的雷射作為激發光源,在外加偏壓測試環境下可以發現室溫(300K)強度因載子熱效應與穿隧效應而快速遞減,導致內部量子效率較實際值低。在外加直流電流(-1mA~1mA)之下觀察變溫電激發光光譜,所得零電流(開路電壓)時之內部量子效率為44.6%與變溫光激發螢光量測所得之41.8%值差異較為接近。在變溫環境下量測EL系統,利用小電流(0.01mA~1mA)以及大電流(20~40mA)觀察在變溫環境下的光性與電性變化。可以發現20毫安電激發光操作下在100K時最強發光強度,所計算之發光強度與發光效率所計算之內部量子效率分為61.6%與64.8%。歸納結論可知(1)在PL系統下外加偏壓,室溫會因穿遂效應的影響導致IQE較實際值低。(2)在零電流(開路電壓)的光激發螢光量測下所求得內部量子效率與一般光激發螢光量測值較為接近。(3)在偏壓光激螢光量測下,外加順向偏壓由於室溫電流大於低溫電流導致IQE與實際值不符。(4)電激發光量測所得之內部量子效率高於光激螢光量測,與元件實際內部量子效率接近。
In this thesis, the electrical and optical properties of the InGaN light-emitting diodes were analyzed by the temperature-dependent electroluminescence and photoluminescence systems. During the PL measurement excited by 405nm diode laser, the decreasing PL intensities of the biased LED sample were observed by increasing the measurement temperature that was caused by the thermal and tunneling effect to have the lower internal quantum efficiency (IQE). According to the temperature-dependent EL spectrum under injection current between -1mA to 1mA, the IQE value at Voc (open-circuit voltage) is 44.6% that was close to the temperature-dependent PL IQE value of 41.8%. The changes of the electrical and optical properties were characterized by injected small (0.01mA~1mA) and larger current (20mA~40mA) in the temperature-dependent EL measurement, the strongest EL intensity was observed at 100K. The IQE of EL spectrum intensity and efficiency are 61.6% and 64.8%, respectively. The conclusions are described as following. First, the IQE of PL with bias would be lower than the actual value caused by the tunneling effect at room temperature. Second, the IQE of PL spectrum at zero current condition (open-circuit voltage) is closer to the normal PL value. Third, IQE of bias-dependent PL does not correspond to the actual value because of the current at room temperature is higher than at 30K. Finally, the IQE of EL measurement is higher than PL measurement that the IQE of EL measurement is similar to the actual IQE of InGaN LEDs.
URI: http://hdl.handle.net/11455/4214
其他識別: U0005-1308200914322100
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1308200914322100
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