Zang Jinhao, Jiao Fuhang, Wei Jianyong, Lou Qing, Zheng Guangsong, Shen Chenglong, Deng Yuan, Soheyli Ehsan, Sahraei Reza, Yang Xun, Zang Huaping, Zhou Weimin, Fan Wei, Wang Shaoyi, Dong Lin, Shan Chong-Xin
Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Materials Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, China.
State Key Laboratory of Advanced Optical Communication Systems and Networks, University of Michigan - Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, China.
Nanophotonics. 2023 Oct 10;12(21):4117-4126. doi: 10.1515/nanoph-2023-0578. eCollection 2023 Oct.
Luminescent solar concentrators (LSCs) are attractive for the easy operation and high compatibility with building integrated photovoltaics due to their low cost, large-scale and applicability. However, underutilized sunlight in visible wavelengths often impedes the advance of LSCs. Here, we demonstrate an orange-emitting carbon nanodots-based LSC (O-CDs) with excitation concentrated in the visible wavelengths. The orange-emitting carbon nanodots (O-CDs) with highly localized excitonic emission are prepared via atomic condensation of doped pyrrolic nitrogen, delivering a high photoluminescence quantum yield of 80 % and a suitable Stokes shift with absorption spectrum situated in the visible region. The O-CDs are embedded in polyvinylpyrrolidone to obtain a highly transparent, stable and environmentally friendly O-CDs-based LSC. Thanks to efficient utilization of solar radiation in visible areas and well match between the emission of O-CDs and the response bands of photovoltaic cells, the O-CDs-based LSC reveals an optical conversion efficiency of 5.17 %, superior to that of most carbon nanodots-based LSCs. These results provide an effective strategy to develop carbon-based luminescent concentrated materials for architectural integrated photovoltaic technology.
发光太阳能聚光器（LSCs）因其低成本、大规模和适用性，在操作简便以及与建筑集成光伏的高兼容性方面具有吸引力。然而，可见波长下未被充分利用的阳光常常阻碍发光太阳能聚光器的发展。在此，我们展示了一种基于橙色发光碳纳米点的发光太阳能聚光器（O-CDs），其激发集中在可见波长范围内。通过掺杂吡咯氮的原子缩合制备出具有高度局域化激子发射的橙色发光碳纳米点（O-CDs），其具有80%的高光致发光量子产率以及合适的斯托克斯位移，吸收光谱位于可见光区域。将O-CDs嵌入聚乙烯吡咯烷酮中，以获得高度透明、稳定且环保的基于O-CDs的发光太阳能聚光器。得益于对可见光区域太阳辐射的有效利用以及O-CDs发射与光伏电池响应波段的良好匹配，基于O-CDs的发光太阳能聚光器展现出5.17%的光学转换效率，优于大多数基于碳纳米点的发光太阳能聚光器。这些结果为开发用于建筑集成光伏技术的碳基发光聚光材料提供了一种有效策略。
