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<p>The non-uniformly distributed square GaAs nanowire array solar absorbers are inversely designed using the Particle Swarm Optimization algorithm to maximum photoelectric conversion efficiency. The absorption spectra of optimized structures with fixed volume and fixed length all show a flatter trend attributed to the superposition of absorption peaks with different spacing nanowires, and are significantly increased at long wavelengths due to the enhanced trapping effect. The fixed-volume and fixed-length array have diversified distributions, resulting in a performance improvement with remarkable short-circuit current density of 30.80&#xa0;mA/cm<sup>2</sup> and 31.29&#xa0;mA/cm<sup>2</sup> and ultimate efficiency of 33.97% and 34.51%, respectively. In addition, the absorptance exceeds 90% across the wide band range of 300–830&#xa0;nm. This study provides a novel concept for the design of high-performance nanowire array solar photoelectric devices.</p>

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Inverse design of non-uniformly distributed square GaAs nanowire array solar absorbers

  • 期刊论文

  • 发表日期：

    2025年3月28日

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  • Yao Li,
  • Yuqing Liu,
  • Xin Yan,
  • Xueguang Yuan,
  • Yangan Zhang,
  • Jinnan Zhang,
  • Xia Zhang

摘要

The non-uniformly distributed square GaAs nanowire array solar absorbers are inversely designed using the Particle Swarm Optimization algorithm to maximum photoelectric conversion efficiency. The absorption spectra of optimized structures with fixed volume and fixed length all show a flatter trend attributed to the superposition of absorption peaks with different spacing nanowires, and are significantly increased at long wavelengths due to the enhanced trapping effect. The fixed-volume and fixed-length array have diversified distributions, resulting in a performance improvement with remarkable short-circuit current density of 30.80 mA/cm2 and 31.29 mA/cm2 and ultimate efficiency of 33.97% and 34.51%, respectively. In addition, the absorptance exceeds 90% across the wide band range of 300–830 nm. This study provides a novel concept for the design of high-performance nanowire array solar photoelectric devices.