Fig xA Calculated electronic absorption spectra

On the other hand, there is a slight improvement in the IPCE of KNS2 in the presence of CDCA in the entire visible region from 350 to 600 nm is completely in accordance with the observed Jsc as shown in the photovoltaic characteristics. In spite of a little extended wavelength photon harvesting in KNS2 as compared KNS1, it shows hampered photon harvesting which could partly be attributed to reduced energy barrier of electron injection for KNS2 (0.65 eV) compared to KNS1 (0.95 eV) as confirmed from the energy band diagram shown in the Fig.