A novel self‐charging platform is proposed using colloidal‐quantum‐dot (CQD) photovoltaics (PVs) via the near‐infrared (NIR) band for low‐power electronics. Low‐bandgap CQDs can convert invisible NIR light sources to electrical energy more efficiently than wider spectra because of reduced thermalization loss. This energy‐conversion strategy via NIR photons ensures an enhanced photostability of the CQD devices. Furthermore, the NIR wireless charging system can be concealed using various colored and NIR‐transparent fabric or films, providing aesthetic freedom. Finally, an NIR‐driven wireless charging system is demonstrated for a wearable healthcare bracelet by integrating a CQD PVs receiver with a flexible lithium‐ion battery and entirely embedding them into a flexible strap, enabling permanent self‐charging without detachment.

中文翻译：

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通过近红外波段的基于胶体量子点的自充电系统

提出了一种通过近红外（NIR）波段使用胶体量子点（CQD）光伏（PV）的新型自充电平台，用于低功率电子设备。低带隙CQD可以降低可见光的热损失，因此比宽光谱能更有效地将不可见的NIR光源转换为电能。这种通过NIR光子进行的能量转换策略可确保CQD设备的光稳定性更高。此外，NIR无线充电系统可以使用各种有色和NIR透明的织物或薄膜隐藏起来，从而提供美观的自由度。最后，通过将CQD PVs接收器与柔性锂离子电池集成在一起并将其完全嵌入柔性带中，展示了用于可穿戴保健手环的NIR驱动无线充电系统，可实现永久性自充电而不会脱落。