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Ruthenium and Osmium Complexes That Bear Functional Azolate Chelates for Dye‐Sensitized Solar Cells
Author(s) -
Chi Yun,
Wu KuanLin,
Wei TzuChien
Publication year - 2015
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201403261
Subject(s) - dye sensitized solar cell , ruthenium , electrochemistry , materials science , metal , nanotechnology , photochemistry , energy transformation , chelation , renewable energy , osmium , combinatorial chemistry , chemistry , catalysis , inorganic chemistry , electrode , organic chemistry , physics , electrical engineering , electrolyte , engineering , metallurgy , thermodynamics
The preparation of sensitizers for dye‐sensitized solar cells (DSSCs) represents an active area of research for both sustainability and renewable energy. Both Ru II and Os II metal sensitizers offer unique photophysical and electrochemical properties that arise from the intrinsic electronic properties, that is, the higher propensity to form the lower‐energy metal‐to‐ligand charge‐transfer (MLCT) transition, and their capability to support chelates with multiple carboxy groups, which serve as a bridge to the metal oxide and enable efficient injection of the photoelectron. Here we present an overview of the synthesis and testing of these metal sensitizers that bear functional azolate chelates (both pyrazolate and triazolate), which are capable of modifying the metal sensitizers in a systematic and beneficial manner. Basic principles of the molecular designs, the structural relationship to the photophysical and electrochemical properties, and performances of the as‐fabricated DSSCs are highlighted. The success in the breakthrough of the synthetic protocols and potential applications might provide strong stimulus for the future development of technologies such as DSSCs, organic light‐emitting diodes, solar water splitting, and so forth.