光热治疗
材料科学
蒸发
吸收(声学)
分子
化学工程
辐照
光化学
纳米技术
有机化学
复合材料
化学
热力学
物理
工程类
核物理学
作者
Guanyu Chen,Jiangman Sun,Qian Peng,Qiaoyan Sun,Guan Wang,Yuanjing Cai,Xinggui Gu,Zhigang Shuai,Ben Zhong Tang
标识
DOI:10.1002/adma.201908537
摘要
Abstract With recent progress in photothermal materials, organic small molecules featured with flexibility, diverse structures, and tunable properties exhibit unique advantages but have been rarely applied in solar‐driven water evaporation owing to limited sunlight absorption resulting in low solar–thermal conversion. Herein, a stable croconium derivative, named CR‐TPE‐T, is designed to exhibit the unique biradical property and strong π–π stacking in the solid state, which facilitate not only a broad absorption spectrum from 300 to 1600 nm for effective sunlight harvesting, but also highly efficient photothermal conversion by boosting nonradiative decay. The photothermal efficiency is evaluated to be 72.7% under 808 nm laser irradiation. Based on this, an interfacial‐heating evaporation system based on CR‐TPE‐T is established successfully, using which a high solar‐energy‐to‐vapor efficiency of 87.2% and water evaporation rate of 1.272 kg m −2 h −1 under 1 sun irradiation are obtained, thus making an important step toward the application of organic‐small‐molecule photothermal materials in solar energy utilization.
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