Electronically controlled infrared radiation of graphite thin films with crumpled surfaces

Su, Jinchao; Ding, Pei; Wang, Pei; Mao, Bo; Ren, Mengshuai; Xu, Kun; Zeng, Fang; Wang, Junqiao

doi:10.1016/j.diamond.2023.109848

Cited by 3 publications

(1 citation statement)

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“…During the preparation and transfer process, the growth substrate and target transfer substrate can affect the morphology and structure of graphene films, such as the formation of various wrinkles or folds [14,15]. Meaningfully, twodimensional materials with these surface defects can exhibit many new physical properties in comparison to their flat counterparts [15,16]. It has been found that the mechanical, electrical and thermal properties of graphene films can be tuned facilely by transferring them onto some preprocessed target substrates, such as substrates with ordered microstructures [17,18], pre-stretched polymeric substrates [19,20], and thermally induced shrinkable substrates [21].…”

Section: Introductionmentioning

confidence: 99%

Improvement of electrothermal and photothermal properties of ultra-thin graphite film on oxygen plasma-treated polyimide substrate

Ren,

Mao,

Ding

et al. 2024

Nanotechnology

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Graphene and its derivatives are widely used in the field of energy conversion and management due to their excellent physical and chemical properties. In this paper, ultra-thin graphite film (GF) with thickness of 100-150 nm prepared by chemical vapor deposition (CVD) was transferred to oxygen plasma-treated polyimide (PI) substrate as flexible heating film. The electrothermal and photothermal properties of GF on PI substrates with different treatment time were studied. The experimental results show that the PI substrate pretreated by oxygen plasma can change the surface morphology of GF, increase its electrical conductivity and light absorption capacity, and significantly improve the electrothermal and photothermal properties of GF heater. Under the low applied voltage of 5V (power density of 0.81W/cm2), the surface temperature of GF on 40 mins plasma-treated PI substrate can rise to 250 ℃, which is nearly 50 ℃ higher than that of GF on untreated PI substrate. When 100 nm thick commercial multilayer graphene film (MLG) is used, plasma-treated PI substrate can increase the electric heating temperature of MLG by 70 ℃. In terms of photothermal performance, the surface temperature of GF on 50 mins plasma-treated PI substrate can reach 73 ℃ under one sun irradiation, which is 8 ℃ higher than that on untreated substrate. The experimental results are in good agreement with the simulation research. Our strategy has important implications for the development of efficient and energy-saving graphene/graphite-based heating films for advanced electrothermal and photothermal conversion devices.

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