Ordered and ultrathin reduced graphene oxide LB films as hole injection layers for organic light-emitting diode

Table 1 Performance of devices with different films as hole injecting layer

Device	Driving voltage (V) for 100 mA/cm²	Max luminance (cd/m², 12 V)	Luminance efficiency (cd/A, 12 V)
PEDOT:PSS spin-coating film	11.7	4,435	2.9
GO spin-coating film	12.1	2,253	1.9
RGO spin-coating film	11.4	4,107	3.0
RGO LB film	9.6	6,232	3.8