A comparative study on properties of two phenoxazine-based dyes for dye-sensitized solar cells

作者：Tan, Haijun^*; Pan, Chunyue; Wang, Gang; Wu, Yingying; Zhang, Yiping; Yu, Guipeng; Zhang, Min

来源：Dyes and Pigments, 2014, 101: 67-73.

DOI：10.1016/j.dyepig.2013.09.039

• Phenoxazine
• Conjugated direction
• Phenyl ring
• Alkyl chain
• Dye-sensitized solar cells
• Photovoltaic performances

Two phenoxazine (POZ)-based organic D-pi-A sensitizers (POZ-1 and POZ-2) were synthesized. Then these two dyes were applied in dye-sensitized solar cells (DSSCs) to investigate the influence of different conjugated direction, extra phenyl ring and alkyl chain on the light-harvesting, energy level and photovoltaic properties through a joint spectral, electrochemical and photovoltaic study. The result shows that dye POZ-2 exhibits higher power conversion efficiency (eta = 6.5%) than dye POZ-1 (eta = 2.4%) under standard illumination (Global Air Mass 1.5). Besides, the geometries of the dyes were optimized to gain insight into the molecular structure and electron distribution. The charge extraction and transient photovoltage decay measurements were further performed to understand the alterative order of efficiency.

• 出版日期2014-2
• 单位中南大学; 中国科学院长春应用化学研究所