兴奋剂
材料科学
电子
库仑
可见光谱
载流子
吸收(声学)
电导率
有效质量(弹簧-质量系统)
氮化碳
电子迁移率
离子
氮化物
光电子学
光催化
化学
纳米技术
物理
物理化学
有机化学
图层(电子)
量子力学
复合材料
生物化学
催化作用
作者
Guoqiang Zhang,Yangsen Xu,Muhammad Rauf,Jinyu Zhu,Yongliang Li,Chuanxin He,Xiangzhong Ren,Peixin Zhang,Hongwei Mi
标识
DOI:10.1002/advs.202201677
摘要
Most near-infrared (NIR) light-responsive photocatalysts inevitably suffer from low charge separation due to the elevated Coulomb interaction between electrons and holes. Here, an n-type doping strategy of alkaline earth metal ions is proposed in crystalline K+ implanted polymeric carbon nitride (KCN) for visible and NIR photoactivity. The n-type doping significantly increases the electron densities and activates the n→π* 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 1-2 orders of magnitude facilitate the charge transfer and separation. The proposed n-type doping strategy improves the carrier mobility and conductivity, activates the n→π* electron transitions for NIR light absorption, and breaks the limitation of poor charge separation caused by the elevated Coulomb interaction.
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