کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9812078 1518106 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electroabsorption studies of organic bulk-heterojunction solar cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Electroabsorption studies of organic bulk-heterojunction solar cells
چکیده انگلیسی
The working principle of organic bulk-heterojunction solar cells is a widely discussed topic. For thin film solar cells it is commonly supposed that the built-in potential Vbi is the driving force for charge separation and determines the open-circuit voltage Voc. In former works, Vbi was estimated by measuring Voc in the saturation regime. To check the validity of this model, the direct measurement of the built-in potential is desirable. We have investigated the origin of the open-circuit voltage of organic bulk-heterojunction solar cells by means of electroabsorption spectroscopy. This technique allows measurement of the built-in potential directly and therefore permits an independent measurement of Vbi and Voc. In our experiments on indium tin oxide/poly(3,4-ethylendioxythiophene) : poly(styrene-sulfonate)/poly(2 -methoxy-5-(3′,7′-dimethyloktyloxy)-p-phenylene-vinylene) : 1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6)C61/metal bulk-heterojunction solar cells no significant correlation between the open-circuit voltage and the built-in potential was observed. For certain electrode materials, i.e. gold and copper, Voc exceeded Vbi which is revealing of semipermeable membranes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 493, Issues 1–2, 22 December 2005, Pages 170-174
نویسندگان
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