Experimental study demonstrates a 19% photothermal conversion efficiency in hydrothermally synthesized Chinese purple pigment, highlighting its potential for modern light-to-heat applications.
Chinese purple (CP), an ancient traditional pigment, represents the rich cultural and scientific heritage of an ancient civilization. To achieve high‐purity CP pigment in a more economical and efficient manner, we synthesized CP using a low‐temperature hydrothermal route. Interestingly, we observed the emergence of an emission peak at 894 nm in CP under irradiation at λ ex = 650 nm. Additionally, it was noted that the CP powder exhibited a significant photothermal effect when exposed to near‐infrared light irradiation. A photothermal conversion efficiency of 19% was achieved in the CP pigment. This study not only sheds light on the enigmatic nature of this ancient pigment but also highlights its potential as a critical photothermal conversion material.
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Yang et al. (2024) studied this question.
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