Abstract
The insertion of a ZnO optical spacer between the active layer and the cathode significantly improves the power conversion efficiency of the PDTS-DTffBT:PC71BM-based polymer solar cell up to 5.5%, which is 48% higher than the control device. The functionality of the ZnO optical spacer is embodied from a variety of aspects. First, the AFM image shows that it can optimize the surface morphology of the active layer, leading to a better contact with the cathode and lower interfacial energy barrier for the electron extraction. Second, the normal incident reflection spectra and the external quantum efficiency curve indicate that the optical field distribution is effectively modulated such that the light harvesting capability is improved. Third, the analysis of the saturated photocurrent reveals the increase for both the generation efficiency of free charges and the dissociation probability of the exciton. Finally, the dark current voltage measurement demonstrates that the local leakage current is suppressed, an...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
