Structurally Simple and Easily Accessible Perylenes for Dye-Sensitized Solar Cells Applicable to Both 1 Sun and...

Area of Science:

• Materials Science
• Renewable Energy
• Organic Chemistry

Background:

• Growing demand for efficient and low-cost dyes for dye-sensitized solar cells (DSSCs).
• Need for dyes that perform well under both standard sunlight and low-light conditions.

Purpose of the Study:

• To develop and evaluate novel GJ-series push-pull organic dyes for DSSCs.
• To demonstrate efficient dye performance with a simplified, four-step synthesis process.

Main Methods:

• Synthesis of GJ-series organic dyes with a donor-perylene-ethynylene-arylcarboxylic acid structure.
• Testing dye performance under simulated AM1.5G sunlight and dim light (6000 lx).
• Characterization of power conversion efficiency (PCE), open-circuit voltage (V_OC), and short-circuit current density (J_SC).

Main Results:

• The GJ-BP dye achieved a PCE of 6.16% under simulated sunlight (V_OC = 0.70 V, J_SC = 11.88 mA cm^-2).
• Under dim light (6000 lx), GJ-BP demonstrated a PCE of 15.79%.
• The simpler GJ-P dye also showed comparable dim-light performance (PCE of 15.01%).

Conclusions:

• Simplified synthesis routes can yield highly efficient organic dyes for DSSCs.
• GJ-series dyes exhibit excellent performance across a range of light conditions, including dim light.
• These dyes show potential for practical applications in solar energy conversion.