30
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Colloidally prepared La-doped BaSnO3 electrodes for efficient, photostable perovskite solar cells.

      Read this article at

      ScienceOpenPublisherPubMed
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          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, TiO2 can 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-TiO2 device. The LBSO-based PSCs could retain 93% of their initial performance after 1000 hours of full-Sun illumination.

          Related collections

          Most cited references27

          • Record: found
          • Abstract: found
          • Article: not found

          Efficient and stable large-area perovskite solar cells with inorganic charge extraction layers.

          The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction, even with 10- to 20-nanometer-thick layers, avoiding pinholes and eliminating local structural defects over large areas. The robust inorganic nature of the layers allowed for the fabrication of PSCs with an aperture area >1 square centimeter that have a PCE >15%, as certified by an accredited photovoltaic calibration laboratory. Hysteresis in the current-voltage characteristics was eliminated; the PSCs were stable, with >90% of the initial PCE remaining after 1000 hours of light soaking.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Improving efficiency and stability of perovskite solar cells with photocurable fluoropolymers

            Organometal halide perovskite solar cells have demonstrated high conversion efficiency but poor long-term stability against ultraviolet irradiation and water. We show that rapid light-induced free-radical polymerization at ambient temperature produces multifunctional fluorinated photopolymer coatings that confer luminescent and easy-cleaning features on the front side of the devices, while concurrently forming a strongly hydrophobic barrier toward environmental moisture on the back contact side. The luminescent photopolymers re-emit ultraviolet light in the visible range, boosting perovskite solar cells efficiency to nearly 19% under standard illumination. Coated devices reproducibly retain their full functional performance during prolonged operation, even after a series of severe aging tests carried out for more than 6 months.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Enhanced UV-light stability of planar heterojunction perovskite solar cells with caesium bromide interface modification

                Bookmark

                Author and article information

                Journal
                Science
                Science (New York, N.Y.)
                American Association for the Advancement of Science (AAAS)
                1095-9203
                0036-8075
                April 14 2017
                : 356
                : 6334
                Affiliations
                [1 ] Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-Ro, Yuseong-Gu, Daejeon 34114, Republic of Korea.
                [2 ] Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
                [3 ] 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.
                [4 ] Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
                [5 ] Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang 790-784, Republic of Korea.
                [6 ] 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.
                [7 ] School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea.
                Article
                science.aam6620
                10.1126/science.aam6620
                28360134
                d07f9a9f-9de1-4c2a-a316-d58b2bd5392f
                History

                Comments

                Comment on this article