TY - JOUR
T1 - Ruthenium(II) photosensitizers with electron-rich diarylamino-functionalized 2,2′-bipyridines and their application in dye-sensitized solar cells
AU - Wang, Qiwei
AU - Wu, Wenjun
AU - HO, Cheuk Lam
AU - Xue, Liqin
AU - Lin, Zhenyang
AU - Li, Hua
AU - Lo, Yih Hsing
AU - WONG, Wai Yeung
N1 - Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - New ruthenium(II) photosensitizers [Ru(dcbpy)(L)(NCS)2] (dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine; L = 4,4′-bis{di[4-(N,N′-dimethylamino)phenyl]amino}-2,2′-bipyridine (1), 4,4′-bis[di(4-methoxyphenyl)amino]-2,2′-bipyridine (2), and 4,4′-bis[di(4-tolyl)amino]-2,2′-bipyridine (3)) were prepared and characterized and their application in dye-sensitized solar cells is presented. The optical absorption of these photosensitizers gives a peak at around 540 nm, which is very similar to that of the standard N719. The maximum incident photon-to-current conversion efficiency (IPCE) of 80.6% was obtained for 3, which corresponded to a power conversion efficiency (η) of 5.68% under standard air mass (AM) 1.5 sunlight (versus N719 at 6.76%). Molecular cosensitization of 3 with an organic dye, QS-DPP-I, yielded higher η values up to 6% relative to the cells based on individual photosensitizers, and the corresponding IPCE can reach 93.6% at 549 nm. A preliminary stability test of the devices was also conducted.
AB - New ruthenium(II) photosensitizers [Ru(dcbpy)(L)(NCS)2] (dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine; L = 4,4′-bis{di[4-(N,N′-dimethylamino)phenyl]amino}-2,2′-bipyridine (1), 4,4′-bis[di(4-methoxyphenyl)amino]-2,2′-bipyridine (2), and 4,4′-bis[di(4-tolyl)amino]-2,2′-bipyridine (3)) were prepared and characterized and their application in dye-sensitized solar cells is presented. The optical absorption of these photosensitizers gives a peak at around 540 nm, which is very similar to that of the standard N719. The maximum incident photon-to-current conversion efficiency (IPCE) of 80.6% was obtained for 3, which corresponded to a power conversion efficiency (η) of 5.68% under standard air mass (AM) 1.5 sunlight (versus N719 at 6.76%). Molecular cosensitization of 3 with an organic dye, QS-DPP-I, yielded higher η values up to 6% relative to the cells based on individual photosensitizers, and the corresponding IPCE can reach 93.6% at 549 nm. A preliminary stability test of the devices was also conducted.
KW - Charge transfer
KW - Density functional calculations
KW - Ligand effects
KW - Ruthenium
KW - Sensitizers
KW - Solar cells
UR - http://www.scopus.com/inward/record.url?scp=84923132200&partnerID=8YFLogxK
U2 - 10.1002/ejic.201402396
DO - 10.1002/ejic.201402396
M3 - Article
AN - SCOPUS:84923132200
SN - 1434-1948
VL - 2014
SP - 5322
EP - 5330
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 31
ER -