Advanced Energy Material, 2014, 1400680
Graphical abstract: Two pairs of indacenodithiophene (IDT) and quinoxaline based copolymers with meta- or para-hexyl-phenyl side chains on the IDT unit are synthesized. The meta-substituted polymers offer better solubility, higher molecular weight for both fluorinated and non-fluorinated copolymers, and a superior photovoltaic performance with a power conversion efficiency of 7.8% was obtained. The side-chaindesign strategy disclosed here is an efficient way for high performance conjugated polymers for organic electronics.
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Journal of Materials Chemistry A 2015, 3, 886-893
Graphical abstract: A new triangular-spiral small molecule of TPA(DPP-PN)3 was obtained on the basis of the TPA-3DPP counterpart by pending planar phenanthrene units into the molecular terminals, which displayed an enhanced light-harvesting ability and improved hole mobility. Its organic solar cells further exhibited an improved photovoltaic performance with the best power conversion efficiency of 3.67% and a maximum short-circuit current density of 8.95 mA cm-2, which are 1.9 and 1.5 times higher than those of the TPA-3DPP-based cells.
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Journal of Materials Chemistry A 2015,3, 13568-13576
Graphical abstract: Better photovoltaic performance with the improvement of short-circuit current density, open-circuit voltage and fill factor simultaneously was achieved by tuning the moiety sequence of their arms in star-shaped molecules, leading to the maximum power conversion efficiency (PCE) up to 5.07%.
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Chemical Communication, 2013, 49, 9335-9337
Graphical abstract: Enhanced photovoltaic performance with a PCE value up to 6.32% was achieved by fluorine substitution in a D-A1-D-A2 copolymer.
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Polymer Chemistry, 2015, 6, 4290-4298
Graphical abstract: To investigate the influence of side chains of quinoxaline on the photovoltaic performances, a novel D–A-type polymer of PBDTDT(Qx-3)-T was synthesized and characterized, in which BDT-T, T and Qx-3 were used as the donor (D) unit, π-bridge and acceptor (A) unit, respectively.
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Macromolecules 2013, 46, 113–118
Graphical abstract: A novel conjugated polymer of PBDT-TDPP-S was synthesized, which contains a donor unit of benzo[1,2-b:4,5-b′]dithiophene in main chain and an acceptor unit of diketopyrrolopyrrole in side chain. This kind of side-chain donor–acceptor (D–A) polymer exhibited better solution processability, lower HOMO level (−5.34 eV), and more balanced carrier mobility relative to its corresponding main-chain D–A conjugated polymers. Using PBDT-TDPP-S as electron donor and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptor, the resulting polymer solar cells exhibited outstanding photovoltaic properties with a power conversion efficiency of 4.89%, an open-circuit voltage of 0.84 V, a short-circuit current of 10.04 mA cm–2, and a fill factor of 56.0%.
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Macromolecules 2015, 48, 1009-1016
Graphical abstract: Typically a donor–acceptor (D–A) design strategy is used for engineering the bandgap of polymers for solar cells. However, in this work, a series of alternating D–A1–D–A2 copolymers PnTQTI(F) were synthesized and characterized with oligothiophenes (nT, n= 1, 2, 3) as the donor and two electron-deficient moieties, quinoxaline and isoindigo, as the acceptors in the repeating unit. A superior photovoltaic performance was observed for the P3TQTI-F-based device with a power conversion efficiency (PCE) of 7.0%, which is the highest efficiency for alternating D–A1–D–A2 polymers reported to date.
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Journal of Materials Chemistry C 2015, 3, 6240-6248
Graphical abstract: in this study, three novel D–A-type terpolymers of PBDTT–PPzBT–H, PBDTT–PPzBT–F and PBDTT–PPzBT–O were synthesized by copolymerizing electron-rich BDTT and two electron-deficient PPz and BT units.
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Journal of Materials Chemistry A 2016, 4, 18792-18803
Graphical abstract: A novel vertical carboxylate functionalized benzodithiophene V-BDTC unit was designed as an election-accepting block to build D-A type copolymers. Two wide band gap polymers of PV-BDTC1and PV-BDTC2 were prepared with V-BDTC unit. A high Voc of 1.03 V and a significant PCE of 7.49% were achieved based on this kind of polymers.
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Journal of Materials Chemistry C 2016, 4, 6007-6015
Graphical abstract: Two novel dinuclear platinum complexes containing aryl-isoquinoline and oxadiazole-thiol ligands are synthesized and characterized. The Pt-Pt bond is confirmed by the (piq)2Pt2(µ-PhOXT)2 single crystal. High-efficiency NIR electroluminescence peaked about 704 nm is observed for the (niq)2Pt2(µ-C8PhOXT)2 in the solution-processed PLEDs with a notable external quantum efficiency (EQE) of 8.86% and an irradiate of 986 µWcm-2 at 9 wt% dopant concentration.
