Highly efficient all-perovskite photovoltaic-powered battery with dual-function viologen for portable electronics
Jie Gong, Danpeng Gao, Hang Zhang, Xiongyi Liang, Bo Li, Qi Liu, Liangchen Qian, Xintong Li, Xin Wu, Chunlei Zhang, Zexin Yu, Francesco Vanin, Xiao Cheng Zeng, Nan Li, Feng Xu, Chunyi Zhi, Zonglong Zhu
Abstract
Photovoltaic-powered batteries offer a promising integrated solution for sustainable energy in portable electronics, yet conventional designs face challenges in integration, miniaturization, and flexibility. We address this through a dual-functional, material-sharing strategy using ethyl viologen diiodide to achieve synergistic performance enhancement in photovoltaic-powered batteries. The ethyl viologen diiodide-modified perovskite solar cells exhibit 26.11% efficiency and retain 96.2% of their original performance after 1000 h of continuous use. Batteries employing ethyl viologen diiodide-derived perovskitoid cathodes show 296.1 mAh g−1 at 0.5 A g−1, with a capacity retention of 89% after 10,000 cycles at 5 A g−1. The resulting all-perovskite-based integrated devices show an overall energy conversion efficiency of 18.54%, with flexible versions achieving 17.62% efficiency and stable photo-charging/discharging cyclability over 100 cycles. These flexible devices reliably power a wearable glucose monitor in intelligent control mode for 24 h, demonstrating their potential for next-generation portable electronics applications. Gong et al. report an all-perovskite photovoltaic-powered battery using ethyl viologen diiodide and its derivative to modify the perovskite solar cell and the battery cathode, enabling an overall energy conversion efficiency of 18.54%. The flexible version powers a wearable glucose monitor for 24 h.