Fig. 5From: Nitrogen-Doped Carbon Dots for “green” Quantum Dot Solar Cells a UV–vis DRS spectra of TiO2 and NCD/TiO2 photoanode. Insets are the photographs of TiO2 and NCD/TiO2 photoanode. b A proposed model of photoinduced electron transition between NCDs and TiO2. c Current density–voltage characteristics and (d) IPCE action spectrum of NCD-sensitized solar cellsBack to article page