Although it exhibits great potential as the rear transparent electrode (RTE) material in semitransparent devices, the ultrathin silver film still faces some significant challenges, such as surface plasmonic effect induced optical loss, the conflict between conductivity and transmittance, and the band level mismatch at device interfaces. In this work, a novel combination of ZrAcac/PEI/Ag/Ta₂O₅ is employed as the RTE of the semitransparent perovskite solar cells in the planar inverted device structure of “indium‐tin‐oxide (ITO)/NiO _x /MAPbI₃/PC₆₁BM/ZrAcac/PEI/Ag/Ta₂O₅.” Interface engineering with ZrAcac/PEI enables a significant increase in the device efficiency for 100 nm thick Ag electrode, from 17.48% to 18.84%. Ultrathin 9 nm Ag film coated on polyetherimide (PEI) exhibits a root‐mean‐square roughness of 0.7 nm and a sheet resistance of 8.7 Ω □⁻¹, which results in the typical device conversion efficiency of 13.40% and an average transmittance (AT) of 43.75% in wavelength region from 500 to 1200 nm simultaneously. That remarkable enhancement in AT from 12.47% to 43.75% can be ascribed to the synergy effect of Ta₂O₅ and the ultrathin silver film in optics. The successful interface engineering of RTE paves an alternative and promising way for high performance semitransparent solar cells, and definitely broadens the scope of their applications.

中文翻译：

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Ta2O5 / Ag /聚醚酰亚胺超光滑薄膜作为高性能半透明钙钛矿太阳能电池的背面透明电极

尽管作为半透明器件中的后透明电极（RTE）材料具有巨大潜力，但超薄银膜仍面临一些重大挑战，例如表面等离激元效应引起的光损耗，电导率和透射率之间的冲突以及谱带不匹配。设备接口。在这项工作中，ZrAcac / PEI / Ag / Ta ₂ O ₅的新颖组合被用作“铟锡氧化物（ITO）/ NiO _x / MAPbI ”的平面倒置器件结构中的半透明钙钛矿太阳能电池的RTE。₃ / PC ₆₁ BM / ZrAcac / PEI / Ag / Ta ₂ O ₅ 。” ZrAcac / PEI的接口工程使100 nm厚的Ag电极的器件效率从17.48％显着提高到18.84％。涂在聚醚酰亚胺（PEI）上的9 nm超薄银膜的均方根粗糙度为0.7 nm，薄层电阻为8.7Ω□ ^-1，这导致典型的器件转换效率为13.40％，平均透射率（AT在500至1200 nm的波长范围内同时达到43.75％）。Ta的显着提高从12.47％增至43.75％可归因于Ta ₂ O ₅的协同作用以及光学领域的超薄银膜。RTE的成功接口工程为高性能半透明太阳能电池铺平了另一种有希望的途径，并且无疑扩大了其应用范围。