Studies from Chinese Academy of Sciences Yield New Data on Materials Science (Printable Highly Conductive Conjugated Polymer Sensitized ZnO NCs as Cathode Interfacial Layer for Efficient Polymer Solar Cells)
By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Materials Science have been published. According to news reporting from Beijing, People's Republic of China, by VerticalNews journalists, research stated, "We report a facile way to produce printable highly conductive cathode interfacial layer (CIL) for efficient polymer solar cells (PSCs) by sensitizing ZnO nanocrystals (NCs) with a blue fluorescent conjugated polymer, poly(9, 9-bis-(6'-diethoxylphosphorylhexyl) fluorene) (PFEP). Herein, PFEP plays dual distinctive roles in the composite."
The news correspondents obtained a quote from the research from the Chinese Academy of Sciences, "Firstly, PFEP chains can effectively block the aggregation of ZnO NCs, leading to uniform and smooth film during solution processing via assembly on ZnO NC surfaces through their pending phosphonate groups. Secondly, PFEP can greatly improve the conductivity of ZnO NCs by charge transfer doping, that is the charge transfer from the sensitizer driven by electron-chemical potential equilibrium, which could be even more pronounced under light illumination because of light excitation of PFEP sensitizer. The increased conductivity in ZnO-PFEP layer renders more efficient electron transport and extraction compared to pristine ZnO layer. This ZnO-PFEP CIL was successfully applied to PSCs based on three polymer donor systems with different band-gaps, and efficiency enhancements from 44 to 70% were observed compared to those PSCs with pristine ZnO CIL. The highest efficiency of 7.56% was achieved in P(IID-DTC):PC70BM-based PSCs by using ZnO-PFEP film as CIL. Moreover, the enhanced conductivity due to the charge-transfer doping effect allows thick ZnO-PFEP film to be used as CIL in high-performance PSCs. Both the high conductivity and good film-forming properties of ZnO-PFEP CIL are favorable for large-scale printable PSCs, which is also verified by high-efficiency PSCs with ZnO-PFEP CIL fabricated using doctor-blading, a large-scale processing technique."
According to the news reporters, the research concluded: "The work provides an efficient printable cathode interfacial material for efficient PSCs."
For more information on this research see: Printable Highly Conductive Conjugated Polymer Sensitized ZnO NCs as Cathode Interfacial Layer for Efficient Polymer Solar Cells. ACS Applied Materials & Interfaces, 2014;6(11):8237-8245. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Applied Materials & Interfaces - www.pubs.acs.org/journal/aamick)
Our news journalists report that additional information may be obtained by contacting J. Liu, Univ Chinese Academy Sci, Beijing 100039, People's Republic of China. Additional authors for this research include J. Wu, S.Y. Shao, Y.F. Deng, B. Meng, Z.Y. Xie, Y.H. Geng, L.X. Wang and F.L. Zhang.
Keywords for this news article include: Asia, Beijing, Materials Science, People's Republic of China
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