New donor–π–acceptor sensitizers containing 5H-[1,2,5]thiadiazolo [3,4-f]isoindole-5,7(6H)-dione and 6H-pyrrolo[3,4-g]quinoxaline-6,8(7H)-dione units

• DOI: 10.1039/c3cc00060e
• Publication Date: 2013-01-29T15:10:56Z
• Authors: Hairong Li; Teck Ming Koh; Anders Hagfeldt; Michael Grätzel; Subodh G. Mhaisalkar; Andrew C. Grimsdale
• Keywords: donor pi acceptor thiadiazoloisoindoledione pyrroloquinoxalinedione dye sensitizer solar cell; 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Two new D-π-A sensitizers (L101 and L102) incorporating 5H-[1,2,5]thiadiazolo [3,4-f]isoindole-5,7(6H)-dione and 6H-pyrrolo[3,4-g]quinoxaline-6,8(7H)-dione core structures were synthesized and tested in liquid dye-sensitized solar cells (DSCs). L102 achieved a promising power conversion efficiency (PCE) of 6.2% (AM 1.5, 100 mW cm(-2)).