Abstract
We demonstrate a technique for determining the charge collection efficiency (ηCC) in bulk heterojunction organic photovoltaic cells (OPVs). To extract ηCC, we describe an approach to measure the optical absorption efficiency by examining the external quantum efficiency under reverse bias. Using estimates of the exciton diffusion efficiency obtained from photoluminescence quenching measurements, ηCC is calculated without any input from optical field simulations. For bulk heterojunction OPVs based on the donor-acceptor pairing of boron subphthalocyanine chloride and C60, a peak ηCC of (79 ± 2)% is realized for films containing 80 wt. % C60 under short-circuit conditions. This optimum composition also coincides with a peak in the fill factor and the short-circuit current density.
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.
