A crystalline silicon thin-film solar cell (c-Si TFSC) with a trapezoidal grating is newly introduced and analyzed. The three-dimensional (3D) finite-difference time-domain (FDTD) method is employed to optimize the geometrical parameters of the trapezoidal grating and hence maximize the light absorption. The proposed trapezoidal grating TFSC offers an optical ultimate efficiency ($\eta$) of 32.3%, with an enhancement of 81% relative to the conventional TFSC. The light absorption enhancement within wavelength range (300–1100 nm) is based on the diffraction grating, which supports Bloch modes through the suggested solar cell. The electrical characteristics of the proposed design are also studied using the finite-element method. The cell doping concentration, junction thickness, and recombination process are also investigated to further enhance the power conversion efficiency (PCE). The reported design offers a short circuit current density ${J_{{\rm sc}}}$ of ${24.8}\;{{\rm mA/cm}^2}$ and PCE of 12.5% with an improvement of 83% over the conventional TFSC.

中文翻译：

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高效SiO ₂梯形光栅薄膜太阳能电池

新引入并分析了具有梯形光栅的晶体硅薄膜太阳能电池（c-Si TFSC）。三维（3D）有限差分时域（FDTD）方法用于优化梯形光栅的几何参数，从而使光吸收最大化。拟议的梯形光栅TFSC可提供光学极限效率（$ \ eta $）为32.3％，与传统的TFSC相比提高了81％。波长范围（300–1100 nm）内的光吸收增强是基于衍射光栅的，该衍射光栅通过建议的太阳能电池支持Bloch模式。还使用有限元方法研究了所提出设计的电气特性。还研究了电池掺杂浓度，结厚度和重组工艺，以进一步提高功率转换效率（PCE）。报告的设计提供了短路电流密度$ {J _ {{\ rm sc}}} $ of $ {24.8} \; {{\ rm mA / cm} ^ 2} $和PCE为12.5％，改进了83 ％超过传统的TFSC。