A polymer gel electrolyte to achieve ≥6% power conversion efficiency.pdf

View Online PAPER /materials | Journal of Materials Chemistry A polymer gel electrolyte to achieve $6% power conversion efficiency with a novel organic dye incorporating a low-band-gap chromophore Jeum-Jong Kim,a Hyunbong Choi,a Ji-Won Lee,b Moon-Sung Kang,b Kihyung Song,c Sang Ook Kang*a and Jaejung Ko*a Received 3rd June 2008, Accepted 16th August 2008 First published as an Advance Article on the web 26th September 2008 DOI: 10.1039/b809376h A quasi-solid-state dye-sensitized solar cell with novel organic sensitizers incorporating H a benzothiadiazole chromophore showed excellent long-term stability, which exhibited 10% decrease 6 7 3 during the 1000 h light soaking; the optimized cell gave a short circuit photocurrent density of 12.03 mA 9 0 2 8 cm , an open circuit voltage of 0.720 V and a fill factor of 0.76, corresponding to an overall conversion B / 0 9 efficiency of 6.61% under standard global AM 1.5 solar conditions. 1 3 0 0 2 1 . r 0 e 1 b : m i e o Introduction While high conversion efficiency of 7% has been reached with d c | e g JK-46 using an ionic liquid under solvent-free conditions, the D r 6 o. Increasing energy demands and depletion of fossil fuels have long-term stability still remains a major challenge due to the 0 c