Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9789519 | Physica E: Low-dimensional Systems and Nanostructures | 2005 | 4 Pages |
Abstract
The p-n junction photodiodes with InGaN/GaN MQD have been prepared by metal-organic chemical vapor deposition (MOCVD) growth; we achieved nanoscale InGaN self-assembled QDs in the well layers of the active region. The RT PL spectrum peak position for the fabricated InGaN/GaN MQD p-n Junction PDs is located at 464.6Â nm and FWHM is 24.2Â nm. After finishing device process, it was fond that the turn on voltage in forward bias and the break down voltage in reverse bias are about 3 and â13.5Â V, respectively. Furthermore, with 1, 2, and 3Â V applied bias, the maximum responsivity of the fabricated MQD p-n junction PD was observed at 350Â nm, and the minimum of spectral response was measured at 465Â nm. It was also found that the responsivity was nearly a constant from 390 to 440Â nm. It seems to suggest that the spectral response in the range of 390-440Â nm is due to the effect of the InGaN dots-in a-well active layers.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Shang-Chao Hung, Yan-Kuin Su, Shoou-Jinn Chang, Liang-Wen Ji, Dashen Shen, C.H. Huang,