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Measurement of the Photothermal Conversion Efficiency of CNT Films Utilizing a Raman Spectrum.

ABSTRACT: Because carbon nanotube (CNT) films have high photothermal conversion efficiency (PTCE), they have been widely used in bolometric and photothermoelectric photodetectors, seawater desalination, and cancer therapy. Here, we present a simple, quick, and non-destructive method to measure the PTCE of CNT films. According to the linear relationship between the Raman shift of the G+ peak and the temperature of a CNT, the offset of the G+ peak under varying excitation light power can characterize the changed temperature. Combining the simulation of the temperature distribution, the final value of the PTCE can be obtained. Finally, a CNT film with a high PTCE was chosen to be fabricated as a bolometric photodetector; a quite high responsivity (2 A W-1 at 532 nm) of this device demonstrated the effectiveness of our method.

SUBMITTER: Liu Y

PROVIDER: S-EPMC9000262 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature

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Measurement of the Photothermal Conversion Efficiency of CNT Films Utilizing a Raman Spectrum.

Liu Yu Y Lin Zhicheng Z Wang Pengfei P Huang Feng F Sun Jia-Lin JL

Nanomaterials (Basel, Switzerland) 20220327 7

Because carbon nanotube (CNT) films have high photothermal conversion efficiency (PTCE), they have been widely used in bolometric and photothermoelectric photodetectors, seawater desalination, and cancer therapy. Here, we present a simple, quick, and non-destructive method to measure the PTCE of CNT films. According to the linear relationship between the Raman shift of the G<sup>+</sup> peak and the temperature of a CNT, the offset of the G<sup>+</sup> peak under varying excitation light power c ...[more]

PMID: 35407219

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