Key Laboratory of Material Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
Nanoscale Res Lett. 2014 May 14;9(1):238. doi: 10.1186/1556-276X-9-238. eCollection 2014.
An optical simulation of poly(3-hexylthiophene) (P3HT)/Si nanowire array (NWA) hybrid solar cells was investigated to evaluate the optical design requirements of the system by using finite-difference time-domain (FDTD) method. Steady improvement of light absorption was obtained with increased P3HT coating shell thickness from 0 to 80 nm on Si NWA. Further increasing the thickness caused dramatic decrease of the light absorption. Combined with the analysis of ultimate photocurrents, an optimum geometric structure with a coating P3HT thickness of 80 nm was proposed. At this structure, the hybrid solar cells show the most efficient light absorption. The optimization of the geometric structure and further understanding of the optical characteristics may contribute to the development for the practical experiment of the promising hybrid solar cells.
采用时域有限差分（FDTD）方法对聚 3-己基噻吩（P3HT）/硅纳米线阵列（NWA）杂化太阳能电池进行了光学模拟，以评估该系统的光学设计要求。通过增加 P3HT 涂层壳厚度从 0 到 80nm，在 Si NWA 上获得了稳定的光吸收增强。进一步增加厚度会导致光吸收的急剧下降。结合最终光电流的分析，提出了一种具有 80nm 涂层 P3HT 厚度的最佳几何结构。在这种结构下，杂化太阳能电池表现出最高效的光吸收。这种几何结构的优化以及对光学特性的进一步理解可能有助于有前途的杂化太阳能电池的实际实验的发展。
