Zohar Moshe, Avrahamy Roy, Hava Shlomo, Milgrom Benny, Rimon Evyatar
Electrical and Electronics Engineering Department, Shamoon College of Engineering, P.O. Box 950, Beer Sheva 8410802, Israel.
School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 8410501, Israel.
Polymers (Basel). 2022 Oct 12;14(20):4294. doi: 10.3390/polym14204294.
In this paper, we examine the impact of three-dimensional grating layers embedded at selected locations in an organic solar cell structure to obtain enhanced efficiency. The design, simulations, and optimizations were carried out using an in-house tool based on the rigorous coupled-wave analysis (RCWA) method developed on the MATLAB R2019a platform. An optimal organic solar cell structure design with a top grating layer exhibited an increase of 7.47% in the short-circuit current density compared to an organic solar cell structure with a smooth top layer. The power conversion efficiency (PCE) increase was mainly due to increased light confinement in the thin absorbing layer. Adding an embedded grating layer in the absorption layer resulted in a significant increase in the absorptance spectral bandwidth, where the short-circuit current density increased by 10.88%. In addition, the grating cells yielded a substantial improvement in the cell's conical absorptance since the existence of a surface plasmon polariton (SPP) in the back metal gratings increases the confinement properties. Further, the effect of a pyramid-shaped embedded grating array was a slight improvement in the PCE compared to the rectangular-shaped grating arrays. We showed that a pyramid-grating can act as a nano black-body layer, increasing the absorption for a wide range of azimuthal and polar incident angles.
在本文中，我们研究了嵌入有机太阳能电池结构中选定位置的三维光栅层对提高效率的影响。设计、模拟和优化是使用基于在MATLAB R2019a平台上开发的严格耦合波分析（RCWA）方法的内部工具进行的。与具有光滑顶层的有机太阳能电池结构相比，具有顶部光栅层的最佳有机太阳能电池结构设计在短路电流密度方面提高了7.47%。功率转换效率（PCE）的提高主要是由于薄吸收层中光限制的增加。在吸收层中添加嵌入式光栅层导致吸收光谱带宽显著增加，短路电流密度增加了10.88%。此外，由于背面金属光栅中表面等离激元极化激元（SPP）的存在增加了限制特性，光栅单元使电池的锥形吸收率有了实质性提高。此外，与矩形光栅阵列相比，金字塔形嵌入式光栅阵列对PCE有轻微改善。我们表明，金字塔光栅可以充当纳米黑体层，增加在广泛的方位角和极入射角范围内的吸收。
