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| Research on the Aging Properties of Single-Walled Carbon Nanotubes Transparent Conductive Thin Films Suitable for Electrostatic Dust Removal of Photovoltaic Panels |
| Liu Yunpeng1, Li Haoyi1, Li Le1, Yin Xiaoxuan1, Wu Xinyue1, Zhou Songsong2 |
1. Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment North China Electric Power University Baoding 071003 China;
2. China Electric Power Research Institute Beijing 100192 China |
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Abstract In recent years, the use of transparent conductive film as the photovoltaic (PV) panel surface materials, while the high-voltage electrodes placed above the PV panel, which makes the dust particles charged and jump from the surface of the PV panel under the action of electrostatic force, to realize the PV panels to effectively remove the dust of the new electrostatic dust removal method has gradually become a hotspot in the research. Based on the application requirements of electrostatic dust removal of PV panels, single-walled carbon nanotubes (SWCNTs) transparent conductive films are prepared, and aging experiments of SWCNTs transparent conductive films are carried out on the experimental platforms of photoaging, salt-fog aging, high temperature aging, and high-low temperature aging for 2 000 h.
The research results indicate that the types of aging that have the most significant effect on the transmittance and haze of the SWCNTs transparent conductive films are photoaging and salt-fog aging, respectively, with the transmittance of the films decreasing to 90.39% and the haze increasing to 4.98% after 2 000 h aging. The effect of high temperature aging and high-low temperature aging on the sheet resistance of the film is small, and the sheet resistance of the film after aging is 8.418×104 Ω/□ and 8.633×104 Ω/□, respectively, whereas the sheet resistance of the film due to photoaging and salt-fog aging rise to 4.753×105 Ω/□ and 9.337×105 Ω/□, respectively. In addition, both the water contact angle and the glycol contact angle of the SWCNTs transparent conductive films increase with increasing aging time.
The structure and morphology of the SWCNTs transparent conductive films don’t change significantly during photoaging, high temperature aging, and high-low temperature aging, whereas salt-fog aging causes multi-area and large-area film detachment. From the application effect of aging film in electrostatic dust removal of PV panels, the rise of sheet resistance doesn’t significantly affect the dust removal effect, but the film detachment causes a significant decrease in the dust removal rate. Compared to the electrostatic dust removal rate of 98.35% before aging, the electrostatic dust removal rate after photoaging, high temperature aging, and high-low temperature aging slightly decrease, reaching 97.52%, 97.71%, and 97.63%, respectively. However, the electrostatic dust removal rate significantly decreases to 81.76% after salt-fog aging.
The change of quality factor of SWCNTs transparent conductive films with aging time has obvious time series characteristics, and the autoregressive integrated moving average (ARIMA) model can be used to predict the quality factor of SWCNTs transparent conductive films in different scenarios and the application life. According to experimental and predictive results, the longest service life of SWCNTs transparent conductive films under the conditions of photoaging, salt-fog aging, high temperature aging, and high-low temperature aging described in this article are 2 300 h, 1 000 h, 2 900 h, and 3 000 h, respectively.
The SWCNTs transparent conductive films prepared in this paper are characterized by high resistance and high transmittance, as well as excellent resistance to photoaging, high temperature aging, and high-low temperature aging, and are expected to be further applied in devices such as displays, sensors, touch screens, and light-emitting diodes.
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Received: 26 January 2024
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2025, Vol. 40 
