Perovskite Solar Cells on the Way to Their Radiative Efficiency Limit – Insights Into a Success Story of High Open-Circuit Voltage and Low Recombination,Advanced Energy Materials

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Perovskite Solar Cells on the Way to Their Radiative Efficiency Limit – Insights Into a Success Story of High Open-Circuit Voltage and Low Recombination
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-03-03 08:20:39 , DOI: 10.1002/aenm.201602358
Wolfgang Tress ₁

Affiliation

Inorganic-organic lead-halide perovskite solar cells have reached efficiencies above 22% within a few years of research. Achieved photovoltages of >1.2 V are outstanding for a material with a bandgap of 1.6 eV – in particular considering that it is solution processed. Such values demand for low non-radiative recombination rates and come along with high luminescence yields when the solar cell is operated as a light emitting diode. This progress report summarizes the developments on material composition and device architecture, which allowed for such high photovoltages. It critically assesses the term “lifetime”, the theories and experiments behind it, and the different recombination mechanisms present. It attempts to condense reported explanations for the extraordinary optoelectronic properties of the material. Amongst those are an outstanding defect tolerance due to antibonding valence states and the capability of bandgap tuning, which might make the dream of low-cost highly efficient solution-processed thin film solar cells come true. Beyond that, the presence of photon recycling will open new opportunities for photonic device design.

中文翻译：

钙钛矿太阳能电池正朝着辐射效率极限的方向发展–高开路电压和低重组的成功案例

在几年的研究中，无机-有机卤化铅钙钛矿太阳能电池的效率已达到22％以上。对于带隙为1.6 eV的材料，所获得的> 1.2 V的光电压是杰出的-特别是考虑到它是经过溶液处理的。当太阳能电池作为发光二极管工作时，这样的值要求低的非辐射复合率，并且伴随着高的发光产量。这份进展报告总结了材料成分和器件架构的发展，这些发展允许出现如此高的光电压。它严格地评估了“寿命”一词，其背后的理论和实验以及目前存在的不同重组机制。它试图使报道的解释解释为材料具有非凡的光电性能。其中，由于抗键合价态和带隙调节能力而导致的出色缺陷容忍度，可能使低成本，高效固溶处理的薄膜太阳能电池的梦想成真。除此之外，光子回收的存在将为光子器件设计带来新的机会。

更新日期：2017-03-22

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