The unique capabilities of hBN's color centers have found application in quantum information processing. The zero-phonon line (ZPL), a distinct feature characterizing electronic transitions without concurrent involvement of vibrational modes or phonons, plays a pivotal role in understanding the luminescent behavior of defects. The ZPL represents a sharp and well-defined emission peak, indicative of a purely electronic transition within the defect. The purity of this electronic transition is particularly significant for applications in quantum optics, where the optically active V N N B defect's ZPL not only provides a clear signature of its luminescent behavior but also serves as a reliable and controllable source of single-photon emission, advancing applications in quantum optics and information processing.