title: Study on a series of novel self-assembly supramolecular solar cells based on a double-layer structured chromophore of Zn-porphyrins.
abstract: We prepared in this work an anchoring porphyrin and a series of hat-porphyrins. The zinc atom of the hat-porphyrins can be coordinated axially with the pyridine moiety of the anchoring porphyrin which is anchored on the titania surface by a carboxyl group. The structures of the assemblies were confirmed using computational calculations, transmission electron microscopy (TEM) and energy dispersive spectrometry (EDS). Solar cell devices of the monomer anchoring porphyrin and its assemblies were fabricated and the photovoltaic performances were measured under standard AM 1.5 sunlight irradiance. We found that the assembly devices showed higher JSC and lower VOC than that of the monomer anchoring porphyrin device. However, the comprehensive influence of JSC and VOC led to an enhancement in the solar-to-electric power-conversion efficiency (PCE) of the assemblies. We also studied the variation of JSC and VOC using electronic absorption and emission spectroscopy, charge extraction measurements, transient photovoltage decay measurements and electrochemical impedance spectroscopy.
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China. jcliu8@nwnu.edu.cn.
authors.forename: Fa-Ming
authors.initials: FM
authors.lastname: Han
authors.forename: Jiong-Yuan
authors.initials: JY
authors.lastname: Yang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhe
authors.forename: Ji-Wen
authors.initials: JW
authors.lastname: Chen
authors.forename: Jia-Cheng
authors.initials: JC
authors.lastname: Liu
authors.forename: Ren-Zhi
authors.initials: RZ
authors.lastname: Li
authors.forename: Xiao-Jie
authors.initials: XJ
authors.lastname: Jin
authors.forename: Guo-Hui
authors.initials: GH
authors.lastname: Zhao