Abstract
Buckminsterfullerene, C60-based planar heterojunction (PHJ) organic photovoltaics (OPVs) have been created using a short wavelength absorption (λmax=490nm) electron-donating bis(naphthylphenylaminophenyl)fumaronitrile (NPAFN). NPAFN exhibits a hole mobility greater than 0.07cm2V−1s−1 as determined by its field-effect transistor. It can be attributed to such hole mobility that enables a thin layer (<10nm) NPAFN in PHJ OPV, ITO/NPAFN/C60/bathocuproine/Al. Because of the low lying HOMO energy level (5.75eV) of NPAFN and relatively high ionization potential ITO (∼5.58eV), such OPVs exhibit a very high open circuit voltage of ∼1.0V, relatively high fill factor of 0.60, and a relatively high shunt resistance of 1100Ωcm−2, which all compensate for a relatively low short circuit current of 3.15mAcm−2 due to the short absorption wavelength and inferred short exciton diffusion length of NPAFN. Altogether, NPAFN OPVs display a power conversion efficiency (ηPC) of 2.22%, which is better than other long wavelength absorption materials in similar PHJ OPVs, such as pentacene (λmax 670nm, HOMO 5.12eV, ηPC 1.50%) and copper phthalocyanine (λmax 624, 695nm, HOMO 5.17eV, ηPC 1.43%).
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.
