کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6536445 | 49326 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simple experimental test to distinguish extraction and injection barriers at the electrodes of (organic) solar cells with S-shaped current-voltage characteristics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Simple experimental test to distinguish extraction and injection barriers at the electrodes of (organic) solar cells with S-shaped current-voltage characteristics Simple experimental test to distinguish extraction and injection barriers at the electrodes of (organic) solar cells with S-shaped current-voltage characteristics](/preview/png/6536445.png)
چکیده انگلیسی
Adjusting the work function of the two electrodes to the energy levels of the intrinsic active materials of an organic solar cell is crucial for a good device performance. Often, injection barriers (in combination with selective contacts blocking one charge carrier species) caused by a misaligned metal work function or extraction barriers resulting from insulating intentional or unintentional interlayers between metal and active layers, result in a decrease in fill factor seen in the extreme case in S-shaped current-voltage (J-V) characteristics. To avoid this S-kink, it is essential to identify its origin, desirably applying a simple experimental method. We propose an approach based on analyses of current-voltage data as a function of illumination intensity. A normalization of the J-V curves at the saturated photocurrent reveals distinctive features for each type of barrier. We apply the method to planar heterojunction small-molecule and bulk heterojunction polymer solar cells with oxidized metal electrode or plasma-treated active layer and explain the theory with a drift-diffusion model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 117, October 2013, Pages 599-603
Journal: Solar Energy Materials and Solar Cells - Volume 117, October 2013, Pages 599-603
نویسندگان
Wolfgang Tress, Olle Inganäs,