Bulk Heterojunction Photovoltaic Cells Based On Poly(3-hexyltiophene) and Pyran-4-ylidene-2-cyanoacetate Derivative

Abstract

The effects of organic dye, pyran-4-ylidene-2-cyanoacetate derivative, and annealing on the dye-doped bulk heterojunction photovoltaics (PV) based with poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-(6,6)C61 (PCBM) have been investigated. The structures of the PV cells were ITO/PSS:PEDOT/P3HT:PCBM (1:1 wt.%)/Al and ITO/PSS:PEDOT/P3HT:PCBM:Pyran-4-ylidene-2-cyanoacetate derivative (1:1:0.5 wt.%)/Al electrode. Using the thermal treatment of the PV cell containing the organic dye at 140°C for 5 min, an increase in power conversion efficiency to 2.0% and external quantum efficiency (IPCE) to 36% are demonstrated.

Keywords:

• bulk heterojunction
• cyanoacetate derivative
• organic photovoltaic
• PCBM
• poly(3-hexylthiopene)

Acknowledgments

This work was supported by Korea Electrical Engineering & Science Research Institute.

Notes

Active area 0.25 cm², AM 1.5 and 92 mW cm⁻², annealed in air.