Optical and electrical degradation behavior of GaN-based UV-A laser diodes
Yujie Huang,
Jing Yang,
Degang Zhao
et al.
Abstract:The degradation mechanism of GaN-based ultraviolet (UV-A) laser diodes (LDs) is analyzed by studying the changes of their electrical and optical properties after aging process with the operation current below the threshold current (Ith). After aging treatment, Ith increases, the slope efficiency decreases, and the leakage current increases. In particular, the emission spectra of aged LD show significant broadening, with additional peaks on the shorter wavelength side. Both cathodoluminescence and deep level tr… Show more
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