材料科学
有机太阳能电池
涂层
聚合物
稳健性(进化)
光电子学
有机电子学
活动层
纳米技术
复合材料
脆性
图层(电子)
晶体管
电气工程
工程类
生物化学
化学
薄膜晶体管
电压
基因
作者
Qinglian Zhu,Jingwei Xue,Guanyu Lu,Baojun Lin,Hafiz Bilal Naveed,Zhaozhao Bi,Guanghao Lu,Wei Ma
出处
期刊:Nano Energy
[Elsevier]
日期:2022-06-01
卷期号:97: 107194-107194
被引量:24
标识
DOI:10.1016/j.nanoen.2022.107194
摘要
Mechanically durable organic solar cells (OSCs) with high efficiency are deemed as the ideal candidate for the power source of the next generation wearable electronic devices. However, the brittle nature of small molecules in most high-efficiency OSCs consisting of polymer and small molecule encourages easy formation of cracks in the photoactive film under deformation. Here, the vertical composition distribution of the active layer has been well optimized through sequential blade coating to realize highly deformable while efficient OSC. The optimized morphology exhibits distinct donor-rich and homogenous region distributed along the vertical direction in the bulk. The donor-rich region provides sufficient chain entanglements and strong interfaces beneficial for mechanical robustness of film, while homogeneously mixed region offers continuous interpenetrating network to maintain high device through-put, resulting in superior efficiency of 14.4% with high crack-onset strain (COS) of 30.5%. This efficiency versus COS combination is much higher than the best combination reported in all polymer systems (COS of 15.9% and efficiency of 11.1%). To the best of our knowledge, it is the highest COS value achieved in polymer-small molecule systems. The rational control over vertical stratification demonstrated here would guide researchers in the development of innovative wearable electronics.
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