用于增强染料敏化太阳能电池性能的基于D-D-π-A的有机敏化剂的分子工程

Molecular Engineering of D-D-π-A-Based Organic Sensitizers for Enhanced Dye-Sensitized Solar Cell Performance.

作者信息

Sharmoukh Walid, Cong Jiayan, Gao Jiajia, Liu Peng, Daniel Quentin, Kloo Lars

机构信息

National Research Centre, Inorganic Chemistry Department, Tahrir Street, Dokki, 12622 Giza, Egypt.

Organic Chemistry, Center of Molecular Devices, Department of Chemistry, Chemical Science and Engineering, and Applied Physical Chemistry, Center of Molecular Devices, School of Chemical Science and Engineering, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden.

出版信息

ACS Omega. 2018 Apr 4;3(4):3819-3829. doi: 10.1021/acsomega.8b00271. eCollection 2018 Apr 30.

A series of molecularly engineered and novel dyes WS1, WS2, WS3, and WS4, based on the D35 donor, 1-(4-hexylphenyl)-2,5-di(thiophen-2-yl)-1-pyrrole and 4-(4-hexylphenyl)-4-dithieno[3,2-:2',3'-]pyrrole as π-conjugating linkers, were synthesized and compared to the well-known LEG4 dye. The performance of the dyes was investigated in combination with an electrolyte based on Co(II/III) complexes as redox shuttles. The electron recombination between the redox mediators in the electrolyte and the TiO interface decreases upon the introduction of 4-hexylybenzene entities on the 2,5-di(thiophen-2-yl)-1-pyrrole and 4-dithieno[3,2-:2',3'-]pyrrole linker units, probably because of steric hindrance. The open circuit photovoltage of WS1-, WS2-, WS3-, and WS4-based devices in combination with the Co(II/III)-based electrolyte are consistently higher than those based on a I/I electrolyte by 105, 147, 167, and 75 mV, respectively. The WS3-based devices show the highest power conversion efficiency of 7.4% at AM 1.5 G 100 mW/cm illumination mainly attributable to the high open-circuit voltage ( ).

基于D35供体、1-(4-己基苯基)-2,5-二(噻吩-2-基)-1-吡咯和4-(4-己基苯基)-4-二噻吩并[3,2-:2',3'-]吡咯作为π共轭连接体，合成了一系列分子工程化的新型染料WS1、WS2、WS3和WS4，并与著名的LEG4染料进行了比较。将这些染料与基于Co(II/III)配合物作为氧化还原穿梭体的电解质结合，研究了其性能。在2,5-二(噻吩-2-基)-1-吡咯和4-二噻吩并[3,2-:2',3'-]吡咯连接体单元上引入4-己基苯实体后，电解质中氧化还原介质与TiO界面之间的电子复合减少，这可能是由于空间位阻。基于WS1、WS2、WS3和WS4的器件与基于Co(II/III)的电解质结合时的开路光电压分别比基于I/I电解质的器件高出105、147、167和75 mV。基于WS3的器件在AM 1.5 G 100 mW/cm光照下显示出最高的功率转换效率，为7.4%，这主要归因于高开路电压( )。