Synthesis of transfer-free graphene films on dielectric substrates with controllable thickness via an in-situ co-deposition method for electrochromic devices
Synthesis of transfer-free graphene films on dielectric substrates with controllable thickness via an in-situ co-deposition method for electrochromic devices
复制标题
通过原位共沉积方法在介电基板上合成厚度可控的无转移石墨烯薄膜用于电致变色器件
DOI：
10.1016/j.ceramint.2022.04.156
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发表时间：
2022
影响因子：
5.2
通讯作者：
Gao Tenghua
中科院分区：
文献类型：
--
作者：
Zhang Chitengfei;Cai Yilun;Guo Le;Tu Rong;Zheng Yingqiu;Li Bao-Wen;Zhang Song;Gao Tenghua
石墨烯转移过程中的溶液和聚合物支撑材料会引入大量的杂质、缺陷和褶皱，从而削弱石墨烯的性能。本文采用原位共沉积方法，在多种介质衬底上制备了厚度可控的无转移石墨烯薄膜。将非晶碳（碳源）和铜（催化剂）共沉积在介电衬底上。然后进行原位退火处理，将无定形碳转化为少层石墨烯。较高的共沉积温度可以促进Cu(acac)2前驱体的分解，从而使Cu@C薄膜中的非晶碳层厚度可控。最后，获得了透光率高达93.5%、平方电阻为0.8 kΩ·sq−1的3层、5层、8层和10层石墨烯薄膜，并以3层石墨烯薄膜为电极制备了高性能电致变色器件。电致变色装置的“显色”时间为16.6 s，“漂白”时间为6.8 s，透过率分别为26.8%和79.7%。该方法为批量生产无转移石墨烯薄膜作为电极材料铺平了道路。
The solutions and polymer supported materials in graphene transfer process would introduce lots of containments, defects and wrinkles, which weakens the performance of graphene. Herein, an in-situ co-deposition method is carried out to obtain transfer-free graphene films with controllable thickness on several dielectric substrates. The amorphous carbon (carbon source) and copper (catalyst) are co-deposited on dielectric substrates. Followed by an in-situ annealing process, the amorphous carbon is transformed to few-layer graphene. High co-deposition temperature could promote the decomposition of Cu(acac)2precursors, leading to the controllable thickness of amorphous carbon layer in Cu@C films. Finally, 3-, 5-, 8- and 10- layers graphene films with transmittance of up to 93.5% and square resistance of 0.8 kΩ·sq−1are obtained and a high-performance electrochromic device is fabricated using 3 layers graphene films as electrodes. The “color” and “bleach” time of the electrochromic device is 16.6 s and 6.8 s with the transmittance of 26.8% and 79.7% separately. This method paves an alternative way for the batch production of transfer-free graphene film as electrode materials.