Liu Xiaoyu, Zheng Zhong, Wang Jianqiu, Wang Yafei, Xu Bowei, Zhang Shaoqing, Hou Jianhui
State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemistry and Biology Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Adv Mater. 2022 Jan;34(3):e2106453. doi: 10.1002/adma.202106453. Epub 2021 Nov 19.
As a representative electron transporting layer in organic solar cells, zinc oxide (ZnO) can be fabricated by the meniscus-guided coating with the promotion of sol-gel technology. In order to fabricate stable and flexible organic solar cells (OSCs) based on the printable ZnO layers, here, a new method for simultaneously manipulating fluidics of the sol-gel ZnO precursor and optimizing processability of the ZnO layer for flexible OSCs is developed. It is found that the Marangoni recirculation in meniscus and the annealing temperature of the sol-gel ZnO precursor can be effectively modulated by changing the Lewis base. With the use of propylamine, the high-quality ZnO layer that is suitable for flexible OSCs can be fabricated through blade coating. Under such a condition, the formation of polar facet in ZnO layer is well restrained, which favors the photostability of the cells. As a result, the best 1.00 cm flexible cell outputs a power conversion efficiency of 16.71%, which is the best value till now.
作为有机太阳能电池中的代表性电子传输层，氧化锌（ZnO）可通过在溶胶 - 凝胶技术的促进下采用弯月面引导涂层法制备。为了基于可印刷的ZnO层制造稳定且柔性的有机太阳能电池（OSC），在此，开发了一种同时控制溶胶 - 凝胶ZnO前驱体流体动力学并优化用于柔性OSC的ZnO层加工性能的新方法。研究发现，通过改变路易斯碱可有效调节弯月面中的马兰戈尼再循环以及溶胶 - 凝胶ZnO前驱体的退火温度。使用丙胺时，可通过刮刀涂布制备出适用于柔性OSC的高质量ZnO层。在这种条件下，ZnO层中极性面的形成得到很好的抑制，这有利于电池的光稳定性。结果，最佳的1.00平方厘米柔性电池输出功率转换效率为16.71%，这是迄今为止的最佳值。
