The charge collection efficiency, dark current, energy resolution, I–V characteristics, and time response characteristics are critical performance parameters for diamond nuclear detectors. Numerous research institutes are actively engaged in enhancing these parameters. However, it is important to note that there exists a significant disparity between the current achieved values and the theoretical benchmarks. The size and shape of polycrystalline diamond are bigger compared to monocrystalline diamond, hence facilitating a wider range in the detection area of the device.