Abstract
The thermally deposited thin methylammonium iodide (MAI) interlayer worked as protection layer of poly (3, 4-ethylenedioxythiophene) poly (styrene sulfonate) (PEDOT:PSS) in the thermal deposition of lead iodide (PbI 2 ). And the thin MAI interlayer could be the MAI supplemental layer during converting the thermally deposited PbI 2 into perovskite. The performances of perovskite solar cells (SCs) converted from thermally deposited PbI 2 were remarkably enhanced by using the thin MAI interlayer on PEDOT:PSS. The short-circuit current density (J SC ), fill factor (FF%), and conversion efficiency (η%) of perovskite SCs converted from thermally deposited PbI 2 increased with the initial increase in thickness of the thin MAI interlayer and then reduced when the thickness of thin MAI interlayer exceeded 2.2 nm. Perovskite SCs converted from thermally deposited PbI 2 with a 2.2 nm-thick thin MAI interlayer obtained the largest J SC , FF%, and η% at 19.44 mA/cm 2 , 74% and 12.75%, respectively, in our study. And the largest J SC was more than twice larger than that of perovskite SCs converted from thermally deposited PbI 2 without thin MAI interlayer. Although the perovskite SCs converted from thermally deposited PbI 2 without thin MAI interlayer has η% much less than that of perovskite SCs converted from spin-coated PbI 2 . The perovskite SCs converted from thermally deposited PbI 2 with 2.2 nm-thick thin MAI interlayer had an η% of 12.75%, which was larger than that of perovskite SCs converted from spin-coated PbI 2 at 10.57%. • The thermally deposited thin MAI interlayer is a supplement of MAI for converting thermally deposited PbI 2 to perovskite. • The thermally deposited thin MAI interlayer is also a protection layer of PEDOT:PSS during the thermal deposition of PbI 2 . • The thin MAI interlayer leads great improvements on properties and performances of perovskite SCs.
Published Version
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 call