Researchers in South Korea have used the process to increase performance and the replicability of large-area organic cells. The method was used during film formation to speed up solvent evaporation.<\/p>\n\n\n\n

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Researchers from the Photo-electronic Hybrids Research Center at the Korea Institute of Science and Technology (KIST) have applied spin coating <\/a>to the manufacture of large-area organic PV cells<\/a>.<\/p>\n\n\n\n

Low-cost spin coating applies a uniform film onto a solid surface using centrifugal force and a liquid-vapor interface. It is used in organic PV research during film formation to speed up solvent evaporation.<\/p>\n\n\n\n

The researchers said spin coating enables bulk-heterojunction (BHJ) films for large-area organic cells which perform better and are more replicable than films produced without the process. \u201cCommercially-available organic materials become easily crystallized, which makes them unsuitable for large-area solution processes,\u201d the KIST group explained.<\/p>\n\n\n\n

The solar cell developed by the researchers is based on PBDB-T, a polymer donor semiconductor material used in highly-efficient OPV [organic PV] devices and ITIC, an n-type acceptor which provides good alignment with low band-gap polymers for enhanced charge separation efficiency and reduced energy loss. \u201cSuch aggregated morphology of PBDB-T:ITIC is much improved, to optimal morphology for effective charge generation and transporting with a 50 degrees Celsius heating process,\u201d the scientists said.<\/p>\n\n\n\n

The KIST group said they could control the solvent evaporation rate and that the efficiency of their solar cell was higher than devices of the same kind with a large area. \u201cAs a result, [the] PBDB-T:ITIC photovoltaic module (active area 58.5cm^{2<\/sup>) prepared at 50 degrees Celsius showed much-enhanced efficiency of 9.3% \u2026 5% [more than the] room temperature processed one,\u201d they stated.<\/p>\n\n\n\n}

The cell is described in the paper\u00a0Developement [sic] of highly efficient large area organic photovoltaic module: Effects of nonfullerene acceptor<\/a>, published in\u00a0Nano Energy\u00a0<\/em>and on the ScienceDirect website.<\/p>\n\n\n\n

From: https:\/\/www.pv-magazine.com\/2020\/09\/11\/more-efficient-large-area-organic-solar-cells-with-spin-coating\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Researchers in South Korea have used the process to increase performance and the replicability of large-area organic cells. The method was used during film formation to speed up solvent evaporation. Researchers from the Photo-electronic Hybrids Research Center at the Korea Institute of Science and Technology (KIST) have applied spin coating to the manufacture of large-area organic PV cells.…
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