Fig. 1: Photoconductivity mapping on FACsPbI3 and diffusion analysis. | Nature Communications

Fig. 1: Photoconductivity mapping on FACsPbI3 and diffusion analysis.

From: Superior photo-carrier diffusion dynamics in organic-inorganic hybrid perovskites revealed by spatiotemporal conductivity imaging

Fig. 1

a Schematic of the iMIM setup with either the tip-scan or sample-scan mode. The tr-iMIM configuration is shown inside the dash-dotted box. The FACsPbI3 thin film deposited on a glass substrate and encapsulated by a PMMA layer (Sample A) is also illustrated. b Tip-scan iMIM images when the sample is illuminated by a 446-nm diode laser at PC = 100 mW/cm2. c Photoconductivity map based on the iMIM data and FEA simulation. The dashed lines are various linecuts for the calculation of average signals. d Image of the laser spot taken by a CCD camera. e Line profiles of averaged photoconductivity and laser intensity, from which the diffusion length can be extracted. The solid black and dashed gray lines represent the best curve fitting and upper/lower bounds, respectively. All scale bars are 10 μm.

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