TY - JOUR
T1 - GaN-Based Multiquantum Well Light-Emitting Diodes With Tunnel-Junction-Cascaded Active Regions
AU - Chang, Shoou Jinn
AU - Lin, Wei Heng
AU - Yu, Chun Ta
N1 - Publisher Copyright:
© 1980-2012 IEEE.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - We report the fabrication of GaN-based multiquantum well light-emitting diode (LED) with tunnel-junction (TJ)-cascaded active region. It was found from X-ray diffraction spectra that crystal quality of the TJ LED was almost identical to that of the conventional LED. Compared with the conventional LED, it was found that we could achieve 35% higher output power from the TJ LED due to the repeated use of electrons and holes for photon generation. It was also found that the external quantum efficiency drooped by 26.3% and 18.7% for the TJ LED and the conventional LED, respectively, as we increased the injection current density to 80 A/cm2. Furthermore, it was found that forward voltages measured with an injection current density of 20 A/cm2 were 8.94 V for the TJ LED. The large forward voltage observed from the TJ LED should be attributed to the large TJ resistance.
AB - We report the fabrication of GaN-based multiquantum well light-emitting diode (LED) with tunnel-junction (TJ)-cascaded active region. It was found from X-ray diffraction spectra that crystal quality of the TJ LED was almost identical to that of the conventional LED. Compared with the conventional LED, it was found that we could achieve 35% higher output power from the TJ LED due to the repeated use of electrons and holes for photon generation. It was also found that the external quantum efficiency drooped by 26.3% and 18.7% for the TJ LED and the conventional LED, respectively, as we increased the injection current density to 80 A/cm2. Furthermore, it was found that forward voltages measured with an injection current density of 20 A/cm2 were 8.94 V for the TJ LED. The large forward voltage observed from the TJ LED should be attributed to the large TJ resistance.
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U2 - 10.1109/LED.2015.2397597
DO - 10.1109/LED.2015.2397597
M3 - Article
AN - SCOPUS:84961289645
SN - 0741-3106
VL - 36
SP - 366
EP - 368
JO - IEEE Electron Device Letters
JF - IEEE Electron Device Letters
IS - 4
M1 - 7024909
ER -