Tetrahedron

Novel organic sensitizers containing a bulky spirobifluorene unit for solar cell

N Cho, H Choi, D Kim, K Song, M Kang, SO Kang, J Ko

Index: Cho, Nara; Choi, Hyunbong; Kim, Duckhyun; Song, Kihyung; Kang, Moon-sung; Kang, Sang Ook; Ko, Jaejung Tetrahedron, 2009 , vol. 65, # 31 p. 6236 - 6243

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Citation Number: 53

Abstract

Three organic sensitizers JK-87, JK-88, and JK-89 containing a bulky spirobifluorene unit in the bridged group are designed and synthesized. Under standard global AM 1.5 solar condition, the JK-89 sensitized cell gave a short-circuit photocurrent density (Jsc) of 13.02 mAcm− 2, an open-circuit voltage (Voc) of 0.75 V, and a fill factor of 0.70, corresponding to an overall conversion efficiency η of 6.83%. The η of JK-89 is higher than those of other ...