Quantum-wire intermediate-band solar cells (QW IBSCs) are good candidates for breaking the Shockley-Queisser limit; however, there are a few studies of them. In this paper, we derive the fundamental limiting efficiency (FLE), the theoretical upper limit of the power-conversion efficiency, for QW IBSCs by calculation of the intrinsic loss. To achieve this, based on a photon-electron detailed-balance principle, the intrinsic loss components (ILCs) are modeled in the QW IBSCs by our considering photon absorption and emission for two transverse directions of confined carriers and for a longitudinal direction of free carriers in the QWs. Furthermore, the ILCs and FLE are investigated in an experimental reported structure of an ${\mathrm{In}}_x{\mathrm{Ga}}_{1-x}\mathrm{As}/\mathrm{Ga}\mathrm{As}$ QW IBSC. For this purpose, the two-dimensional Schrödinger equation and the Bloch approximation are used to obtain the placement and width of the intermediate band, respectively. Besides, the effect of changing the indium content, the diagonal length, and the period of QWs, which is a way to engineer the placement and width of the intermediate band and consequently the ILCs and FLE, on the FLE of ${\mathrm{In}}_x{\mathrm{Ga}}_{1-x}\mathrm{As}/\mathrm{Ga}\mathrm{As}$ QW IBSCs is examined.

中文翻译：

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量子线中带太阳能电池的基本极限效率和固有损耗成分

量子线中带太阳能电池（QW IBSC）是打破肖克利-奎塞尔极限的很好的选择。但是，有一些研究。在本文中，我们通过计算本征损耗来推导QW IBSC的基本极限效率（FLE），即功率转换效率的理论上限。为此，基于光子电子详细平衡原理，通过考虑约束载流子的两个横向方向和自由载流子的纵向方向的光子吸收和发射，在QW IBSC中对本征损耗分量（ILC）进行建模在QW中。此外，ILC和FLE在实验报告的结构中进行了研究。${在}_X{嘎}_{\mathrm{1个}-X}如/嘎如$QW IBSC。为此，使用二维Schrödinger方程和Bloch近似分别获得中间带的位置和宽度。此外，改变铟含量，对角线长度和量子阱周期的影响，这是一种设计中间带的布局和宽度以及ILC和FLE的方式，可以改变铟的含量。${在}_X{嘎}_{\mathrm{1个}-X}如/嘎如$ QW IBSC被检查。