D-π-A 染料体系，包含氰基苯甲酸作为染料敏化太阳能电池的锚定基团。
D-π-A dye system containing cyano-benzoic acid as anchoring group for dye-sensitized solar cells.
机构信息
Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.
出版信息
Langmuir. 2011 Dec 6;27(23):14248-52. doi: 10.1021/la203104v. Epub 2011 Oct 31.
A D-π-A dye (KM-1) incorporating cyano-benzoic acid as a new acceptor/anchoring group has been synthesized for dye-sensitized solar cells (DSCs) with a high molar extinction coefficient of 66,700 M(-1) cm(-1) at 437 nm. Theoretical calculations show that the hydrogen bond between -CN and surface hydroxyl leads to the most stable configuration on the surface of TiO(2). In addition, the adsorption of the dye on TiO(2) follows a Brunauer-Emmett-Teller (BET) isotherm. Multilayer adsorption of KM-1 on TiO(2) seems to take place particularly at higher dye concentrations. DSC device using KM-1 reached a maximum incident photon-to-current conversion efficiency (IPCE) of 84%, with a solar to electric power conversion efficiency (PCE) of 3.3% at AM1.5 G illumination (100 mW cm(-2)). This new type of anchoring group paves a way to design new dyes that combine good visible light harvesting with strong binding to the metal oxide surface.
一种 D-π-A 染料（KM-1），其中氰基苯甲酸作为新的受体/锚定基团，其摩尔消光系数高达 66700M(-1)cm(-1)，在 437nm 处。理论计算表明，-CN 与表面羟基之间的氢键导致 TiO(2)表面上最稳定的构型。此外，染料在 TiO(2)上的吸附遵循 Brunauer-Emmett-Teller（BET）等温线。在较高的染料浓度下，KM-1 在 TiO(2)上似乎发生了多层吸附。使用 KM-1 的 DSC 器件在 AM1.5G 照明（100mWcm(-2)）下达到了 84%的最大入射光子到电流转换效率（IPCE），光电转换效率（PCE）为 3.3%。这种新型的锚固基团为设计新的染料开辟了道路，这些染料将良好的可见光捕获与与金属氧化物表面的强结合结合在一起。
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