Charging of meteoric smoke and ice particles in the mesosphere including photoemission and photodetachment rates

► Charging of NLC aerosols is modeled including photo-charging rates. ► Three materials were used: ice, MSP, and a core of MSP covered in ice. ► Photodetachment is significant for ice particles with radius greater than 10 nm. ► MSP core in ice aerosol increases photo-charging rates. ► Positive and negative layers may coexist due to large densities of NLC aerosols.