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Here, an n\u2010type doping strategy of alkaline earth metal ions is proposed in crystalline K<jats:sup>+<\/jats:sup> implanted polymeric carbon nitride (KCN) for visible and NIR photoactivity. The n\u2010type doping significantly increases the electron densities and activates the n\u2192<jats:italic>\u03c0<\/jats:italic>* electron transitions, producing NIR light absorption. In addition, the more localized valence band (VB) and the regulation of carrier effective mass and band decomposed charge density, as well as the improved conductivity by 1\u20132 orders of magnitude facilitate the charge transfer and separation. The proposed n\u2010type doping strategy improves the carrier mobility and conductivity, activates the n\u2192<jats:italic>\u03c0<\/jats:italic>* electron transitions for NIR light absorption, and breaks the limitation of poor charge separation caused by the elevated Coulomb interaction.<\/jats:p>","DOI":"10.1002\/advs.202201677","type":"journal-article","created":{"date-parts":[[2022,6,2]],"date-time":"2022-06-02T03:34:30Z","timestamp":1654140870000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":66,"title":["Breaking the Limitation of Elevated Coulomb Interaction in Crystalline Carbon Nitride for Visible and Near\u2010Infrared Light Photoactivity"],"prefix":"10.1002","volume":"9","author":[{"given":"Guoqiang","family":"Zhang","sequence":"first","affiliation":[{"name":"College of Chemistry and Environmental Engineering Shenzhen University  Shenzhen Guangdong 518060 P. R. 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