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The amount of electrical energy produced by a given solar photovoltaic module can be increased by using concentrated solar radiation. The task can be accomplished by integrating optical concentrators with flat PV modules. Compound parabolic concentrators (CPCs) have emerged as one of the best options for concentrating PV applications due to their ability to collect both direct and diffuse solar radiation and being suitable for stationary installation. Over the last few decades, various designs of CPCs have been proposed and investigated by many researchers for concentrating PV applications. This article presents a comprehensive review of recent developments in CPC designs and applications for PV systems. This work mainly focuses on identifying the major challenges and research opportunities related to the design and development of CPCs, rendering them more beneficial for solar energy conversion. It …