title: Boosting the power conversion efficiency of perovskite solar cells using self-organized polymeric hole extraction layers with high work function.
abstract: A self-organized hole extraction layer (SOHEL) with high work function (WF) is designed for energy level alignment with the ionization potential level of CH3 NH3 PbI3 . The SOHEL increases the built-in potential, photocurrent, and power conversion efficiency (PCE) of CH3 NH3 PbI3 perovskite solar cells. Thus, interface engineering of the positive electrode of solution-processed planar heterojunction solar cells using a high-WF SOHEL is a very effective way to achieve high device efficiency (PCE = 11.7% on glass).
authors.affiliation: Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Nam-gu, Pohang, Gyungbuk, 790-784, Republic of Korea.
authors.forename: Kyung-Geun
authors.initials: KG
authors.lastname: Lim
authors.forename: Hak-Beom
authors.initials: HB
authors.lastname: Kim
authors.forename: Jaeki
authors.initials: J
authors.lastname: Jeong
authors.forename: Hobeom
authors.initials: H
authors.lastname: Kim
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Tae-Woo
authors.initials: TW
authors.lastname: Lee
keywords: PEDOT:PSS; hole extraction layers; perovskite solar cells; perovskites; self-organized; solar cells