Freund Sara, Hinaut Antoine, Marinakis Nathalie, Constable Edwin C, Meyer Ernst, Housecroft Catherine E, Glatzel Thilo
Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland.
Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 24a, 4058 Basel, Switzerland.
Beilstein J Nanotechnol. 2019 Apr 15;10:874-881. doi: 10.3762/bjnano.10.88. eCollection 2019.
Properties of metal oxides, such as optical absorption, can be influenced through the sensitization with molecular species that absorb visible light. Molecular/solid interfaces of this kind are particularly suited for the development and design of emerging hybrid technologies such as dye-sensitized solar cells. A key optimization parameter for such devices is the choice of the compounds in order to control the direction and the intensity of charge transfer across the interface. Here, the deposition of two different molecular dyes, porphyrin and coumarin, as single-layered islands on a NiO(001) single crystal surface have been studied by means of non-contact atomic force microscopy at room temperature. Comparison of both island types reveals different adsorption and packing of each dye, as well as an opposite charge-transfer direction, which has been quantified by Kelvin probe force microscopy measurements.
金属氧化物的性质，如光吸收，可通过用吸收可见光的分子物种进行敏化来影响。这种分子/固体界面特别适合于开发和设计新兴的混合技术，如染料敏化太阳能电池。此类器件的一个关键优化参数是化合物的选择，以便控制跨界面电荷转移的方向和强度。在此，通过室温下的非接触原子力显微镜研究了两种不同的分子染料卟啉和香豆素作为单层岛状结构沉积在NiO(001)单晶表面的情况。两种岛状结构类型的比较揭示了每种染料不同的吸附和堆积情况，以及相反的电荷转移方向，这已通过开尔文探针力显微镜测量进行了量化。
