**3. Dynamics of charge carriers in organo‐metal halide perovskite solar cells**

From its first use as a light absorber in a dye‐sensitized solar cell, the PCE of organo‐metal halide perovskite (OMHP) has now reached to 22.1%. Such remarkable rise has dazzled scientists and engineers that have now considered OMHP to be one of the most serious competitors to the current solar cell industry leader, silicon. In spite of this, there are funda‐ mental photophysical processes, especially in the ultrafast time scale, that is yet to be fully explained. Details of transient spectroscopy techniques used to unravel these processes can be found in Ref. [25].
