期刊
ACS ENERGY LETTERS
卷 7, 期 6, 页码 1926-1938出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c00716
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- JSPS [JP20H05841, JP20H05831, JP20H05832]
Redox shuttles are crucial in the performance of DSSCs. Copper(I/II) complexes have emerged as third-generation redox shuttles and achieved up to 13% power conversion efficiency due to their more positive redox potentials.
Redox shuttles play a crucial role in the photovoltaic performance of dye-sensitized solar cells (DSSCs). A traditional iodide/ triiodide (I-/I3(-)) redox shuttle has been widely utilized in the first generation, but it suffers from intrinsic disadvantages such as a limited open-circuit voltage (V-oc). On the other hand, cobalt (II/III) complexes with polypyridyl ligands have been established as second-generation redox shuttles and have achieved a power conversion efficiency (eta) of up to 13%. Since 2016, copper(I/II) complexes have appeared as third-generation redox shuttles owing to their more positive redox potentials. The eta values of the copper-based DSSCs were low in the early stages, but to date, they have reached up to 13% as a result of modulating the molecular structures of the copper complexes and sensitizers. In this Perspective, recent developments in and prospects for copper-based DSSCs are highlighted, toward over 15% power conversion efficiency.
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