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    Home > Chemicals Industry > Chemical Technology > Organic photovoltaic cell efficiency exceeds 20% for the first time   

    Organic photovoltaic cell efficiency exceeds 20% for the first time   

    • Last Update: 2022-04-25
    • Source: Internet
    • Author: User
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    Recently, Hou Jianhui, a researcher at the Institute of Chemistry, Chinese Academy of Sciences, has prepared a high-efficiency tandem organic photovoltaic cell with a photovoltaic efficiency of over 20%
    .


    This result has been verified by the China Metrology Institute, making organic photovoltaic cells enter a new stage of photovoltaic efficiency of 20% for the first time


    As a new photovoltaic technology with important application potential, organic photovoltaic cells have the characteristics of low cost and easy large-area fabrication.
    Improving the photoelectric energy conversion efficiency of organic photovoltaic cells is of great significance to promote the development of the field
    .


    Due to the more efficient utilization of sunlight, organic solar cells with a tandem stack configuration have obvious advantages in achieving high photovoltaic efficiency


    To solve the above problems, the research team prepared a series of high-efficiency tandem organic photovoltaic cells by developing a new tunnel junction structure
    .


    They essentially eliminated non-ohmic contacts within the tunnel junction by incorporating ultrathin metallic silver into the tunnel junction


    Recently, the team found that in the process of electron beam evaporation of titanium dioxide, the rutile phase of titanium dioxide can be converted into an amorphous film, which is not only uniform and dense, but also has better acid resistance
    .


    Further, they effectively tuned the chemical composition, electronic energy level, relative permittivity, and doping density of the deposits by precisely controlling the oxygen supplementation rate


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