Electrical Behaviors of LEDs Prepared by Wide-Band GaN Material
Electrical behaviors of light-emitting diodes (LEDs) prepared by wide-band GaN material were measured accurately using alternating-current (AC) small-signal together with an I-V plot. An abnormal negative capacitance (NC) was observed in all measurend LEDs, and at the same voltage the lower the frequency is, the more obvious NC is. Form the slopes of ln(I)-V plot and the relation between NC and voltage the ideality factor was approximately obtained.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Y. Li et al., "Electrical Behaviors of LEDs Prepared by Wide-Band GaN Material", Advanced Materials Research, Vols. 284-286, pp. 2202-2206, 2011