کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1263753 972076 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Performance enhancement of diindenoperylene-based organic photovoltaic cells by nanocolumn-arrays
ترجمه فارسی عنوان
افزایش کارایی سلول های فتوولتائیک آلی مبتنی بر دی دیانوپرویلن توسط آرایه های نانوذرات
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی


• Interdigitated nanocolumnar structures for organic solar cells.
• Enhanced power conversion efficiency compared to planar devices.
• Glancing angle deposition beneficial for organic molecular orientation.

Crystalline and uniform nanocolumns of the organic semiconductor diindenoperylene (DIP) were fabricated by glancing-angle deposition and employed in organic photovoltaic cells (OPVCs) forming an interdigitated donor/acceptor heterojunction, with fullerene as electron acceptor. In comparison to reference bilayer devices the nanocolumn-based solar cells exhibit increased power conversion efficiency. Based on a comprehensive structural and morphological analysis, we identify three advantages of the interdigitated nanocolumn structures: (i) The active donor/acceptor interface area, crucial for exciton dissociation, is increased and the column diameter is in the range of the exciton diffusion length. (ii) The molecular orientation of DIP is such in the nanocolumns that light absorption is enhanced. (iii) The ubiquitous presence of vertical interfaces throughout nanocolumn-based devices is further beneficial to light absorption, as it fully compensates wavelength-dependent interference effects within the device structure. This work shows how the benefits of nanocolumns can go beyond simple interface area enlargement to improve the efficiency of OPVCs.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 15, Issue 10, October 2014, Pages 2210–2217
نویسندگان
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