Fig. 2 | Nature Communications

Fig. 2

From: Excess charge-carrier induced instability of hybrid perovskites

Fig. 2

Facilitation of ion migration within OIHP films by excess free charges. a A scheme of the conductivity measurement setup for OIHP covered by HTL, ETL, and insulated layer under illumination at light intensity of 25 mW cm-2. b The temperature-dependent conductivity of MAPbI3 covered by PTAA, PCBM, and PS. c A scheme of setup of poling OIHP covered by PTAA, PCBM and PMMA. d EDS of MAPbI3 films covered by PTAA, PMMA, and PCBM after poling under illumination, the noise level of intensity is ca. ±1 (a.u.). e A scheme of PTIR measurement setup. f PTIR mapping of MAPbI3 film as well as those covered by PCBM and PTAA, at the same location before and after poling under illumination

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