Tin perovskite solar cells (PSCs) have been attracting attention in photovoltaic application, while the performance of Sn PSCs, especially for hole-transporting materials (HTMs)-free configuration, is relatively poor because of short mean-free-path for photogenerated charge carriers. We report a p–n junction with spatially appropriate architecture and energetic alignment in perovskite light-absorbing layer, resulting in an excellent performance of HTM-free Sn PSCs with a power conversion efficiency (PCE) of 5.17%, the highest value reported in HTM-free Sn PSCs. The p–n junction configuration plays a key role in achieving high efficiency and realizing excellent stability for more than 200 h operation.

中文翻译：

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钙钛矿的垂直2D / 3D异质结，用于高效无HTM的钙钛矿太阳能电池

钙钛矿型太阳能电池（PSC）在光伏应用中引起了人们的关注，而Sn PSC的性能，尤其是无空穴传输材料（HTM）的配置，由于光生电荷载流子的平均自由程短而相对较差。 。我们报告了钙钛矿光吸收层中具有适当空间结构和高能排列的ap–n结，从而导致无HTM的Sn PSC的出色性能，功率转换效率（PCE）为5.17％，这是HTM-中报道的最高值免费的Sn PSC。p–n结配置在200个小时以上的运行中实现高效率并实现出色的稳定性方面发挥着关键作用。