کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1263686 1496833 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Origin of high fill factor in polymer solar cells from semiconducting polymer with moderate charge carrier mobility
ترجمه فارسی عنوان
منبع فراوانی پرکننده در سلولهای خورشیدی پلیمری از پلیمرهای نیمه رسانا با تحرک ناشی از بارگیری متوسط
کلمات کلیدی
سلول های خورشیدی پلیمر، فاکتور پر کردن، شبیه سازی مدل رانش-انتشار، بازسازی شارژ
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی


• We demonstrated a high fill factor (∼73–76%) in polymer solar cells from polymer only with moderate hole mobility (10−5–10−4 cm2/V s).
• A drift–diffusion simulation study showed that reduced charge recombination loss is mainly responsible for the improvement of FF.
• Device modeling showed the theoretical upper limit (80–82%) of FF can be reached if the hole mobility is within 10−3–10−1 cm2/V s.

The fill factor of polymer bulk heterojunction solar cells (PSCs), which is mainly governed by the processes of charge carrier generation, recombination, transport and extraction, and the competition between them in the device, is one of the most important parameters that determine the power conversion efficiency of the device. We show that the fill factor of PSCs based on thieno[3,4-b]-thiophene/benzodithiophene (PTB7):[6,6]-phenyl C71-butyric acid methylester (PC71BM) blend that only have moderate carrier mobilities for hole and electron transport, can be enhanced to 76% by reducing the thickness of the photoactive layer. A drift–diffusion simulation study showed that reduced charge recombination loss is mainly responsible for the improvement of FF, as a result of manipulating spatial distribution of charge carrier in the photoactive layer. Furthermore, the reduction of the active layer thickness also leads to enhanced built-in electric field across the active layer, therefore can facilitate efficient charge carrier transport and extraction. Finally, the dependence of FF on charge carrier mobility and transport balance is also investigated theoretically, revealing that an ultrahigh FF of 80–82% is feasible if the charge mobility is high enough (∼10−3–10−1 cm2/V s).

We show that the fill factor of PSCs based on thieno[3,4-b]-thiophene/benzodithiophene (PTB7):[6,6]-phenyl C71-butyric acid methylester (PC71BM) blend that only have moderate carrier mobilities for hole and electron transport, can be enhanced to 76% by reducing the thickness of the photoactive layer. Our drift–diffusion simulation study showed that an ultrahigh FF of 80–82% is feasible if the charge mobility is high enough (∼10−3–10−1 cm2/V s).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 24, September 2015, Pages 125–130
نویسندگان
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