Advanced Energy Material, 2014, 1400680
Graphical abstract: Two pairs of indacenodithiophene (IDT) and quinoxaline based copolymers with meta- or para-hexyl-phenyl side chains on the IDT unit are synthesized. The meta-substituted polymers offer better solubility, higher molecular weight for both fluorinated and non-fluorinated copolymers, and a superior photovoltaic performance with a power conversion efficiency of 7.8% was obtained. The side-chaindesign strategy disclosed here is an efficient way for high performance conjugated polymers for organic electronics.
———————————————————————————————————————————————
Journal of Materials Chemistry A 2015, 3, 886-893
Graphical abstract: A new triangular-spiral small molecule of TPA(DPP-PN)3 was obtained on the basis of the TPA-3DPP counterpart by pending planar phenanthrene units into the molecular terminals, which displayed an enhanced light-harvesting ability and improved hole mobility. Its organic solar cells further exhibited an improved photovoltaic performance with the best power conversion efficiency of 3.67% and a maximum short-circuit current density of 8.95 mA cm-2, which are 1.9 and 1.5 times higher than those of the TPA-3DPP-based cells.
———————————————————————————————————————————————
Journal of Materials Chemistry A 2015,3, 13568-13576
Graphical abstract: Better photovoltaic performance with the improvement of short-circuit current density, open-circuit voltage and fill factor simultaneously was achieved by tuning the moiety sequence of their arms in star-shaped molecules, leading to the maximum power conversion efficiency (PCE) up to 5.07%.
Chemical Communication, 2013, 49, 9335-9337
Graphical abstract: Enhanced photovoltaic performance with a PCE value up to 6.32% was achieved by fluorine substitution in a D-A1-D-A2 copolymer.
———————————————————————————————————————————————
Polymer Chemistry, 2015, 6, 4290-4298
Graphical abstract: To investigate the influence of side chains of quinoxaline on the photovoltaic performances, a novel D–A-type polymer of PBDTDT(Qx-3)-T was synthesized and characterized, in which BDT-T, T and Qx-3 were used as the donor (D) unit, π-bridge and acceptor (A) unit, respectively.
———————————————————————————————————————————————
Macromolecules 2013, 46, 113–118
Graphical abstract: A novel conjugated polymer of PBDT-TDPP-S was synthesized, which contains a donor unit of benzo[1,2-b:4,5-b′]dithiophene in main chain and an acceptor unit of diketopyrrolopyrrole in side chain. This kind of side-chain donor–acceptor (D–A) polymer exhibited better solution processability, lower HOMO level (−5.34 eV), and more balanced carrier mobility relative to its corresponding main-chain D–A conjugated polymers. Using PBDT-TDPP-S as electron donor and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as electron acceptor, the resulting polymer solar cells exhibited outstanding photovoltaic properties with a power conversion efficiency of 4.89%, an open-circuit voltage of 0.84 V, a short-circuit current of 10.04 mA cm–2, and a fill factor of 56.0%.
———————————————————————————————————————————————
Macromolecules 2015, 48, 1009-1016
Graphical abstract: Typically a donor–acceptor (D–A) design strategy is used for engineering the bandgap of polymers for solar cells. However, in this work, a series of alternating D–A1–D–A2 copolymers PnTQTI(F) were synthesized and characterized with oligothiophenes (nT, n= 1, 2, 3) as the donor and two electron-deficient moieties, quinoxaline and isoindigo, as the acceptors in the repeating unit. A superior photovoltaic performance was observed for the P3TQTI-F-based device with a power conversion efficiency (PCE) of 7.0%, which is the highest efficiency for alternating D–A1–D–A2 polymers reported to date.
———————————————————————————————————————————————
Journal of Materials Chemistry C 2015, 3, 6240-6248
Graphical abstract: in this study, three novel D–A-type terpolymers of PBDTT–PPzBT–H, PBDTT–PPzBT–F and PBDTT–PPzBT–O were synthesized by copolymerizing electron-rich BDTT and two electron-deficient PPz and BT units.
———————————————————————————————————————————————
Journal of Materials Chemistry A 2016, 4, 18792-18803
Graphical abstract: A novel vertical carboxylate functionalized benzodithiophene V-BDTC unit was designed as an election-accepting block to build D-A type copolymers. Two wide band gap polymers of PV-BDTC1and PV-BDTC2 were prepared with V-BDTC unit. A high Voc of 1.03 V and a significant PCE of 7.49% were achieved based on this kind of polymers.
———————————————————————————————————————————————
Journal of Materials Chemistry C 2016, 4, 6007-6015
Graphical abstract: Two novel dinuclear platinum complexes containing aryl-isoquinoline and oxadiazole-thiol ligands are synthesized and characterized. The Pt-Pt bond is confirmed by the (piq)2Pt2(µ-PhOXT)2 single crystal. High-efficiency NIR electroluminescence peaked about 704 nm is observed for the (niq)2Pt2(µ-C8PhOXT)2 in the solution-processed PLEDs with a notable external quantum efficiency (EQE) of 8.86% and an irradiate of 986 µWcm-2 at 9 wt% dopant concentration.