Zheng Xiangjun, Wu Xiaoling, Wu Qiang, Han Yunfei, Ding Guanyu, Wang Yiming, Kong Yibo, Chen Tianyi, Wang Mengting, Zhang Yiqing, Xue Jingwei, Fu Weifei, Luo Qun, Ma Changqi, Ma Wei, Zuo Lijian, Shi Minmin, Chen Hongzheng
State Key Laboratory of Silicon and Advanced Semiconductor Materials, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Adv Mater. 2024 Mar;36(11):e2307280. doi: 10.1002/adma.202307280. Epub 2023 Dec 24.
The development of intrinsically stretchable organic photovoltaics (is-OPVs) with a high efficiency is of significance for practical application. However, their efficiencies lag far behind those of rigid or even flexible counterparts. To address this issue, an advanced top-illuminated OPV is designed and fabricated, which is intrinsically stretchable and has a high performance, through systematic optimizations from material to device. First, the stretchability of the active layer is largely increased by adding a low-elastic-modulus elastomer of styrene-ethylene-propylene-styrene tri-block copolymer (SEPS). Second, the stretchability and conductivity of the opaque electrode are enhanced by a conductive polymer/metal (denoted as M-PH1000@Ag) composite electrode strategy. Third, the optical and electrical properties of a sliver nanowire transparent electrode are improved by a solvent vapor annealing strategy. High-performance is-OPVs are successfully fabricated with a top-illuminated structure, which provides a record-high efficiency of 16.23%. Additionally, by incorporating 5-10% elastomer, a balance between the efficiency and stretchability of the is-OPVs is achieved. This study provides valuable insights into material and device optimizations for high-efficiency is-OPVs, with a low-cost production and excellent stretchability, which indicates a high potential for future applications of OPVs.
开发具有高效率的本征可拉伸有机光伏器件（is-OPV）对于实际应用具有重要意义。然而，它们的效率远远落后于刚性甚至柔性的同类器件。为了解决这个问题，通过从材料到器件的系统优化，设计并制造了一种先进的顶部照明OPV，它具有本征可拉伸性且性能优异。首先，通过添加低弹性模量的苯乙烯-乙烯-丙烯-苯乙烯三嵌段共聚物（SEPS）弹性体，大幅提高了活性层的可拉伸性。其次，通过导电聚合物/金属（记为M-PH1000@Ag）复合电极策略提高了不透明电极的可拉伸性和导电性。第三，通过溶剂蒸汽退火策略改善了银纳米线透明电极的光学和电学性能。成功制造出具有顶部照明结构的高性能is-OPV，其提供了创纪录的16.23%的高效率。此外，通过掺入5-10%的弹性体，实现了is-OPV效率和可拉伸性之间的平衡。这项研究为高效is-OPV的材料和器件优化提供了有价值的见解，具有低成本生产和优异的可拉伸性，这表明OPV在未来应用中具有很高的潜力。
