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High throughput fabrication of mesoporous carbon perovskite solar cells

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      Abstract

      Near infrared sintering in less than 25 seconds for enhanced commercial viability of screen printed perovskite solar cells.

      Abstract

      The screen printed mesoporous carbon perovskite solar cell has great potential for commercialisation due to its scalable deposition processes and use of inexpensive materials. However, each layer requires long high temperature heating steps to achieve the necessary sintering and porosity, which is very time and energy intensive for large scale production. Near infrared processing is demonstrated here to reduce the heating time of mesoporous layers within a fully printed lead halide perovskite solar cell from 2 hours to 30 seconds. A stabilised efficiency of 11% was achieved by processing in 30 seconds, identical to that of devices heated in 2 hours. For the first time the effect of residual binder in the carbon electrode on the electron lifetime and charge transfer within devices has been investigated. Furthermore cross section EDX mapping of perovskite infiltration provides a greater understanding into the processing requirements of these devices vital to enable commercialisation.

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      Most cited references 27

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      Organometal halide perovskites as visible-light sensitizers for photovoltaic cells.

      Two organolead halide perovskite nanocrystals, CH(3)NH(3)PbBr(3) and CH(3)NH(3)PbI(3), were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells. When self-assembled on mesoporous TiO(2) films, the nanocrystalline perovskites exhibit strong band-gap absorptions as semiconductors. The CH(3)NH(3)PbI(3)-based photocell with spectral sensitivity of up to 800 nm yielded a solar energy conversion efficiency of 3.8%. The CH(3)NH(3)PbBr(3)-based cell showed a high photovoltage of 0.96 V with an external quantum conversion efficiency of 65%.
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        Efficient hybrid solar cells based on meso-superstructured organometal halide perovskites.

        The energy costs associated with separating tightly bound excitons (photoinduced electron-hole pairs) and extracting free charges from highly disordered low-mobility networks represent fundamental losses for many low-cost photovoltaic technologies. We report a low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight. This "meso-superstructured solar cell" exhibits exceptionally few fundamental energy losses; it can generate open-circuit photovoltages of more than 1.1 volts, despite the relatively narrow absorber band gap of 1.55 electron volts. The functionality arises from the use of mesoporous alumina as an inert scaffold that structures the absorber and forces electrons to reside in and be transported through the perovskite.
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          The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms

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            Author and article information

            Affiliations
            [1 ]Swansea University Bay Campus
            [2 ]Swansea
            [3 ]UK
            [4 ]CINVESTAV
            [5 ]97310 Mérida
            [6 ]Mexico
            Journal
            JMCAET
            Journal of Materials Chemistry A
            J. Mater. Chem. A
            Royal Society of Chemistry (RSC)
            2050-7488
            2050-7496
            2017
            2017
            : 5
            : 35
            : 18643-18650
            10.1039/C7TA05674E
            © 2017
            Product
            Self URI (article page): http://xlink.rsc.org/?DOI=C7TA05674E

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