Printable Electronic Research Center, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Collaborative Innovation Center of Suzhou Nano Science and Technology , Suzhou 215123, P. R. China.
Nano Science and Technology Institute, University of Science and Technology of China , Suzhou, Jiangsu 215123, P. R. China.
ACS Appl Mater Interfaces. 2018 Jan 10;10(1):943-954. doi: 10.1021/acsami.7b13346. Epub 2017 Dec 22.
In the aim to realize high performance semitransparent fully coated organic solar cells, printable electrode buffer layers and top electrodes are two important key technologies. An ideal ink for the preparation of the electrode buffer layer for printed top electrodes should have good wettability and negligible solvent corrosion to the underlying layer. This work reports a novel organic-inorganic composite of phosphomolybdic acid (PMA) and PEDOT:PSS that features excellent wettability with the active layer and printed top Ag nanowires and high resistibility to solvent corrosion. This composite buffer layer can be easily deposited on a polymer surface to form a smooth, homogeneous film via spin-coating or doctor-blade coating. Through the use of this composite anode buffer layer, fully coated semitransparent devices with doctor-blade-coated functional layers and spray-coated Ag nanowire top electrodes showed the highest power conversion efficiency (PCE) of 5.01% with an excellent average visible-light transmittance (AVT) of 50.3%, demonstrating superior overall characteristics with a comparable performance to and a much higher AVT than cells based on a thermally evaporated MoO/Ag/MoO thin film electrode (with a PCE of 5.77% and AVT of 19.5%). The current work reports the fabrication of fully coated inverted organic solar cells by combining doctor-blade coating and spray coating and, more importantly, demonstrates that a nanocomposite of a polyoxometalate and conjugated polymer could be an excellent anode buffer layer for the fully coated polymer solar cells with favorable interfacial contact, hole extraction efficiency, and high comparability with full printing.
为了实现高性能半透明全涂层有机太阳能电池，可印刷电极缓冲层和顶电极是两项重要的关键技术。用于制备印刷顶电极的电极缓冲层的理想油墨应该具有良好的润湿性和对底层的溶剂腐蚀性可忽略不计。本工作报道了一种新型的磷钼酸（PMA）和PEDOT：PSS 的有机-无机复合材料，具有与活性层和印刷顶银纳米线极好的润湿性以及对溶剂腐蚀性的高电阻性。这种复合缓冲层可以通过旋涂或刮刀涂布很容易地沉积在聚合物表面上形成光滑、均匀的薄膜。通过使用这种复合阳极缓冲层，采用刮刀涂布功能层和喷涂银纳米线顶电极的全涂层半透明器件表现出最高的功率转换效率（PCE）为 5.01%，具有出色的平均可见光透过率（AVT）为 50.3%，显示出优异的整体特性，与基于热蒸发 MoO/Ag/MoO 薄膜电极的器件相比性能相当，AVT 更高（PCE 为 5.77%，AVT 为 19.5%）。本工作报道了通过刮刀涂布和喷涂相结合制备全涂层倒置有机太阳能电池，并更重要的是表明，聚多金属氧酸盐和共轭聚合物的纳米复合材料可以作为具有良好界面接触、空穴提取效率和与全印刷高度可比性的全涂层聚合物太阳能电池的优异阳极缓冲层。
