Diketopyrrolopyrrole (DPP) functionalized tetrathienothiophene (TTA) small molecules for organic thin film transistors and photovoltaic cells

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题名:	Diketopyrrolopyrrole (DPP) functionalized tetrathienothiophene (TTA) small molecules for organic thin film transistors and photovoltaic cells
作者:	陳銘洲;Zhou, Nanjia;Vegiraju, Sureshraju;Yu, Xinge;Manley, Eric F;Butler, Melanie R;Leonardi, Matthew J;Guo, Peijun;Zhao, Wei;Hu, Yan;Prabakaran, Kumaresan;Chang, Robert P. H;Ratner, Mark A;Chen, Lin X;Facchetti, Antonio;Chen, Ming-Chou;Marks, Tobin J
贡献者:	理學院化學學系
日期:	2015-07-31
上传时间:	2026-04-21 14:37:29 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Two novel π-conjugated small molecules based on the electron-deficient diketopyrrolopyrrole (DPP) and the electron-rich fused tetrathienoacene (TTA) frameworks are synthesized and characterized. As verified in the bandgap compression of these chromophores by electrochemistry and density functional theory (DFT) computation, these DPP-TAA derivatives exhibit substantial conjugation and ideal MO energetics for light absorption. The large fused TTA core and strong intermolecular S S interactions enforce excellent molecular planarity, favoring a close-packed thin film morphologies for efficient charge transport, as indicated by grazing incidence wide angle X-ray scattering (GIWAXS), atomic force microscopy (AFM), and transmission electron microscopy (TEM) analysis. Top-gate/bottom-contact thin film transistors based on these systems exhibit hole mobilities approaching 0.1 cm 2 V −1 s −1 . Organic photovoltaic cells based on DDPP-TTAR :PC 71 BM blends achieve power conversion efficiencies (PCE) > 4% by systematic morphology tuning and judicious solvent additive selection. Diketopyrrolopyrrole (DPP) end capped tetrathienoacene (TTA) small molecules approaching the hole mobility 0.1 cm 2 V −1 s −1 in OFET and efficiency >4% in OPV. 出版日期： 2015-08-20 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7526 識別號： EISSN: 2050-7534 識別號： DOI: 10.1039/c5tc01348h
显示于类别:	[化學學系] 期刊論文

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