Start
Feb 20, 2014 - 17:00
End
Feb 20, 2014 - 18:00
Venue
Room 118 Creativity Hall Chemical Engineering
Event Type
Speaker
Dr. Sandeep Pathak Postdoctoral Fellow University of Oxford UK
Title
Perovskite Solar Cell: performance Stability and Future prospects
Abstract: The energy costs associated with separating tightly bound excitons (photoinduced electron-hole pairs) and extracting free charges from highly disordered low-mobility networks represent fundamental losses for many low-cost photovoltaic technologies. We report a low-cost solution-processable solar cell based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity that has a power conversion efficiency of 15% in a single-junction device under simulated full sunlight. This “meso-superstructured solar cell” exhibits exceptionally few fundamental energy losses; it can generate open-circuit photovoltages of more than 1.1 volts despite the relatively narrow absorber band gap of 1.55 electron volts. Stability of this device system is encouraging and it can emerge as a challenger to the established solar technology in long run