透明导电纤维素薄膜的制备及其在染料敏化太阳能电池中的应用
发布时间：2018-12-18 15:02
【摘要】：染料敏化太阳能电池是利用太阳能转化成电能的电子器件,是目前人们利用清洁能源有效方法之一。透明导电基底作为电子器件核心部分,对染料敏化太阳能电池性能起着重要的作用。因纤维素具有来源丰富、价格低廉、可生物降解、可绕曲性等优点,纤维素有望取代塑料、玻璃等材料,制备纤维素基底材料的新一代"绿色"电子器件将成为国内外研究的热点。本文以溶解浆为原料,采用NMMO(N-甲基吗啉-N-氧化物)为溶剂,制备透明纤维素薄膜;并以透明薄膜为基底,通过磁控溅射技术制备透明导电纤维素薄膜;以透明导电纤维素薄膜作为太阳能电池的电极,制备染料敏化太阳能电池。分析纤维素的浓度、溶解时间、溶解温度等因素对纤维素薄膜性质的影响,优化透明纤维素薄膜制备工艺。研究结果表明,在纤维素浓度为7%、溶解温度110℃、凝固浴温度25℃的为最佳制备工艺条件下,能制备出较高透光率和机械强度的纤维素薄膜,纤维素薄膜的透光率为85.4%,拉伸强度为36.9MPa,断裂伸缩率为11.6%;在210℃以的高温环境下,纤维素薄膜仍具有良好的透光率和热稳定性;在酸性碱性环境下,纤维素薄膜具有较好的耐酸耐碱性能。采用高真空磁控溅射技术将导电物质银(Ag)溅射至纤维素薄膜上,制备导电Ag/纤维素复合膜。结果表明,在溅射时间45s、溅射功率50W和溅射氩气流量50sccm的最佳制备工艺条件下,Ag/纤维素复合膜具有良好的导电性能,方块电阻低至7.8Ω/□,Ag/纤维素复合膜透光率偏低,可见光平均透光率为51.3%;由扫描电子显微镜和原子力显微镜图可知,Ag/纤维素复合膜是由岛状的Ag粒子缓慢地团簇成致密的Ag层覆盖至纤维素薄膜表面而形成的。采用高真空磁控溅射技术,将ITO溅射至纤维素薄膜上,制备透明导电的ITO/纤维素复合膜。结果表明,在溅射时间3h、溅射功率110W、溅射压强3Pa和溅射温度120℃的最佳制备工艺条件下,ITO/纤维素复合膜具有良好的导电性能和高的透光率,方块电阻低至10.5Ω/□,可见光平均透光率为72.8%;由扫描电子显微镜和原子力显微镜图可知,ITO/纤维素复合膜具有较好的致密性和平整度。与Ag/纤维素导电膜相比,ITO/纤维素导电膜具有良好的电学性能和光学性能,其性质可满足染料敏化太阳能电池的基底要求。以ITO/纤维素导电膜作为染料敏化太阳能电池的光电极和对电极,建构以N79作为染料的染料敏化太阳能电池,分析染料敏化太阳能电池的光电学性能。研究结果表明,利用ITO/纤维素导电膜作为光电极时,器件的光电转换效率为1.1%、开路电压为0.67V、填充因子能为40.1%、短路电流为4.08mA/cm~2;利用ITO/纤维素导电膜作为对电极时,器件的光电转换效率高达5.2%、开路电压可达0.92V、填充因子能为59.4%、短路电流为9.52 mA/cm~2。使用ITO/纤维素导电膜作为染料敏化太阳能电池的对电极时,有利于降低电池中内损能量和光生载流子的产生,本研究方法为开发高性能染料敏化太阳能电池对电极材料提供了一种新的研究方法。
[Abstract]:The dye-sensitized solar cell is an electronic device for converting solar energy into electric energy, and is one of the most effective methods for people to use clean energy. As the core part of the electronic device, the transparent conductive substrate plays an important role in the performance of the dye-sensitized solar cell. As the cellulose has the advantages of abundant source, low price, biodegradability, and the like, the cellulose is expected to replace materials such as plastic, glass and the like, and a new-generation "green" electronic device for preparing the cellulose substrate material will become the hot spot of the research at home and abroad. The method comprises the following steps of: taking a dissolving pulp as a raw material, adopting an NMMO (N-methyl-1-N-oxide) as a solvent to prepare a transparent cellulose film, taking a transparent film as a substrate, preparing a transparent conductive cellulose film by a magnetron sputtering technology, and using a transparent conductive cellulose film as an electrode of a solar cell, a dye-sensitized solar cell is prepared. The influence of the factors such as the concentration of the cellulose, the dissolution time and the dissolution temperature on the properties of the cellulose film was analyzed, and the preparation technology of the transparent cellulose film was optimized. The results show that the cellulose film with high light transmittance and mechanical strength can be prepared under the optimum conditions of the cellulose concentration of 7%, the dissolution temperature of 110 鈩，
本文编号：2386018
[Abstract]:The dye-sensitized solar cell is an electronic device for converting solar energy into electric energy, and is one of the most effective methods for people to use clean energy. As the core part of the electronic device, the transparent conductive substrate plays an important role in the performance of the dye-sensitized solar cell. As the cellulose has the advantages of abundant source, low price, biodegradability, and the like, the cellulose is expected to replace materials such as plastic, glass and the like, and a new-generation "green" electronic device for preparing the cellulose substrate material will become the hot spot of the research at home and abroad. The method comprises the following steps of: taking a dissolving pulp as a raw material, adopting an NMMO (N-methyl-1-N-oxide) as a solvent to prepare a transparent cellulose film, taking a transparent film as a substrate, preparing a transparent conductive cellulose film by a magnetron sputtering technology, and using a transparent conductive cellulose film as an electrode of a solar cell, a dye-sensitized solar cell is prepared. The influence of the factors such as the concentration of the cellulose, the dissolution time and the dissolution temperature on the properties of the cellulose film was analyzed, and the preparation technology of the transparent cellulose film was optimized. The results show that the cellulose film with high light transmittance and mechanical strength can be prepared under the optimum conditions of the cellulose concentration of 7%, the dissolution temperature of 110 鈩，
本文编号：2386018
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