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Photoelectric effect using two photon processes is a new research area interest that referrers to science and technology fields to find out new solar cells. In this review article focuses on examining light-matter interaction in quantum processes which are directly or indirectly related to the photoelectric effect and highlighting recent research results. This model is used as a tool to understand and the theoretical limits of the two-color photovoltaic (TPPV) phenomenon and discussed that are useful generation phtovoltaic (PV) materials which are targeting higher efficiency solar cells. This study will focus on the limitations of current photovoltaic cell devices which are high stability, high efficiency and explore current research for the advancement of solar cell technology the possibilities to improve cell technology.

In recent advance, laser atom interaction has made significant progress in theoretical and experimental method. This article is devoted to a review of recent relativistic High Harmonic Generation (HHG) and Above Threshold Ionization (ATI) in intense laser field is investigated via the Klein-Gordon equation with ponderomotive approach. Thus, in relativistic effects at higher intensity are discussed within strong field approximation (SFA). Moreover, with this relativistic effect shows the simple representation in harmonic spectrum for Ar8+ ion exposed to 800 nm laser field and will be given current information on how the harmonic spectrum changes and how it will be affected attosecond pulse production in ultra-fast dynamic.