Fig. 4
From: Large-area plastic nanogap electronics enabled by adhesion lithography
Organic light-emitting nanogap diodes developed using a-Lith. a Schematic of coplanar nano-OLED devices. b Optical micrograph of square-shaped nano-OLED device consisting of asymmetric Al/Au electrodes. c Chemical structures of the various polymers employed and photographs of the corresponding nano-OLEDs in operation: (i) poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO), (ii) poly(9,9-dioctylfluorene-alt-bithiophene) (F8T2), (iii) poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), and (iv) poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMOH-PPV). d Log–log plot of the current–voltage characteristics of a F8T2-based nano-OLED. e Semi-logarithmic plot of the I–V characteristics highlighting the bias region where detectable light emission occurs
