Organic photodetector device (OPD) physical properties with three different electron blocking layer materials.

Material	Thickness (nm)	Photo current density (A cm−2)	Dark current density (A cm−2)	On–off current ratio	Detectivity (Jones, at 520 nm)
HfO2	5.5	5.27 × 10−3	4.15 × 10−8	1.27 × 105	1.76 × 1012
Al2O3	6.0	7.51 × 10−7	3.53 × 10−8	2.13 × 101	9.16 × 1010
PEDOT:PSS	30	8.26 × 10−3	5.00 × 10−6	1.60 × 103	2.01 × 1011