We studied the excitonic states of KP₁₅ nanowires, which have high carrier mobility and in-plane anisotropic electrical and optical properties. Power, thickness, and temperature-dependent photoluminescence (PL) measurements were carried out. We found two neutral exciton emissions from KP₁₅ nanowires. The high energy emission (1.83 eV) seems to have been produced by the surface state, and the lower one (1.67 eV) may have been produced by the original crystal structure of KP₁₅. The KP₁₅ nanowires also exhibited a large exciton binding energy (98 meV), which is one order of magnitude greater than those of common semiconductors. These properties make KP₁₅ nanowires an interesting material for electrical and optical applications.

中文翻译：

---

准一维分层KP的激子发射₁₅ †

我们研究了具有高载流子迁移率以及面内各向异性电学和光学特性的KP ₁₅纳米线的激子态。进行了功率，厚度和温度相关的光致发光（PL）测量。我们从KP ₁₅纳米线中发现了两种中性激子发射。高能量发射（1.83 eV）似乎是由表面状态产生的，而较低的能量发射（1.67 eV）可能是由KP ₁₅的原始晶体结构产生的。KP ₁₅纳米线还表现出大的激子结合能（98 meV），比普通半导体的激子结合能大一个数量级。这些特性使KP ₁₅ 纳米线是用于电气和光学应用的有趣材料。