Implementation of data-cube pump-probe KPFM on organic solar cells.
Benjamin GrevinOlivier BardagotRenaud DemadrillePublished in: Beilstein journal of nanotechnology (2020)
An implementation of pump-probe Kelvin probe force microscopy (pp-KPFM) is reported that enables recording the time-resolved surface potential in single-point mode or over a 2D grid. The spectroscopic data are acquired in open z-loop configuration, which simplifies the pp-KPFM operation. The validity of the implementation is probed by measurements using electrical pumping. The dynamical photoresponse of a bulk heterojunction solar cell based on PTB7 and PC71BM is subsequently investigated by recording point-spectroscopy curves as a function of the optical power at the cathode and by mapping 2D time-resolved images of the surface photovoltage of the bare organic active layer.
Keyphrases
- solar cells
- high resolution
- single molecule
- living cells
- primary care
- healthcare
- quality improvement
- quantum dots
- electronic health record
- high speed
- big data
- optical coherence tomography
- deep learning
- water soluble
- cell therapy
- single cell
- convolutional neural network
- machine learning
- atomic force microscopy
- risk assessment
- fluorescent probe
- stem cells
- density functional theory
- human health
- data analysis
- artificial intelligence
- label free