Acenaphtho[1, 2‐k]fluoranthene‐Fused Diimide Derivatives: An Investigation of the Relationship Between Molecular Structure and Device Performance. Issue 9 (28th June 2017)

• Record Type: Journal Article
• Authors: Ding, Lin; Yang, Chi‐Yuan; Zheng, Yu‐Qing; Wang, Jie‐Yu; Pei, Jian; Su, Zhongmin
• Is Part Of: Asian journal of organic chemistry. Volume 6:Issue 9(2017)
• Page Start: 1231
• Page End: 1234
• Publication Date: 2017-06-28
• Subjects: density functional calculations -- electron-deficient compounds -- energy conversion -- inverted solar cells -- LUMO; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; 547.005
• DOI: 10.1002/ajoc.201700203
• Languages: English
• ISSNs: 2193-5807

Abstract

Abstract: Organic electron‐acceptor materials play an important role in organic electronics, especially in organic bulk heterojunction (BHJ) solar cells. Recently, many non‐fullerene small molecular acceptors have been developed, in which aromatic fused‐imides were proven to be a promising family of excellent electron acceptors. We developed a series of acenaphtho[1, 2‐ k ]fluoranthene‐fused diimides, AFIs (AFI1, AFI2 andAFI3 ), employing the Diels–Alder reaction as the crucial synthetic step. With electron‐withdrawing diimide groups in their large conjugated backbone, AFIs display a LUMO level around −3.50 eV. TheseAFI compounds were used as the electron acceptors to fabricate organic photovoltaic devices. The power conversion efficiency (PCE) of up to 2.37 % was achieved with a high open‐circuit voltage ( V oc ) up to 0.96 V. Abstract : Just accept it ! A series of electron‐acceptor acenaphtho fluoranthene‐fused diimide (AFI ) derivatives were designed and synthesized. ThreeAFI derivatives were functionalized with different alkyl chains. Large aromatic backbones ofAFI derivatives endow them with low LUMO levels, down to −3.5 eV. Among them, AFI3, bearing branched alkyl chains on imide groups and linear alkyl chains on flanked phenyl groups, showed the highest power conversion efficiency of 2.37 %, much higher than those molecules having linear alkyl chains.