Organic Complementary D Flip-Flops Enabled by Perylene Diimides and Pentacene

The development of organic complementary circuits has been largely limited by the development of suitable organic n-channel transistors. However, recent advances have led to materials such as the high-mobility air-stable n-channel organic semiconductor,
$N,N^prime$
-bis(n-octyl)-dicyanoperylene-3, 4 : 9, 10-bis(dicarboximide), PDI-
$hbox8CN_2$
. Here, the fabrication of an organic complementary D flip-flop using PDI-
$hbox8CN_2$
n-channel transistors and pentacene p-channel transistors is described. The measured clock-to-output delay is 25
$muhboxs$
for 1 kHz, and 14
$muhboxs$
at the clock frequency of 5 kHz. This is the fastest clock speed for an organic complementary circuit yet achieved.