LAUSR

As an emergent 2D material, graphitic carbon nitride (g‐CN) has attracted much attention, featuring many photochemical applications and showing several advantages (e.g., low cost, earth‐abundance, and stability) over rare metals. Although most studies focus on the photoelectrochemical and photocatalytic applications of g‐CN, its unique photophysical properties can also be exploited in optoelectronic devices such as light‐emitting diodes, photodetectors, photovoltaics, and solar batteries. This review presents the background of g‐CN, emphasizes the excitonic influence on its optical properties, discusses the recent advances in g‐CN‐based optoelectronics, and examines the challenges of high‐end applications, highlighting the new directions of g‐CN research and the related prospects.