Nanocermet-based solar selective absorbing coatings harvesting solar energy in the form of heat provide deliverable and reliable scheme utilized in Concentrating Solar Power (CSP) system. However, high-temperature instability and pretty high infrared emissivity are still major hurdles on the way towards more demanding applications. Here, we report a hybrid strategy via incorporation of alloy nanoparticles, specific phase-created reflective layer and infrared photon dissipation confinement effect, to realize a target coating stable at 650 °C with record optical performance (an ultralow emissivity of 7.9 %@500 °C and a solar absorptance of 93 % after 300 h vacuum annealing). Such a synergetic enhancement on both the thermal stability and optical performance is mainly ascribed to the outpouring element reservoir in the tri-layer cermet structure with faded infrared extinction volume on the one hand, and phase structure modulation-derived arresting infrared reflectance on the other. More importantly, this work demonstrates significant conceptual and nanotechnology advances into designing and improving such systems.

基于纳米金属陶瓷的太阳能选择性吸收涂料以热能的形式收集太阳能，为聚光太阳能（CSP）系统提供了可交付且可靠的方案。但是，高温不稳定性和相当高的红外发射率仍然是朝着更苛刻的应用发展的主要障碍。在这里，我们报告了一种混合策略，该方法通过掺入合金纳米粒子，特定的相产生的反射层和红外光子耗散限制效应来实现在650°C稳定的目标涂层，并具有创纪录的光学性能（7.9%@500°的超低发射率） C和300 h真空退火后的吸光度为93％。这种热稳定性和光学性能的协同增强主要归因于一方面具有消光的红外消光体积的三层金属陶瓷结构中的倾泻元素储集层，另一方面归因于由相结构调制引起的阻止红外反射率。更重要的是，这项工作证明了在设计和改进此类系统方面在概念和纳米技术方面的重大进步。