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Electrode Transport Layer-Metal Electrode Interface Morphology Tailoring for Enhancing the Performance of Perovskite Solar Cells

Nath, B and Ramamurthy, PC and Mahapatra, DR and Hegde, G (2022) Electrode Transport Layer-Metal Electrode Interface Morphology Tailoring for Enhancing the Performance of Perovskite Solar Cells. In: ACS Applied Electronic Materials, 4 (2). pp. 689-697.

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Official URL: https://doi.org/10.1021/acsaelm.1c01100


In the field of photovoltaics, methylammonium lead iodide (MAPbI3) is the most emerging light absorber material because of its excellent optoelectronic properties. Perovskite solar cells with P-I-N device architecture were fabricated with thermally evaporated metal electrodes from different sources like silver nanoparticles and bulk silver shots. Film topography, surface morphology, structure, and grain size were observed using various characterization techniques. Top electrodes with better roughness matching with the transport layer were obtained by thermal evaporation of metal nanopowder. Various electrical characterization techniques, including current density (J) vs voltage (V) and capacitance measurements, were carried out under light and dark conditions for investigating the device performance. Devices with electrodes thermally evaporated using nanopowder showed enhancement in device performance with a lower series resistance and a higher shunt resistance, as observed from J-V characteristics. An open-circuit voltage improvement of ∼14% and a power conversion efficiency enhancement of ∼13% have been observed. A considerable improvement in contact resistances has also been noted. The idea about the recombination of devices can be obtained from J-V measurements with varying illumination intensities. The higher carrier concentration in the device based on a Ag NP electrode can be related to the contribution of the less recombination because of the reduced number of traps. These findings support the purpose of using metal nanopowder instead of the bulk form of metals for thermally evaporated top electrodes in perovskite solar cells.

Item Type: Journal Article
Publication: ACS Applied Electronic Materials
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to the American Chemical Society.
Keywords: Capacitance; Carrier concentration; Contact resistance; Electrodes; Layered semiconductors; Lead compounds; Metal nanoparticles; Metals; Open circuit voltage; Organic solar cells; Perovskite; Silver compounds; Silver nanoparticles; Topography, Characterization techniques; Device performance; Electrode interface; Electrode morphology; Interface morphologies; Metal electrodes; Metal nanopowder; Optoelectronic measurements; Performance; Transport layers, Perovskite solar cells
Department/Centre: Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 21 Jun 2022 05:34
Last Modified: 21 Jun 2022 05:34
URI: https://eprints.iisc.ac.in/id/eprint/73849

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