title: D-A-π-A Motif Quinoxaline-Based Sensitizers with High Molar Extinction Coefficient for Quasi-Solid-State Dye-Sensitized Solar Cells.
abstract: To meet the requirement of high molar extinction coefficient, broad absorption spectrum, and photo/thermal stability for sensitizers of quasi-solid-state dye-sensitized solar cells (Qs-DSSCs) with reduced film thickness, a novel D-A-π-A configuration organic sensitizer IQ22 was specifically designed, in which the conjugation bridge of cyclopentadithiophene (CPDT) unit was incorporated to widen the light response and enhance molar coefficients for increasing the short-circuit current density (JSC), and the octane chain on CPDT was targeted for suppressing the charge recombination and improving the open-circuit voltage (VOC). As a result, the Qs-DSSC based on IQ22 exhibits very promising conversion efficiency as high as 8.76%, with a JSCof 18.19 mA cm-2, a VOCof 715 mV, and a fill factor (FF) of 0.67 under AM 1.5 illumination (100 mW cm-2), standing out in the Qs-DSSCs utilizing metal-free organic sensitizers.
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Yu
authors: Y
authors: Wang
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Zhiwei
authors: Z
authors: Zheng
authors: EaStCHEM School of Chemistry, University of Edinburgh , Kings Buildings, Edinburgh EH9 3FJ, United Kingdom.
authors: Tianyue
authors: T
authors: Li
authors: EaStCHEM School of Chemistry, University of Edinburgh , Kings Buildings, Edinburgh EH9 3FJ, United Kingdom.
authors: Neil
authors: N
authors: Robertson
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Huaide
authors: H
authors: Xiang
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.|EaStCHEM School of Chemistry, University of Edinburgh , Kings Buildings, Edinburgh EH9 3FJ, United Kingdom.
authors: Wenjun
authors: W
authors: Wu
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Jianli
authors: J
authors: Hua
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: Wei-Hong
authors: WH
authors: Zhu
authors: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
authors: He
authors: H
authors: Tian
keywords: auxiliary acceptors; dye-sensitized solar cells; quasi-solid-state; quinoxaline; sensitizer