Improved Efficiency of Flexible Organic Light-Emitting Diodes by Insertion of Ultrathin SiO₂ Buffer Layers

Table 1

Luminance and efficiency characteristics for the devices with different SiO₂ buffer layer thicknesses at the current density of 20 mA/cm².

SiO2 thickness (nm)	Luminance (cd/m^2)	Voltage (V)	Luminous efficiency (cd/A)
0	1310	17.8	6.4
2	700	14.2	3.8
3	1380	16.8	6.5
4	1550	17.1	7.6
5	820	15.8	4.1
6	420	18.2	2.2
7	78	18	0.72