title: Effect of ZnO:Cs2CO3 on the performance of organic photovoltaics.
abstract: We demonstrate a new solution-processed electron transport layer (ETL), zinc oxide doped with cesium carbonate (ZnO:Cs2CO3), for achieving organic photovoltaics (OPVs) with good operational stability at ambient air. An OPV employing the ZnO:Cs2CO3 ETL exhibits a fill factor of 62%, an open circuit voltage of 0.90 V, and a short circuit current density of -6.14 mA/cm(2) along with 3.43% power conversion efficiency. The device demonstrated air stability for a period over 4 weeks. In addition, we also studied the device structure dependence on the performance of organic photovoltaics. Thus, we conclude that ZnO:Cs2CO3 ETL could be employed in a suitable architecture to achieve high-performance OPV.
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Hyeong Pil
authors.initials: HP
authors.lastname: Kim
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Abd Rashid Bin Mohd
authors.initials: AR
authors.lastname: Yusoff
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Hee Jae
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Seung Joo
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Hyo Min
authors.initials: HM
authors.lastname: Kim
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Gi Jun
authors.initials: GJ
authors.lastname: Seo
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Jun Ho
authors.initials: JH
authors.lastname: Youn
authors.affiliation: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Dongdaemun-ku, Seoul 130-171, Republic of Korea.
authors.forename: Jin
authors.initials: J
authors.lastname: Jang
keywords: Cs2CO3; Inverted structure; PEDOT; PSS; Polymer solar cells; ZnO