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Implementation of data-cube pump-probe KPFM on organic solar cells.

ABSTRACT: 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.

SUBMITTER: Grevin B

PROVIDER: S-EPMC7034223 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Implementation of data-cube pump-probe KPFM on organic solar cells.

Grévin Benjamin B Bardagot Olivier O Demadrille Renaud R

Beilstein journal of nanotechnology 20200212

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 <i>z</i>-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 PC<sub>71</sub>BM is subsequently i ...[more]

PMID: 32117670

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