کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
63795 48253 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Graphene quantum dots assisted photovoltage and efficiency enhancement in CdSe quantum dot sensitized solar cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Graphene quantum dots assisted photovoltage and efficiency enhancement in CdSe quantum dot sensitized solar cells
چکیده انگلیسی

CdSe quantum dot sensitized solar cells (QDSCs) modified with graphene quantum dots (GQDs) have been successfully achieved in this work for the first time. Satisfactorily, the optimized photovoltage (Voc) of the modified QDSCs was approximately 0.04 V higher than that of plain CdSe QDSCs, consequently improving the photovoltaic performance of the resulting QDSCs. Served as a novel coating on the CdSe QD sensitized photoanode, GQDs played a vital role in improving Voc due to the suppressed charge recombination which has been confirmed by electron impedance spectroscopy as well as transient photovoltage decay measurements. Moreover, different adsorption sequences, concentration and deposition time of GQDs have also been systematically investigated to boost the power conversion efficiency (PCE) of CdSe QDSCs. After the coating of CdSe with GQDs, the resulting champion CdSe QDSCs exhibited an improved PCE of 6.59% under AM 1.5G full one sun illumination.

Graphene quantum dots (GQDs) were coated on CdSe to fabricate CdSe-GQDs QDSCs and the improved PCE of 6.59% was achieved. GQD coating effectively suppressed charge recombination.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Chemistry - Volume 24, Issue 6, November 2015, Pages 722–728
نویسندگان
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