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Novel metal complexes for D‐(A‐π‐A) 2 motif dye sensitizer: Synthesis and photovoltaic application
Author(s) -
Zhang Houpeng,
Wu Xianming,
Tang Shiyu,
Wang Kaixuan,
Tian Yong,
Zhong Chaofan
Publication year - 2021
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.6220
Subject(s) - photocurrent , chemistry , acceptor , metal , dye sensitized solar cell , energy conversion efficiency , electrochemistry , electron acceptor , inorganic chemistry , photochemistry , electrolyte , organic chemistry , electrode , materials science , optoelectronics , physics , condensed matter physics
Four metal complexes BDTT‐PCd, BDTT‐PZn, BDTT‐PCu, and BDTT‐PCo with the symmetrical structure were designed, synthesized, and characterized, which would be used as D‐(A‐π‐A) 2 motif dye sensitizers. These complexes adopt Cd(II), Zn(II), Cu(II), and Co(II) complexes as auxiliary electron acceptors (A), thienylbenzo[1,2‐ b :4,5‐ b ′]dithiophene (BDTT) as electron donor (D), and the 8‐quinolinol derivative as the π bridge and the acceptor (A) of D‐(A‐π‐A) 2 motif dye sensitizers. The photophysical, electrochemical, and photovoltaic properties of these complexes have been investigated. The four complexes‐based dye‐sensitized solar cells (DSSCs) device exhibited a short‐circuit photocurrent density ( J sc ) of 17.51, 17.02, 15.07, and 14.38 mA cm −2 and an attractive power conversion efficiency ( η ) of 8.82%, 8.32%, 8.03%, and 7.55%, respectively, under the AM 1.5 irradiation (100 mW cm −2 ). The photovoltaic conversion efficiency (PCE) and the short‐circuit photocurrent density ( J sc ) of BDTT‐PCd, BDTT‐PZn, BDTT‐PCu, and BDTT‐PCo are sequentially reduced; it attributed to the difference of the electron‐withdrawing ability of the auxiliary acceptor resulted by the difference of coordination abilities of metal ions Cd(II), Zn(II), Cu(II), and Co(II) with ligand. These results provide strong evidence that D‐(A‐π‐A) 2 motif complexes has great potential as promising photosensitizers in the applications of DSSCs.