3 years ago

Annealing-Free ZnO:PEI Composite Cathode Interfacial Layer for Efficient Organic Solar Cells

Annealing-Free ZnO:PEI Composite Cathode Interfacial Layer for Efficient Organic Solar Cells
Xinyuan Zhang, Shengping Ruan, Zhiqi Li, Liu Zhang, Wenbin Guo, Chunyu Liu
The polymer solar cells owning organic–inorganic composite cathode interlayer are fabricated to achieve well electron extraction compared to the devices with single inorganic semiconductor materials, leading to a significant enhancement of short-circuit current density (Jsc) and fill factor (FF) as well as slight improvement of open-circuit voltage (Voc). The incorporation of PEI mainly contributes to the decreased work function of the ZnO layer and the reduced interfacial barrier, which are beneficial for the easy electrons extraction and the declined charge recombination. Strikingly, a postannealing treatment is employed for the completed device with electrode to improve the interfacial characteristics between the active layer and the MoO3 layer, which is a successful method to further increase the Voc for the device based on PTB7:PC71BM. Our work provides a simple fabrication technology to improve the interfacial contact between active layer and adjacent interlayer, while possessing the major roles on the simultaneously enhanced Jsc, FF, and Voc.

Publisher URL: http://dx.doi.org/10.1021/acsphotonics.7b01096

DOI: 10.1021/acsphotonics.7b01096

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.