@article{b067c31d-c0f0-4527-8a11-5469bf298fc7,
  abstract     = {{<p>A<sub>3</sub>BX<sub>6</sub> perovskites, a family of vacancy-ordered structures, exhibit diverse luminescence behaviors upon photon, electron, and high-energy excitation, primarily originating from intrinsic self-trapped excitons or dopant-induced electronic transitions. Upon B-site cation engineering, ns<sup>2</sup> cations tune intrinsic luminescence, whereas transition-metal and rare-earth dopants activate characteristic d–d, d–f, and f–f transitions, enriching A<sub>3</sub>BX<sub>6</sub> optical diversity.The tunable crystal structure and electronic configuration endow A<sub>3</sub>BX<sub>6</sub> perovskites with exceptional versatility for photoluminescence, electroluminescence, and scintillation applications.This review systematically elucidates how B-site chemistry modulates the structure–property–application relationships in this material family. P-block B-site A<sub>3</sub>BX<sub>6</sub> perovskites exhibit high photoluminescence efficiency, broadband emission, and strong ultraviolet absorption, enabling applications in high-sensitivity photodetectors (1.23 × 10<sup>12</sup> Jones), information encryption, and white light-emitting diodes. In comparison, rare-earth-based A<sub>3</sub>BX<sub>6</sub> perovskites enable high-efficiency electroluminescent devices, featuring deep-blue light-emitting diode with an external quantum efficiency of 7.9%. Moreover, they exhibit superior scintillation performance, including high x-ray light yield (88,800 ph/MeV), low x-ray detection limit (63 nGy/s), and notable γ-ray response under <sup>137</sup>Cs excitation (47,000 ph/MeV; 4.0% energy resolution). These insights highlight the pivotal role of B-site cation engineering in tailoring luminescence mechanisms and enabling multifunctional A<sub>3</sub>BX<sub>6</sub> perovskites for photonic and radiation applications.</p>}},
  author       = {{Zhou, Xin and Yin, Hang and Wei, Qinhua and Chen, Da and Xue, Dongfeng and Pullerits, Tönu and Chen, Junsheng and Qin, Laishun}},
  issn         = {{2096-5168}},
  language     = {{eng}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Research}},
  title        = {{Recent Advances in Cation-Engineered A<sub>3</sub>BX<sub>6</sub> Metal Halide Perovskite for Enhanced Radiative Transition}},
  url          = {{http://dx.doi.org/10.34133/research.1281}},
  doi          = {{10.34133/research.1281}},
  volume       = {{9}},
  year         = {{2026}},
}