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

Beilstein Journal of Nanotechnology

Benjamin Grévin¹  Olivier Bardagot¹  Renaud Demadrille¹ 

[1] Univ. Grenoble Alpes, CNRS, CEA, IRIG-SyMMES, 38000 Grenoble, France;

关键词: bulk heterojunctions;    kelvin probe force microscopy (kpfm);    organic photovoltaics;    photocarrier dynamics;    pump–probe configuration;    time-resolved measurements;   

DOI  :  10.3762/bjnano.11.24

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown