上转换（UC）纳米材料因其独特的光学特性和在许多不同的应用潜力而引起了

上转换（UC）纳米材料因其独特的光学特性和在许多不同的应用潜力而引起了广泛的关注。本文首次采用电弧放电工艺合成了新型的三维Er3 /Yb3共掺杂AlN（AlN： Yb3 ，Er3）纳米线网络。网络中的分支纳米线表现出非常规则的方向关系：分支的包含角为60或120。纳米线网络的生长机制被提出和详细解释。AlN： Yb3 ，Er3纳米线网络在980 nm激发下表现出微弱的绿色（约523和545nm）和非常强烈的红色（约662 nm）发射，这分别是由Er3离子的2H11/2、4S3/2和4F9/2→4I15/2跃迁引起的。增强的红色发射主要是由于高掺杂浓度引起的交叉弛豫。在298-548 K的较宽温度范围内，红色发射的综合强度随温度呈线性变化，这在光学测温技术中具有潜在的应用前景。

Upconversion (UC) nanomaterials have attracted widespread attention due to their unique optical properties and potential in many different applications. This article is the first to synthesize a novel three-dimensional Er3/Yb3 co doped AlN (AlN: Yb3, Er3) nanowire network using arc discharge technology. The branching nanowires in the network exhibit a very regular directional relationship: the included angles of the branches are 60 or 120. The growth mechanism of nanowire networks has been proposed and explained in detail. AlN: Yb3, Er3 nanowire networks exhibit weak green (approximately 523 and 545 nm) and very strong red (approximately 662 nm) emissions under 980 nm excitation, which are caused by the 2H11/2, 4S3/2, and 4F9/2 → 4I15/2 transitions of Er3 ions, respectively. The enhanced red emission is mainly due to cross relaxation caused by high doping concentration. In the wide temperature range of 298-548 K, the comprehensive intensity of red emission varies linearly with temperature, which has potential application prospects in optical temperature measurement technology.

Up-conversion (UC) nanomaterials have attracted extensive attention due to their unique optical properties and potential applications in many different fields. In this paper, a novel three-dimensional Er3 /Yb3 co-doped AlN(AlN： Yb3, Er3) nanowire network was synthesized by arc discharge process for the first time. The branched nanowires in the network show a very regular directional relationship: the inclusion angle of the branches is 60 or 120. The growth mechanism of nanowire networks is proposed and explained in detail. AlN： Yb3 and Er3 nanowire networks show weak green (about 523 nm and 545nm) and very strong red (about 662 nm) emission under the excitation of 980 nm, which are caused by the 2H11/2, 4S3/2 and 4F9/2→4I15/2 transitions of Er3 ions, respectively. The enhanced red emission is mainly due to the cross relaxation caused by high doping concentration. In the wide temperature range of 298-548 K, the comprehensive intensity of red emission changes linearly with temperature, which has potential application prospects in optical temperature measurement technology.