Figure 2. Device performance of single junction solar cells, and performance parameters of optimized device with PDMS (0.5 mg ml⁻¹) as additive under varied light intensity (from 1.2 to 100 mW cm⁻²).

(a), Current density versus voltage (J–V) curves under AM 1.5 G irradiation at 100 mW cm⁻². (b), Absorption spectra, EQE and IQE. (c), J_SC as a function of light intensity in a double-logarithmic scale for devices using PDMS as additive. (d), V_OC as a function of light intensity in a semi-logarithmic scale for devices using PDMS as additive.