Abstract
In this work, C3N4 in graphite-like layer structure (graphitic C3N4, g-C3N4) prepared from melamine was applied into quantum dot-sensitized solar cells (QDSCs) as the co-sensitizer of CdS quantum dots (QDs). In the as-prepared photoanodes, g-C3N4 could improve the visible-light absorption and play a supporting role to improve the stability of TiO2 photoanode microstructure simultaneously. Through modifying the content of g-C3N4 in TiO2 photoanode, QDSCs based on 10 wt% g-C3N4 in TiO2 photoanode achieved the most optimal photovoltaic performance. Its short-circuit current density (Jsc) improved greatly, up to 14.08 mA/cm2, 72.5% higher than that of QDSCs without g-C3N4 and furthermore, the power conversion efficiency (PCE) was 4.65% with an increase of 106.7%. The mechanism of effect of g-C3N4 content on the photovoltaic performance of QDSC is investigated systematically through combining photoanodes microstructure characterization with electrochemical impedance (EIS) and current–voltage (J–V) curves analysis of cell samples.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have