Abd. Rashid bin Mohd Yusoff
Kyung Hee University, South Korea
Title: Null current hysteresis for acetylacetonate based perovskite solar cells as electron extraction layer
Biography
Biography: Abd. Rashid bin Mohd Yusoff
Abstract
Solution processed zirconium acetylacetonate (Zr(acac)) is succesfully employed as an electron extraction layer, replacing conventional titanium oxide, in planar CH3NH3PbI3 perovskite solar cells. As-prepared Zr(acac) film posseses high transparency, high conductivity, a smooth morphology, high wettability, compatibility with PbI2 DMF solution, and an energy level matching that of CH3NH3PbI3 perovskite material. An average power conversion efficiency of about 11.93%, along with a high filling factor of 74.36%, an open circuit voltage of 1.03 V, and a short-circuit current density of 15.58 mA/cm2. The overall performance of the devices is slight better to that of cells using ruthenium acetylacetonate (Ru(acac)). The difference of solar cells with different electron extraction layers in charge recombination, charge transport and transfer and lifetime are further explored and demonstrate that Zr(acac) is a more effective and promising electron extraction layer. This work provides a simple, and cost effective route for the preparation of an effective hole extraction layer.