Novel zinc porphyrin sensitizers for dye-sensitized solar cells: Synthesis and spectral, electrochemical, and photovoltaic properties

作者：Tan, Qinglong; Zhang, Xuejun^*; Mao, Lijun; Xin, Guanqiong; Zhang, Shuanfen

来源：Journal of Molecular Structure, 2013, 1035: 400-406.

DOI：10.1016/j.molstruc.2012.12.003

• Porphyrin derivative
• Schiff base unit
• Donor-acceptor systems
• Power conversion efficiency
• Solar cells
• Photovoltaic performances

Two donor-pi-spacer-acceptor porphyrin dyes were synthesized for use in dye-sensitized solar cells. The dyes comprised the same donor (porphyrin derivative) consisting of 3,4,5-trimethoxybenzaldehyde and acceptor/anchoring group (carboxyl group) but varying pi-spacer consisting of a Schiff base structure. Each of the dyes displayed different adsorption behavior and coverage on the TiO2 surface. The porphyrin dyes P-Zn-BIA-COOH studied in this work exhibit red-shifted and broadened electronic spectra respect to the reference P-Zn-COOH as expected. By the introduction of Schiff base unit at the meso positions, the energy level of E-ox (excited-state oxidation potentials) is significantly shifted to the positive compared with the reference P-Zn-COOH, indicating a decreased HOMO-LUMO gap. The highest power conversion efficiency of the two dyes based on DSSCs reached 1.75% under AM 1.5 G irradiation.

• 出版日期2013-3-13
• 单位中北大学