Dihydrophenanthrene-based metal-free dyes for highly efficient cosensitized solar cells

Ryan Yeh-Yung Lin; Yung-Sheng Yen; Yung-Tse Cheng; Chuan-Pei Lee; Ying-Chan Hsu; Hsien-Hsin Chou; Chih-Yu Hsu; Yung-Chung Chen; Jiann T Lin; Kuo-Chuan Ho; Chiitang Tsai

doi:10.1021/ol301374c

Dihydrophenanthrene-based metal-free dyes for highly efficient cosensitized solar cells

Org Lett. 2012 Jul 20;14(14):3612-5. doi: 10.1021/ol301374c. Epub 2012 Jul 9.

Authors

Ryan Yeh-Yung Lin¹, Yung-Sheng Yen, Yung-Tse Cheng, Chuan-Pei Lee, Ying-Chan Hsu, Hsien-Hsin Chou, Chih-Yu Hsu, Yung-Chung Chen, Jiann T Lin, Kuo-Chuan Ho, Chiitang Tsai

Affiliation

¹ Institute of Chemistry, Academia Sinica , Nankang, Taipei 11529, Taiwan, Department of Chemical Engineering, National Taiwan University , Taipei, 10617, Taiwan, Department of Chemistry, Chinese Culture University , Taipei, Taiwan, and Institute of Polymer Science and Engineering, National Taiwan University , Taipei 10617, Taiwan.

PMID: 22775301
DOI: 10.1021/ol301374c

Abstract

Metal-free dyes (BP-1 to BP-3) containing a 9,10-dihydrophenanthrene unit in the spacer have been synthesized. The dye with the highest cell efficiency, BP-2, was used in combination with SQ2 for cosensitized DSSCs. The cosensitized DSSC in which the ratio of BP-2 and SQ2 is 8:2 (v/v) has a record high efficiency of 8.14% among cosensitized systems using all metal-free sensitizers. Dye distribution along the TiO2 film depth was analyzed by an Auger electron spectroscopy technique.