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Volume 7 Issue 4, April 2022

Get into print

Organic solar cells can be fabricated with low-cost and scalable printing methods. Jiang et al. devise an alcohol-dispersed formulation of PEDOT — the commonly used hole-transport material — that overcomes drawbacks such as acidity, hygroscopicity and poor wetting properties, improving both the efficiency and stability of fully-printed solar cells.

See Jiang et al. and Research Briefing

Image: Lulu Sun, Huazhong University of Science and Technology. Cover Design: Thomas Phillips.

Editorial

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Comment & Opinion

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Research Highlights

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News & Views

  • Alkaline membrane fuel cells can operate using nonprecious metals as catalysts, but rely on polymeric membranes with high hydroxide conductivity and alkali-resistance, which are hard to find. A new membrane is now reported comprising ferrocenium cations in magnetically aligned domains with an excellent combination of these properties.

    • Patric Jannasch
    News & Views
  • The ever-growing consumption of energy to cool indoor spaces calls for more efficient, environmentally friendly and grid-flexible alternatives to vapour compression. Now, researchers demonstrate electrochemical refrigeration based on the thermogalvanic effect that could potentially address these needs.

    • Kurt Engelbrecht
    • Nini Pryds
    News & Views
  • Severe capacity fade in layered sodium oxide cathodes hinders their commercial feasibility in sodium batteries. Now, intrinsic lattice strain is unveiled as a new origin for their short cycle life, in addition to the common belief that phase transition or parasitic reactions are solely responsible.

    • Nicholas S. Grundish
    News & Views
  • Understanding the role of different types of energy-related information on consumer purchases is important for the design of effective energy-efficiency policies. Now, a randomised experiment adds energy-cost information to conventional EU energy labels and finds a tension between energy efficiency, price and total energy cost.

    • Nina Boogen
    News & Views
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Research Briefings

  • PEDOT:PSS is a water-dispersible hole-transport material commonly used in printed electronics, but its acidity, hygroscopicity and poor wetting properties can affect device performance. These issues can now be overcome by adopting an alcohol-dispersible formulation — PEDOT:F — that enables the production of efficient and stable fully printable organic solar cells.

    Research Briefing
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Reviews

  • Li–S batteries are a promising next-generation storage technology and the assessment of their performance is critical for their development. Here the authors analyse key Li–S cell parameters, formulate the energy density calculation and discuss design targets for practical applications.

    • Guangmin Zhou
    • Hao Chen
    • Yi Cui
    Perspective
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