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Robust and hydrophobic interlayer material for efficient and highly stable organic solar cells
Joule ( IF 38.6 ) Pub Date : 2023-03-15 , DOI: 10.1016/j.joule.2023.02.013
Yi Yang , Jingwen Wang , Yunfei Zu , Qing Liao , Shaoqing Zhang , Zhong Zheng , Bowei Xu , Jianhui Hou

Interlayer materials play a critical role in fabricating highly stable organic solar cells (OSCs). Here, we design a cross-linkable naphthalene diimide (NDI) derivative to prepare a robust and hydrophobic electron transporting interlayer for OSCs. A non-polar electron donor PCy2 is elaborately selected to n-dope the crosslinked c-NDI:PCy2 film, by which the doping density of c-NDI:PCy2 is increased by five times to obtain a high conductivity of 6.51 × 10−3 S/m. Meanwhile, the strong hydrophobicity of c-NDI:PCy2 effectively protects the device against water ingress, endowing OSCs with excellent water resistance. A power conversion efficiency of 17.7% is obtained with the c-NDI:PCy2 interlayer, representing the highest value for OSCs with an inverted device architecture. Strikingly, this OSC can be used underwater. By immersing the non-encapsulated cell in water, 70% of its initial efficiency is maintained after 1,000 h in the dark or 4 h under continuous illumination (100 mW/cm2).



中文翻译:

用于高效和高度稳定的有机太阳能电池的坚固疏水中间层材料

中间层材料在制造高度稳定的有机太阳能电池 (OSC) 中起着至关重要的作用。在这里,我们设计了一种可交联的萘二酰亚胺 (NDI) 衍生物,为 OSC 制备坚固且疏水的电子传输夹层。精心选择非极性电子供体PCy 2对交联的c -NDI:PCy 2薄膜进行n掺杂,使c -NDI:PCy 2的掺杂密度提高5倍,获得6.51 × 10 -3秒/米。同时, c -NDI:PCy 2的强疏水性有效防止设备进水,赋予OSC优异的防水性能。使用c -NDI:PCy 2夹层可获得 17.7% 的功率转换效率,代表具有倒置器件架构的 OSC 的最高值。引人注目的是,这个 OSC 可以在水下使用。通过将未封装的电池浸入水中,在黑暗中放置 1,000 小时或在连续照明 (100 mW/cm 2) 下放置 4 小时后,其初始效率可保持 70 %

更新日期:2023-03-15
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