Abstract
The highest occupied molecular orbital (HOMO) level of hole-transporting polymeric materials was tuned by postfunctionalization based on a highly-efficient [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) reaction. After the CA-RE reaction, the HOMO level of an aromatic polyamine, determined by the electrochemical first oxidation potential, was lowered from −5.30 eV to −5.37 eV. This enabled the smooth hole injection from the perovskite layer of organic-inorganic perovskite solar cells. Although the hole mobility of the aromatic polyamine, determined by the space-charge limited current (SCLC) method, decreased by this postfunctionalization, the energy level adjustment was more significant for the improvement of the solar cell performances. The device based on the postfunctionalized polyamine with the HOMO level of −5.37 eV showed more than twice the photoconversion efficiency than that based on the precursor polyamine with the HOMO level of −5.30 eV.
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.
