Hot carrier solar cells could achieve efficiencies exceeding the Shockley–Queisser limit by collecting hot carriers before they cool down. With the hot-phonon bottleneck effect, hot carrier collection may be favorable at high carrier densities in concentrator photovoltaics. In this work, utilizing the excellent thermal stability of a phthalocyanine (Pc) hole transport layer (HTL), we constructed a hot hole collecting HTL. A methylthiotriphenylamine-based SMePc achieved an extraction velocity of 78 900 cm s⁻¹, corresponding to a collecting distance of ∼79 nm. With this HTL, an efficiency of 24.95% and certified efficiency of 24.43% are achieved under 1 sun illumination with over 3000 h operational stability in N₂ (60 °C) and over 1000 h at 85 °C. With a solar concentrator, an increase in open-circuit voltage (V_OC) above the theoretical cold carrier line is observed, and a record efficiency of 27.30% is achieved under 5.9 sun illumination for a single-junction perovskite solar cell. Our strategy demonstrated the potential application of high-efficiency hot carrier solar cells.

中文翻译：

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通过酞菁衍生物的超快热空穴传输实现效率超过 27% 的热载流子钙钛矿太阳能电池


热载流子太阳能电池可以通过在冷却之前收集热载流子来实现超过肖克利-奎瑟极限的效率。由于热声子瓶颈效应，热载流子收集在聚光光伏发电中在高载流子密度下可能是有利的。在这项工作中，我们利用酞菁（Pc）空穴传输层（HTL）优异的热稳定性，构建了热空穴收集HTL。基于甲硫基三苯胺的 SMePc 的萃取速度为 78 900 cm s ⁻¹ ，对应于~79 nm 的收集距离。借助该 HTL，在 1 个太阳光照下可实现 24.95% 的效率和 24.43% 的认证效率，在 N ₂ (60 °C) 下运行稳定性超过 3000 小时，在 85 °C 下运行稳定性超过 1000 小时。使用太阳能聚光器，观察到开路电压 (V _OC ) 高于理论冷载流子线，并且单结钙钛矿在 5.9 太阳光照下实现了 27.30% 的记录效率太阳能电池。我们的策略证明了高效热载流子太阳能电池的潜在应用。