Aqueous-Processed Polymer/Nanocrystal Hybrid Solar Cells with Efficiency of 5.64%: The Impact of Device Structure, Polymer Content, and Film Thickness

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• 作者：Gan Jin ; Haotong Wei ; Zhongkai Cheng ; Henan Sun ; Haizhu Sun ; Bai Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2017
• 出版时间：February 2, 2017
• 年：2017
• 卷：121
• 期：4
• 页码：2025-2034
• 全文大小：655K
• ISSN：1932-7455

文摘

Due to their environmentally friendly ideology, aqueous-processed hybrid solar cells (HSCs) are favored for industrial production. However, relatively low device performance urges the progress in power conversion efficiency (PCE) for their further applications. In this work, the function of polymer and nanocrystal (NC) is studied by investigating three different device structures. The polymer (low hole mobility), which plays an important role even if the content is extremely low, is mainly responsible for enhancing the V_oc and FF, while the NC (high hole mobility) is the principle part in light absorbing, carrier generating, and transporting. The intensive study of polymer and NC makes it possible to achieve high performance through adjusting the thickness of different active layers by using device structures of the cathode/electron transport layer (ETL)/NC/polymer:NC/hole transport layer (HTL)/anode. An efficient aqueous-processed HSC with PCE of 5.64% is obtained which presents the highest performance among polymer/NC HSCs to date.