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Highly Efficient Dye‐Sensitized Solar Cells Based on Panchromatic Ruthenium Sensitizers with Quinolinylbipyridine Anchors
Author(s) -
Chou ChunCheng,
Hu FaChun,
Yeh HsiuHsuan,
Wu HsinPei,
Chi Yun,
Clifford John N.,
Palomares Emilio,
Liu ShihHung,
Chou PiTai,
Lee GeneHsiang
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201305975
Subject(s) - ruthenium , chemistry , substituent , panchromatic film , bipyridine , photochemistry , molar absorptivity , irradiation , stereochemistry , crystallography , organic chemistry , optics , crystal structure , physics , image resolution , nuclear physics , catalysis
Panchromatic Ru II sensitizers TF‐30–TF‐33 bearing a new class of 6‐quinolin‐8‐yl‐2,2′‐bipyridine anchor were synthesized and tested under AM1.5 G simulated solar irradiation. Their increased π conjugation relative to that of the traditional 2,2′:6′,2′′‐terpyridine‐based anchor led to a remarkable improvement in absorptivity across the whole UV–Vis–NIR spectral regime. Furthermore, the introduction of a bulky tert ‐butyl substituent on the quinolinyl fragment not only led to an increase in the J SC value owing to the suppression of dye aggregation, but remarkably also resulted in no loss in V OC in comparison with the reference sensitizer containing a tricarboxyterpyridine anchor. The champion sensitizer in DSC devices was found to be TF‐32 with a performance of J SC =19.2 mA cm −2 , V OC =740 mV, FF=0.72, and η =10.19 %. This 6‐quinolin‐8‐yl‐2,2′‐bipyridine anchor thus serves as a prototype for the next generation of Ru II sensitizers with any tridentate ancillary.