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- W3206820144 abstract "It is crucial to minimize the absorption overlap between donor and acceptor for high-efficiency all-small-molecule organic solar cells with high current densities. Considering strong absorption of nonfullerene acceptors 2,2.-((2Z,2?Z)-((4,4,9,9-tetrah exyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b.]dithiophene-2,7-diyl)bis (methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IDIC) in the ranges of 650–750 nm, two porphyrin unit-based small molecules containing diketopyrrolopyrrole groups (Dipor and Por) are selected as the electron donor materials because of their weak absorption in this region. Porphyrin dimer Dipor displays a broad photon response from 300 to 1000 nm in the films and its absorption deficiency between the Soret and <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>Q</i> -bands could be perfectly compensated by nonfullerene acceptors IDIC, while monomer Por shows partial overlapping absorption to IDIC in ranges of 650–700 nm and its absorption edge locates at ∼900 nm. The higher compatibility of porphyrin dimer Dipor and IDIC results in a promising power conversion efficiency of 8.3% with a high short-circuit current density ( <italic xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>J<sub>sc</sub></i> ) of 20.2 mA cm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>−2</sup> , whereas the devices based on Por: IDIC show a lower power conversion efficiency of 6.3%." @default.
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- W3206820144 date "2022-01-01" @default.
- W3206820144 modified "2023-10-11" @default.
- W3206820144 title "Porphyrin-Based All-Small-Molecule Organic Solar Cells With Absorption-Complementary Nonfullerene Acceptor" @default.
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- W3206820144 doi "https://doi.org/10.1109/jphotov.2021.3114597" @default.
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