Cosensitized Porphyrin System for High-Performance Solar Cells with TOF-SIMS Analysis

	Cosensitized Porphyrin System for High-Performance Solar Cells with TOF-SIMS Analysis
	Wu, Wenjun 1,2; Xiang, Huaide 1,2; Fan, Wei 3; Wang, Jinglin 1,2; Wang, Haifeng 1,2; Hua, Xin 1,2; Wang, Zhaohui 3; Long, Yitao 1,2; Tian, He 1,2; Zhu, Wei-Hong 1,2
刊名	ACS APPLIED MATERIALS & INTERFACES
	2017-05-17
卷号	9 期号:19 页码:16081-16090
关键词	Solar Cells Organic Sensitizes Cosensitization Tof-sims Photovoltaics
英文摘要	To date, development of organic sensitizers has been predominately focused on light harvesting, highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels, and the electron transferring process. In contrast, their adsorption mode as well as the dynamic loading behavior onto nanoporous TiO2 is rarely considered. Herein, we have employed the time-of-flight secondary ion mass spectrometry (TOF-SIMS) to gain insight into the competitive dye adsorption mode and kinetics in the cosensitized porphyrin system. Using novel porphyrin dye FW-1 and D-A-pi-A featured dye WS-5, the different bond-breaking mode in TOF-SIMS and dynamic dye-loading amount during the coadsorption process are well-compared with two different anchoring groups, such as benzoic acid and cyanoacrylic acid. With the bombardment mode in TOF-S1MS spectra, we have speculated that the cyano group grafts onto nanoporous TiO2 as tridentate binding for the common anchoring unit of cyanoacrylic acid and confirmed it through extensive first-principles density functional theory calculation by anchoring either the carboxyl or cyano group, which shows that the cyano group can efficiently participate in the adsorption of the WS-5 molecule onto the TiO2 nanocrystal. The grafting reinforcement interaction between the cyano group and TiO2 in WS-5 can well-explain the rapid adsorption characteristics. A strong coordinate bond between the lone pair of electrons on the nitrogen or oxygen atom and the Lewis acid sites of TiO2 can increase electron injection efficiencies with respect to those from the bond between the benzoic acid group and the Bronsted acid sites of the TiO2 surface. Upon optimization of the coadsorption process with dye WS-5, the photoelectric conversion efficiency based on porphyrin dye FW-1 is increased from 6.14 to 9.72%. The study on the adsorption dynamics of organic sensitizers with TOF-SIMS analysis might provide a new venue for improvement of cosensitized solar cells.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38534]
专题	化学研究所_有机固体实验室
作者单位	1.East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China 2.East China Univ Sci & Technol, Inst Fine Chem, Ctr Computat Chem, Shanghai Key Lab Funct Mat Chem,Sch Chem & Mol En, Shanghai 200237, Peoples R China 3.Chinese Acad Sci, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wu, Wenjun,Xiang, Huaide,Fan, Wei,et al. Cosensitized Porphyrin System for High-Performance Solar Cells with TOF-SIMS Analysis[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(19):16081-16090.
APA	Wu, Wenjun.,Xiang, Huaide.,Fan, Wei.,Wang, Jinglin.,Wang, Haifeng.,...&Zhu, Wei-Hong.(2017).Cosensitized Porphyrin System for High-Performance Solar Cells with TOF-SIMS Analysis.ACS APPLIED MATERIALS & INTERFACES,9(19),16081-16090.
MLA	Wu, Wenjun,et al."Cosensitized Porphyrin System for High-Performance Solar Cells with TOF-SIMS Analysis".ACS APPLIED MATERIALS & INTERFACES 9.19(2017):16081-16090.