Penta-graphene, a two-dimensional (2D) metastable carbon allotrope, has been proposed by composing entirely of carbon pentagons. In this work, we have proposed heterojunctions composed of penta-graphene nanoribbons (penta-GNRs) and penta-B₂N₄ nanoribbons, the different edge states: bare, H or Cl atoms passivation is considered, respectively. Using the spin-polarized density functional theory (DFT) and the non-equilibrium Green's function (NEGF) method, the band structures and electronic transport properties of the heterojunctions have been calculated. Our results show that an indirect band gap appears in the band structures of the penta-GNRs, and that a metal property occurs in the penta-B₂N₄ nanoribbons. The spin-splitting, spin-filtering and negative differential resistance (NDR) effects are occurred in the heterojunction with bare edges. We also find that the unidirectional conductivity occurs in the heterojunction with H atoms passivation. And the bipolar spin-filtering effect can be observed in the heterojunction with Cl atoms passivation.

五角石墨烯是一种二维（2D）亚稳态碳同素异形体，已通过完全由碳五边形组成而提出。在这项工作中，我们提出了由五-石墨烯纳米带（penta-GNR）和五-B ₂ N ₄纳米带组成的异质结，分别考虑了不同的边缘状态：裸原子，H原子或Cl原子钝化。利用自旋极化密度泛函理论（DFT）和非平衡格林函数（NEGF）方法，计算了异质结的能带结构和电子输运性质。我们的结果表明，在五-GNR的能带结构中出现了间接带隙，并且在五-B ₂ N _4中出现了金属性质。纳米带。在具有裸露边缘的异质结中会发生自旋分裂，自旋滤波和负差分电阻（NDR）效应。我们还发现，单向导电性发生在具有H原子钝化的异质结中。在具有Cl原子钝化的异质结中可以观察到双极自旋过滤效应。