Document Type
Journal Article
Department/Unit
Department of Chemistry
Title
New fluorenone-containing organic photosensitizers for dye-sensitized solar cells
Language
English
Abstract
Four new organic dyes (F1-F4) comprising the triarylamine or fluorene unit as an electron-donating group, a less commonly used fluorenone spacer and a cyanoacrylic acid as the anchoring group in the molecular framework were synthesized, characterized and utilized in dye-sensitized solar cells (DSSCs). Their absorption, photoluminescence, electrochemical and photovoltaic properties were fully investigated in detail. Electrochemical data indicate that the tuning of the HOMO and LUMO energy levels can be conveniently accomplished by alternating the donor moiety. The photovoltaic performance can be increased by adding an electron-donating triarylamine or fluorene unit next to the fluorenone ring or increasing the number of thienyl ring next to the cyanoacrylic acid group, which is consistent with the results from electrochemical impedance spectroscopy. The maximal monochromatic incident photon-to-current conversion efficiency (IPCE) can reach up to 80% for DSSC devices based on F4 with the overall light to electricity conversion efficiency up to 4.71% (Voc = 565 mV, Jsc = 11.71 mA cm-2 and FF = 0.71) under AM 1.5 irradiation (100 mW cm-2). © 2013 Elsevier Ltd. All rights reserved.
Keywords
Arylamine, Dye-sensitized solar cells, Fluorene, Fluorenone, Organic dye, Photosensitizer
Publication Date
2013
Source Publication Title
Dyes and Pigments
Volume
98
Issue
3
Start Page
428
End Page
436
Publisher
Elsevier
DOI
10.1016/j.dyepig.2013.03.007
Link to Publisher's Edition
ISSN (print)
01437208
ISSN (electronic)
18733743
Recommended Citation
Lai, Lai-Fan, Chuanjiang Qin, Chung-Hin Chui, Ashraful Islam, Liyuan Han, Cheuk-Lam Ho, and Wai-Yeung Wong. "New fluorenone-containing organic photosensitizers for dye-sensitized solar cells." Dyes and Pigments 98.3 (2013): 428-436.