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Monolithic Perovskite/Si Tandem Solar Cells: Pathways to Over 30% Efficiency

机译：整体钙钛矿/硅串联太阳能电池：效率超过30％的途径

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The article commences with a review focusing on three critical aspects of the perovskite/Si tandem technology: the evolution of efficiencies to date, comparisons of Si subcell choices, and the interconnection design strategies. Building on this review, a clear route is provided for minimizing optical losses aided by optical simulations of a recently reported high-efficiency perovskite/Si tandem system, optimizations which result in tandem current densities of approximate to 20 mAcm(-2) with front-side texture. The primary focus is on electrical modeling on the Si-subcell, in order to understand the efficiency potential of this cell under filtered light in a tandem configuration. The possibility of increasing the Si subcell efficiency by 1% absolute is offered through joint improvements to the bulk lifetime, which exceeds 4 ms, and improves surface passivation quality to saturation current densities below 10 fA cm(-2). Polycrystalline-Si/SiOx passivating contacts are proposed as a promising alternative to partial-area rear contacts, with the potential for further simplifying cell fabrication and improving device performance. A combination of optical modeling of the complete tandem structure alongside electrical modeling of the Si-subcell, both with state-of-the-art modeling tools, provides the first complete picture of the practical efficiency potential of perovskite/Si tandems.
机译：本文以钙钛矿/ Si串联技术的三个关键方面为重点进行回顾：迄今为止效率的发展，Si子电池选择的比较以及互连设计策略。在此评论的基础上，通过最近报道的高效钙钛矿/ Si串联系统的光学模拟，提供了一条清晰的路线，可最大程度地减少光学损耗，这些优化导致串联电流密度大约为20 mAcm（-2），前-侧面纹理。主要关注点是在Si子电池上进行电气建模，以了解串联配置的经过过滤的光线下该电池的效率潜力。通过共同提高整体寿命（超过4 ms），可以将Si子电池效率提高1％（绝对值），并将表面钝化质量提高到10 fA cm（-2）以下的饱和电流密度。提出了多晶硅/ Si x钝化接触作为部分区域后接触的有希望的替代方法，具有进一步简化电池制造和改善器件性能的潜力。完整的串联结构的光学建模与Si-subcell的电气建模相结合，再加上最新的建模工具，可以提供钙钛矿/ Si锡合金实际实用潜力的第一张完整图片。

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