Efficient solar-driven photothermoelectric generator facilitated by carbon dots aggregates

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-04-21 DOI:10.1016/j.nanoen.2025.111053

Feishi Shan , Li Yan , Zhihong Wei , Chengshuang Liao , Jing Li , Zhouyu Wang , Yuxi Tian , Leyong Wang

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Abstract

The energy crisis is a significant issue that the world is facing in the 21st century. Thermoelectric energy transfer emerges as a promising solution that can convert heat energy into electric energy. However, there remains a big challenge that the efficient utilization of light energy to achieve continuous electricity ultimately. The red emitting carbon dots (RCDs) could self-assemble into the aggregates (ARCDs) via cooperative solvophobic effect combined with hydrogen bonding interaction, which exhibits considerably enhanced absorption with excellent photothermal conversion effect (PCE ≈ 62%) compared to its dispersed state. Moreover, these aggregates were then loaded onto semiconductors to create solar-driven photothermoelectric generator (LHE), with unprecedented output efficiency (V_output ≈ 5000 mV, I_output ≈ 25 mA, and P_output ≈ 123 mW), which can easily charge smartphones outdoors. This work offers a supramolecular chemistry perspective for the construction of CDs aggregates and presents an sustainable approach towards achieving continuous photothermoelectric energy transfer.

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由碳点聚集体促成的高效太阳能驱动光热电发电机

能源危机是21世纪世界面临的一个重大问题。热电能量传递是一种很有前途的将热能转化为电能的解决方案。然而，如何有效利用光能来实现最终的连续供电仍然是一个很大的挑战。红碳点（RCDs）通过协同疏溶剂效应和氢键相互作用自组装成聚集体（ARCDs），与分散态相比，具有显著增强的吸收能力和良好的光热转换效应（PCE≈62%）。此外，这些聚集体随后被加载到半导体上，以制造太阳能驱动的光热电发电机（LHE），具有前所未有的输出效率（Voutput≈5000 mV, Ioutput≈25 mA, Poutput≈123 mW），可以轻松地在户外为智能手机充电。这项工作为CDs聚集体的构建提供了一个超分子化学的视角，并提出了一种实现连续光热电能量转移的可持续方法。

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.