Abstract
A novel crosslinkable aminoalkyl‐functionalized polymer, poly[9,9‐bis(6‐(N,N‐diethylamino)propyl)fluorene‐alt‐9,9‐bis(hex‐5‐en‐1‐yl)‐fluorene] (PFN‐V), is designed and synthesized. The resulting polymer can be rapidly crosslinked by UV‐curing within 5 s in a nearly quantitative yield based on the “click” chemistry of alkyene end‐groups of the PFN‐V side chains and the addition of 1,8‐octanedithiol. The crosslinked PFN‐V film exhibits excellent solvent resistance property and can act as effective cathode interlayer to modify the indium tin oxide (ITO) electrode, which can thus facilitate the formation of Ohmic contact between cathode and active layer. The surface energy of PFN‐V is quite comparable to that of PC71BM, which is favorable for the formation of vertical phase separation in the bulk heterojunction film that can facilitate extraction of charges as verified by transient photocurrent measurements. Based on the resulting PFN‐V as the cathode interlayer, the fabricated polymer solar cells with inverted device structure show a remarkable enhancement of power conversion efficiency from 3.11% for the control device to 9.18% for PFN‐V based device. These observations indicate that the synthesized PFN‐V can be a promising crosslinked copolymer as the cathode interlayer for high performance polymer solar cells.
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.
