Jiang Chen, Wu Meiyan, Zhang Fang, Liu Chao, Sun Mingliang, Li Bin
School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China.
CAS Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
Nanomaterials (Basel). 2023 Mar 29;13(7):1221. doi: 10.3390/nano13071221.
Tunicate nanocellulose with its unique properties, such as excellent mechanical strength, high crystallinity, and good biodegradability, has potential to be used for the preparation of light management film with tunable transmittance and haze. Herein, we prepared a whole tunicate cellulose film with tunable haze levels, by mixing tunicate microfibrillated cellulose (MFC) and tunicate cellulose nanofibrils (CNF). Then, the obtained whole tunicate cellulose film with updated light management was used to modify the organic solar cell (OSC) substrate, aiming to improve the light utilization efficiency of OSC. Results showed that the dosage of MFC based on the weight of CNF was an important factor to adjust the haze and light transmittance of the prepared cellulose film. When the dosage of MFC was 3 wt.%, the haze of the obtained film increased 74.2% compared to the pure CNF film (39.2%). Moreover, the optimized tunicate cellulose film exhibited excellent mechanical properties (e.g., tensile strength of 168 MPa, toughness of 5.7 MJ/m) and high thermal stability, which will be beneficial to the workability and durability of OSC. More interestingly, we applied the obtained whole tunicate cellulose film with a high haze (68.3%) and high light transmittance (85.0%) as an additional layer to be adhered to the glass substrate of OSC, and a notable improvement (6.5%) of the power conversion efficiency was achieved. With the use of biodegradable tunicate cellulose, this work provides a simple strategy to enhance light management of the transparent substrate of OSC for improving power conversion efficiency.
被囊动物纳米纤维素具有独特的性能，如优异的机械强度、高结晶度和良好的生物降解性，有潜力用于制备具有可调透射率和雾度的光管理薄膜。在此，我们通过混合被囊动物微纤化纤维素（MFC）和被囊动物纤维素纳米纤丝（CNF）制备了具有可调雾度水平的全被囊动物纤维素薄膜。然后，将获得的具有更新光管理性能的全被囊动物纤维素薄膜用于修饰有机太阳能电池（OSC）基板，旨在提高OSC的光利用效率。结果表明，基于CNF重量的MFC用量是调节所制备纤维素薄膜雾度和透光率的重要因素。当MFC用量为3 wt.%时，所得薄膜的雾度比纯CNF薄膜（39.2%）增加了74.2%。此外，优化后的被囊动物纤维素薄膜表现出优异的机械性能（例如，拉伸强度为168 MPa，韧性为5.7 MJ/m³）和高热稳定性，这将有利于OSC的可加工性和耐久性。更有趣的是，我们将获得的具有高雾度（68.3%）和高透光率（85.0%）的全被囊动物纤维素薄膜作为附加层粘附到OSC的玻璃基板上，实现了功率转换效率的显著提高（6.5%）。通过使用可生物降解的被囊动物纤维素，这项工作提供了一种简单的策略来增强OSC透明基板的光管理，以提高功率转换效率。
