  The advanced multijunction solar cell (MJSC) has emerged as a frontrunner
with higher efficiency in photovoltaic literature. It started its journey with
a modest 20% efficient tandem solar cell, and today, it has reached an
impressive 47.1% photoconversion efficiency (PCE) with six junction
combinations. Since the early 1990s, these solar cells have been utilised for
space applications. Recently, there has been a trend of using this genre for
terrestrial applications as well. However, the complexity and high cost of the
fabrication procedure have been the significant challenges over the last three
decades. The photovoltaic (PV) community has witnessed a variety of fabrication
approaches to address these hurdles. This paper reviews the progression of
computational and experimental research approaches of III-V MJSCs and their
fabrication processes. In addition, it addresses the barriers hindering the
progress of these cells and their prospects. This review gathers insights from
a handful number of articles on III-V MJSCs to provide a comprehensive guide
for the new entrants, experts and practitioners about the research
methodologies, growth techniques, current status, challenges, and opportunities
in a timely and conscious manner.
