Role of Vanadium Pentoxide Hole-Extracting Nanolayer in Rubrene/C₇₀-Based Small Molecule Organic Solar Cells

Table 1

Characteristics (𝜂_𝑃, 𝐽_SC, 𝑉_OC, FF, and 𝑅_𝑆) of OSCs with V₂O₅ as the hole-extracting layer (varied thickness). The optimum V₂O₅ thickness is 3 nm (bold values).

Hole-extracting layer (nm)	PCE (%)	𝐽SC (mA/cm^2)	𝑉OC (V)	FF (%)	𝑅𝑆 (Ω cm^2)
0	0.425	2.304±0.2	0.51±0.05	36.2±0.6	95.7
2	1.557	4.289±0.2	0.88±0.01	41.2±0.7	43.0
3	1.745	𝟒.𝟓𝟖𝟑±𝟎.𝟐	𝟎.𝟖𝟖±𝟎.𝟎𝟏	𝟒𝟑.𝟑±𝟎.𝟏	40.0
6	1.651	4.606±0.3	0.88±0.01	40.8±0.4	41.2
10	1.390	3.711±0.1	0.90±0.02	41.6±0.8	68.0
15	1.320	3.642±0.06	0.88±0.01	41.2±0.3	59.5
20	1.238	3.563±0.1	0.86±0.02	40.4±1.0	63.2
25	1.110	3.128±0.2	0.88±0.02	40.3±1.0	71.5
30	0.731	2.742±0.1	0.88±0.01	30.3±1.0	365