Halide perovskite materials have emerged as a potential Si replacement with excellent photovoltaic properties. There has been growing interest in applying halide perovskites to semitransparent and spatially segmented transparent photovoltaics (TPVs) to enable a greater range of deployment routes. However, the continuous-band absorption of these semiconductors prevents near-infrared selective harvesting typically targeted for TPVs with the highest efficiency and transparency needed to meet the aesthetic demands of many potential applications. In this work, we demonstrate TPVs based on perovskite semiconductors where the band gap is sensitively tuned with a range of compositions to selectively harvest only ultraviolet photons with band gaps between 410 and 440 nm. This approach offers theoretical efficiencies up to 7% with >99% visible transparency when precisely targeting band gaps around 435 nm. Practical optimization of these perovskite cells could quickly yield TPVs with power conversion efficiencies rivaling state-of-the-art near-infrared harvesting TPVs today while also providing a route to higher-efficiency multi-junction TPVs.

卤化钙钛矿材料已成为具有优异光伏性能的潜在的硅替代材料。将卤化钙钛矿应用于半透明和空间分段的透明光伏（TPV）的兴趣日益浓厚，以实现更大范围的部署路线。但是，这些半导体的连续带吸收会阻止通常针对TPV的近红外选择性收获，从而具有满足许多潜在应用的美学要求所需的最高效率和透明度。在这项工作中，我们演示了基于钙钛矿半导体的TPV，其中带隙通过一系列成分敏感地调谐，以仅选择性地收获带隙在410和440 nm之间的紫外光子。该方法可提供高达7％的理论效率，其中> 精确对准435 nm附近的带隙时，可见透明性达到99％。这些钙钛矿电池的实际优化可以快速产生具有功率转换效率的TPV，其功率转换效率可以与当今最先进的近红外收获TPV媲美，同时也提供了通往更高效率的多结点TPV的途径。