کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5451350 | 1513077 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of ionic radii of co-dopants (Mg, Ca, Al and La) in TiO2 on performance of dye-sensitized solar cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of ionic radii of co-dopants (Mg, Ca, Al and La) in TiO2 on performance of dye-sensitized solar cells Effects of ionic radii of co-dopants (Mg, Ca, Al and La) in TiO2 on performance of dye-sensitized solar cells](/preview/png/5451350.png)
چکیده انگلیسی
Doping is a method whereby small amounts of impurities are introduced into the lattice of a material and is employed for improving the efficiency of dye-sensitized solar cells (DSSCs) via modification of the semiconductor material. Co-doping, which involves doping with more than one type of impurity, is typically used over doping owing to its unique effects on the short-circuit current and open-circuit voltage; the different types of added impurities can exert a synergy effect in enhancing the performance of DSSCs. Of particular interest is the study of the effects of the ionic radii of co-dopants on the performance of DSSCs that is not well understood to date. Thus, in this paper, TiO2 was co-doped with lanthanum and magnesium, calcium, or aluminium at respective contents of 0.5Â mol%. The co-doped TiO2 and pure TiO2 powders were prepared by sol-gel. Mg-La co-doped TiO2-based DSSC displayed the highest efficiency (i.e., 6.60%) and Al-La co-doped TiO2-based DSSC displayed the lowest efficiency. Among the dopants studied herein, aluminium ion has the smallest ionic radius. Thus, aluminium ions could easily enter the lattice structure of TiO2, generating a high concentration of holes that led to the decrease of electron transport and photocurrent, hence lower DSSC efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 141, 1 January 2017, Pages 249-255
Journal: Solar Energy - Volume 141, 1 January 2017, Pages 249-255
نویسندگان
Alwani Imanah Rafieh, Piyasiri Ekanayake, Ai Ling Tan, Chee Ming Lim,