*3.1.2.2. Electron beam‐induced current (EBIC) [117]*

Another method to obtain the electrical parameters is EBIC from which the calculated carrier diffusion length forCH3 NH3 PbI3−*<sup>x</sup>* Cl*<sup>x</sup>* is 1.5–1.9 μm [40]. The carrier diffusion length is compa‐ rable or longer than that of other polycrystalline semiconductors with direct bandgaps used in solar cells [76, 77, 118–120]
