2019
DOI: 10.1002/aenm.201803976
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Facile Synthesis of Polycyclic Aromatic Hydrocarbon (PAH)–Based Acceptors with Fine‐Tuned Optoelectronic Properties: Toward Efficient Additive‐Free Nonfullerene Organic Solar Cells

Abstract: A series of polycyclic aromatic hydrocarbons (PAHs) with extended π‐conjugated cores (from naphthalene, anthracene, pyrene, to perylene) are incorporated into nonfullerene acceptors for the first time. Four different fused‐ring electron acceptors (FREAs), i.e., DTN‐IC‐2Ph, DTA‐IC‐3Ph, DTP‐IC‐4Ph, and DTPy‐IC‐5Ph, are prepared via simple and facile synthetic procedures, yielding a remarkable platform to study the structure–property relationship for nonfullerene solar cells. With the PAH core being extended syst… Show more

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Cited by 55 publications
(49 citation statements)
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“…firstly introduced a series of polycyclic aromatic hydrocarbons (PAHs) into NFSMAs and developed four acceptors (DTP‐IC‐xPh) through a simple and low‐cost synthetic route. With good solubility, matching energy level and complementary absorption to the acceptor PDBD‐T, the DTP‐IC‐4Ph‐based ( 3.7 ) additive‐free OSCs attained a PCE of 10.37 % with a V OC of 0.900 V, a J SC of 17.32 mA cm −2 and a FF of 66.6 % . It should be noted that the DTP‐IC‐4Ph can be readily accessed from the low‐cost commercial starting material 1,6‐dibromopyrene via Stille coupling reaction, followed by lithiation and ring‐closure reaction.…”
Section: Nfsmas For Additive‐free Oscsmentioning
confidence: 99%
“…firstly introduced a series of polycyclic aromatic hydrocarbons (PAHs) into NFSMAs and developed four acceptors (DTP‐IC‐xPh) through a simple and low‐cost synthetic route. With good solubility, matching energy level and complementary absorption to the acceptor PDBD‐T, the DTP‐IC‐4Ph‐based ( 3.7 ) additive‐free OSCs attained a PCE of 10.37 % with a V OC of 0.900 V, a J SC of 17.32 mA cm −2 and a FF of 66.6 % . It should be noted that the DTP‐IC‐4Ph can be readily accessed from the low‐cost commercial starting material 1,6‐dibromopyrene via Stille coupling reaction, followed by lithiation and ring‐closure reaction.…”
Section: Nfsmas For Additive‐free Oscsmentioning
confidence: 99%
“…Another two NFAs with the pyrene core connecting with end groups via 2,9-positions named Py-1 and Py-2 also exhibited a wide bandgap of 1.95 and 1.97 eV respectively, leading to low J SC and PCE. 33 On the other hand, "DTP-IC-4Ph" (dithieno[f-g,m-n](di(para-hexyl) phenyl)cyclohexapyrene-IC) from Guo et al 34 with the pyrene core connecting with end groups via 1,8-positions presented a notably red-shied absorption spectrum and thus a clearly improved J SC of 17.32 mA cm À2 and PCE of 10.37%. However, the reasons for the red-shied spectra and how the connection position of the pyrene core can inuence the properties of the resulting molecules have not been systematically studied.…”
Section: Introductionmentioning
confidence: 99%
“…Meanwhile, the D core also plays a key role in adjusting the Enormalgopts and energy levels of NFAs. For example, using a strong electron‐donating capacity D core can amplify the intramolecular charge transfer (ICT) effect for a narrow Enormalgopt . However, such a D core also leads to a high HOMO level, which not only astrict the option of donor material but also limit the increase in V oc .…”
Section: Introductionmentioning
confidence: 99%