A new D-A-pi-A type organic sensitizer based on substituted dihydroindolo [2,3-b] carbazole and DPP unit with a bulky branched alkyl chain for highly efficient DSCs

作者：Tian, Guojian; Cai, Shengyun; Li, Xin; Agren, Hans; Wang, Qiaochun; Huang, Jinhai; Su, Jianhua^*

来源：Journal of Materials Chemistry A, 2015, 3(7): 3777-3784.

DOI：10.1039/c4ta05162a

• GAUSSIAN-BASIS SETS
• SOLAR-CELLS
• ENERGY-LEVELS
• ATOMS LI
• LOW-COST
• DYE
• PERFORMANCE
• PEROVSKITE
• DONOR
• PORPHYRINS

Two new D-A-pi-A configuration metal-free organic sensitizers (T1-T2) based on 5,7-dihexyl-6,12-diphenyl-5,7-dihydroindolo[2,3-b]carbazole and a DPP unit with a bulky branched alkyl chain have been synthesized for dye-sensitized solar cells. Due to a bulky branched alkyl chain being attached to the donor and DPP unit, both compounds obtain high V-oc values. Under standard global AM 1.5 solar light conditions, the T1 based-device gives a high conversion efficiency of 8.24% with a J(sc) of 15.72 mA cm(-2), a V-oc of 0.74 V and a FF of 0.71. These excellent performances make the donor dihydroindolo[2,3-b] carbazole and DPP unit promising candidates for further application in DSCs.

• 出版日期2015
• 单位华东理工大学