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Thiazolocatechol: Electron‐Withdrawing Catechol Anchoring Group for Dye‐Sensitized Solar Cells
Author(s) -
Higashino Tomohiro,
Iiyama Hitomi,
Kurumisawa Yuma,
Imahori Hiroshi
Publication year - 2019
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201900342
Subject(s) - catechol , anchoring , polar effect , dye sensitized solar cell , group (periodic table) , chemistry , photochemistry , organic chemistry , psychology , social psychology , electrode , electrolyte
Anchoring groups adopting a five‐membered bidentate chelating are attractive to realize high power conversion efficiency ( η ) and long‐term durability in dye‐sensitized solar cells (DSSCs). In this regard, we chose catechol as an anchoring group that can adopt the chelating. However, the DSSCs with catechol‐based sensitizers have never exceeded an η ‐value of 2 %. These poor photovoltaic performances may be associated with the electron‐donating ability of the hydroxy groups in catechol. Considering these, we envisioned that fusing an electron‐withdrawing thiazole moiety with a catechol anchoring group would improve its photovoltaic performance. Herein, we report a push‐pull porphyrin sensitizer ZnPTC with a thiazolocatechol anchoring group. The DSSC with ZnPTC exhibited η =4.87 %. This value is the highest ever reported for catechol‐anchor based DSSCs. Meanwhile, the long‐term cell durability was not improved, although the robust anchoring properties were attained under harsh conditions.