Fig. 3: Operating principle of BD LED under positive and negative bias.
From: Bidirectional light-emitting diode as a visible light source driven by alternating current
a, d Power supply schemes, b, e band diagrams and c, f magnification of the active region of the BD LED under positive and negative biases, respectively. The band diagrams were calculated for a current densities of 1 kAcm−2 and −1 kAcm−2.
