非平面太阳能电池的分析装置-物理框架
Analytical Device-Physics Framework for Non-Planar Solar Cells
摘要：
非平面太阳能电池装置已被推广作为一种手段，以提高电流收集的吸收材料与电荷传输的限制。这项工作提出了一个分析框架，用于评估基于材料和几何形状的非平面太阳能电池的最终性能。在这里，pn结的物理分析低注入条件下，当结可以被认为是空间上可分离成准中性和空间电荷区。对于常规平面太阳能电池架构，先前建立的支配载流子传输的一维表达式从本文建立的框架恢复。平面和非平面的几何形状的空间电荷区的复合统计进行比较，显示从空间电荷区产生的复合电流的变化。此外，平面和非平面太阳能电池的性能进行了模拟，基于短路电流的半经验表达式，详细说明了载流子传输和效率的变化作为几何形状的函数，从而产生洞察太阳能电池架构的设计标准。对于这里考虑的条件下，生成速率和总电流的表达式示出普遍支配任何太阳能电池的几何形状，而重组的空间电荷区域内示出直接依赖于的pn结的几何取向。
英文摘要：
Non-planar solar-cell devices have been promoted as a means to enhance current collection in absorber materials with charge-transport limitations. This work presents an analytical framework for assessing the ultimate performance of non-planar solar-cells based on materials and geometry. Herein, the physics of the p-n junction is analyzed for low-injection conditions, when the junction can be considered spatially separable into quasi-neutral and space-charge regions. For the conventional planar solar cell architecture, previously established one-dimensional expressions governing charge carrier transport are recovered from the framework established herein. Space-charge region recombination statistics are compared for planar and non-planar geometries, showing variations in recombination current produced from the space-charge region. In addition, planar and non-planar solar cell performance are simulated, based on a semi-empirical expression for short-circuit current, detailing variations in charge carrier transport and efficiency as a function of geometry, thereby yielding insights into design criteria for solar cell architectures. For the conditions considered here, the expressions for generation rate and total current are shown to universally govern any solar cell geometry, while recombination within the space-charge region is shown to be directly dependent on the geometrical orientation of the p-n junction.
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