Solar energy as an inexhaustible source of clean energy has attracted more and more attention. As an important way to collect source of energy, solar absorber is widely reported and studied. However, how to efficiently absorb the solar energy in the solar radiation range is a long-term perplexing problem. In this work, we propose a new type of broadband solar energy absorber based on monolayer molybdenum disulfide (MoS₂). Tungsten (W) elliptical arrays are introduced into the structure to enhance its absorption. By exciting local surface plasmon resonance (LSPR) between monolayer MoS₂ and tungsten elliptical arrays, ultra-broadband solar energy absorber with high absorption rate is obtained. Theoretical calculation by a finite-difference time-domain method (FDTD) shows that absorption with a bandwidth of 1750 nm from about 280 nm to 2030 nm has been achieved. The peak values of resonance wavelength at 1275 nm and 1885 nm are both greater than 99%. Our absorber also has good polarization independence and incidence insensitivity, which provides a theoretical basis for its work in the actual solar environment and possibilities for its application in other solar devices. The inspiration for proposed absorber can also be applied to other transition-metal dichalcogenides (TMDCs).

太阳能作为一种取之不尽的清洁能源，已引起越来越多的关注。作为收集能源的重要方式，太阳能吸收器得到了广泛的报道和研究。但是，如何有效地吸收太阳辐射范围内的太阳能是一个长期的难题。在这项工作中，我们提出了一种基于单层二硫化钼（MoS ₂）的新型宽带太阳能吸收器。钨（W）椭圆形阵列被引入该结构以增强其吸收。通过激发单层MoS ₂之间的局部表面等离子体共振（LSPR）以及钨椭圆阵列，获得了吸收率高的超宽带太阳能吸收体。通过时域有限差分法（FDTD）的理论计算表明，已实现了从280 nm到2030 nm带宽为1750 nm的吸收。在1275nm和1885nm处的共振波长的峰值均大于99％。我们的吸收器还具有良好的极化独立性和入射不敏感性，这为其在实际太阳能环境中的工作提供了理论基础，并为其在其他太阳能设备中的应用提供了可能性。拟议中的吸收剂的灵感也可以应用于其他过渡金属二卤化物（TMDC）。