用于染料敏化太阳能电池中的功能化炔基铂（II）多吡啶配合物作为敏化剂。

Functionalized alkynylplatinum(II) polypyridyl complexes for use as sensitizers in dye-sensitized solar cells.

机构信息

Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee (Hong Kong), Department of Chemistry and HKU-CAS Joint Laboratory of New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China.

出版信息

Chemistry. 2010 Oct 25;16(40):12244-54. doi: 10.1002/chem.201001424.

DOI:10.1002/chem.201001424

PMID:20842671

Abstract

A series of platinum(II) alkynyl-based sensitizers has been synthesized and found to show light-to-electricity conversion properties. These dyes were developed as sensitizers for the application in nanocrystalline TiO(2) dye-sensitized solar cells (DSSCs). Their photophysical and electrochemical properties were studied. The excited-state property was probed using nanosecond transient absorption spectroscopy, which showed the formation of a charge-separated state that arises from the intramolecular photoinduced charge transfer from the platinum(II) alkynylbithienylbenzothiadiazole moiety (donor) to the polypyridyl ligand (acceptor). A lifetime of 3.4 μs was observed for the charge-separated state. A dye-sensitized solar cell based on one of the complexes showed a short-circuit photocurrent of 7.12 mA cm(-2), an open circuit voltage of 780 mV, and a fill factor of 0.65, thus giving an overall power conversion efficiency of 3.6%.

摘要

一系列基于铂(II)炔基的敏化剂已被合成，并被发现具有光电流转换性能。这些染料被开发为用于纳米晶 TiO(2)染料敏化太阳能电池 (DSSC) 的敏化剂。研究了它们的光物理和电化学性质。通过纳秒瞬态吸收光谱研究了激发态性质，结果表明从铂(II)炔基联噻吩苯并噻二唑部分（供体）到多吡啶配体（受体）发生了分子内光诱导电荷转移，形成了电荷分离态。观察到电荷分离态的寿命为 3.4 μs。基于其中一个配合物的染料敏化太阳能电池表现出 7.12 mA cm(-2)的短路光电流、780 mV 的开路电压和 0.65 的填充因子，因此总功率转换效率为 3.6%。