| 초록 |
To overcome the energy and environmental problems, solar cells are developed as a renewable green energy technology. Polymer solar cells (PSCs) have drawn great attention and became a promising photovoltaic technique because of the unique advantages of low cost, large-area roll-to-roll fabrication, and the possibility of integration into flexible devices.[1] Regardless of those advantages, PSCs still have fairly low efficiency but it is still viable alternative for mass-production because of its low cost process. In this study, we designed new electron donor-acceptor conjugated polymers using benzimidazole derivatives with different electron-deficient groups and applied for PSCs. The TTI and benzimidazole were coupled by Stille polymerization. The device composed of HS-5611 showed the highest parameters with VOC of 0.7 V, JSC of 9.16 mA/cm2, and FF of 0.43, giving a PCE of 2.84%. [1] Su, Y.-W; Lan, S.-C.; Wei, K.-H. Organic photovoltaics. Mater. Today, 2012, 15, 554-562. |
