Ideal Photothermal Materials Based on Ge Subwavelength Structure
Photothermal materials often prioritize solar absorption while neglecting thermal radiation losses, which diminishes thermal radiation conversion efficiency. This study addresses this gap by introducing a germanium (Ge) subwavelength structure (SWS) designed to optimize both solar absorption and inf...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-10-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/21/5008 |
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| author | Jingjun Wu Kaixuan Wang Cong Wei Jun Ma Hongbo Xu Wanguo Zheng Rihong Zhu |
| author_facet | Jingjun Wu Kaixuan Wang Cong Wei Jun Ma Hongbo Xu Wanguo Zheng Rihong Zhu |
| author_sort | Jingjun Wu |
| collection | DOAJ |
| description | Photothermal materials often prioritize solar absorption while neglecting thermal radiation losses, which diminishes thermal radiation conversion efficiency. This study addresses this gap by introducing a germanium (Ge) subwavelength structure (SWS) designed to optimize both solar absorption and infrared emissivity. Using a self-masked reactive ion etching (RIE) technique, we achieved a peak absorption of 98.8% within the 300 nm to 1800 nm range, with an infrared emissivity as low as 0.32. Under solar illumination of 1000 W/m<sup>2</sup>, the structure’s temperature increased by 50 °C, generating a heating power of 800 W/m<sup>2</sup>. Additionally, it demonstrated good mechanical and thermal stability at high temperatures and possessed a hydrophobic angle of 132°, ensuring effective self-cleaning. These characteristics make the Ge SWS suitable for application in solar panels, displays, sensors, and other optoelectronic devices. |
| format | Article |
| id | doaj-art-a0f2f013e1204756874c51ef5de5e374 |
| institution | OA Journals |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-a0f2f013e1204756874c51ef5de5e3742025-08-20T02:13:18ZengMDPI AGMolecules1420-30492024-10-012921500810.3390/molecules29215008Ideal Photothermal Materials Based on Ge Subwavelength StructureJingjun Wu0Kaixuan Wang1Cong Wei2Jun Ma3Hongbo Xu4Wanguo Zheng5Rihong Zhu6School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaPhotothermal materials often prioritize solar absorption while neglecting thermal radiation losses, which diminishes thermal radiation conversion efficiency. This study addresses this gap by introducing a germanium (Ge) subwavelength structure (SWS) designed to optimize both solar absorption and infrared emissivity. Using a self-masked reactive ion etching (RIE) technique, we achieved a peak absorption of 98.8% within the 300 nm to 1800 nm range, with an infrared emissivity as low as 0.32. Under solar illumination of 1000 W/m<sup>2</sup>, the structure’s temperature increased by 50 °C, generating a heating power of 800 W/m<sup>2</sup>. Additionally, it demonstrated good mechanical and thermal stability at high temperatures and possessed a hydrophobic angle of 132°, ensuring effective self-cleaning. These characteristics make the Ge SWS suitable for application in solar panels, displays, sensors, and other optoelectronic devices.https://www.mdpi.com/1420-3049/29/21/5008photothermal absorptionsubwavelength structureRIE self-masking technique |
| spellingShingle | Jingjun Wu Kaixuan Wang Cong Wei Jun Ma Hongbo Xu Wanguo Zheng Rihong Zhu Ideal Photothermal Materials Based on Ge Subwavelength Structure Molecules photothermal absorption subwavelength structure RIE self-masking technique |
| title | Ideal Photothermal Materials Based on Ge Subwavelength Structure |
| title_full | Ideal Photothermal Materials Based on Ge Subwavelength Structure |
| title_fullStr | Ideal Photothermal Materials Based on Ge Subwavelength Structure |
| title_full_unstemmed | Ideal Photothermal Materials Based on Ge Subwavelength Structure |
| title_short | Ideal Photothermal Materials Based on Ge Subwavelength Structure |
| title_sort | ideal photothermal materials based on ge subwavelength structure |
| topic | photothermal absorption subwavelength structure RIE self-masking technique |
| url | https://www.mdpi.com/1420-3049/29/21/5008 |
| work_keys_str_mv | AT jingjunwu idealphotothermalmaterialsbasedongesubwavelengthstructure AT kaixuanwang idealphotothermalmaterialsbasedongesubwavelengthstructure AT congwei idealphotothermalmaterialsbasedongesubwavelengthstructure AT junma idealphotothermalmaterialsbasedongesubwavelengthstructure AT hongboxu idealphotothermalmaterialsbasedongesubwavelengthstructure AT wanguozheng idealphotothermalmaterialsbasedongesubwavelengthstructure AT rihongzhu idealphotothermalmaterialsbasedongesubwavelengthstructure |