title: Colloidally prepared La-doped BaSnO3electrodes for efficient, photostable perovskite solar cells.
abstract: Perovskite solar cells (PSCs) exceeding a power conversion efficiency (PCE) of 20% have mainly been demonstrated by using mesoporous titanium dioxide (mp-TiO2) as an electron-transporting layer. However, TiO2can reduce the stability of PSCs under illumination (including ultraviolet light). Lanthanum (La)-doped BaSnO3(LBSO) perovskite would be an ideal replacement given its electron mobility and electronic structure, but LBSO cannot be synthesized as well-dispersible fine particles or crystallized below 500°C. We report a superoxide colloidal solution route for preparing a LBSO electrode under very mild conditions (below 300°C). The PSCs fabricated with LBSO and methylammonium lead iodide (MAPbI3) show a steady-state power conversion efficiency of 21.2%, versus 19.7% for a mp-TiO2device. The LBSO-based PSCs could retain 93% of their initial performance after 1000 hours of full-Sun illumination.
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea.|Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
authors.forename: Seong Sik
authors.identifier: 0000-0002-0525-4160
authors.initials: SS
authors.lastname: Shin
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea.
authors.forename: Eun Joo
authors.identifier: 0000-0001-5692-7145
authors.initials: EJ
authors.lastname: Yeom
authors.affiliation: Perovtronics Research Center, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea.
authors.forename: Woon Seok
authors.initials: WS
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Seyoon
authors.identifier: 0000-0002-3901-8019
authors.initials: S
authors.lastname: Hur
authors.affiliation: Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang 790-784, Republic of Korea.
authors.forename: Min Gyu
authors.initials: MG
authors.lastname: Kim
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea.
authors.forename: Jino
authors.initials: J
authors.lastname: Im
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea.
authors.forename: Jangwon
authors.initials: J
authors.lastname: Seo
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea. seoksi@unist.ac.kr jhnoh@krict.re.kr.|School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea.
authors.forename: Jun Hong
authors.initials: JH
authors.lastname: Noh
authors.affiliation: Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea. seoksi@unist.ac.kr jhnoh@krict.re.kr.|Perovtronics Research Center, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 44919, Republic of Korea.
authors.forename: Sang Il
authors.identifier: 0000-0001-9976-6628
authors.initials: SI
authors.lastname: Seok