Graphene quantum dots assisted photovoltage and efficiency enhancement in CdSe quantum dot sensitized solar cells

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, consequent...

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Bibliographic Details
Published inJournal of energy chemistry Vol. 24; no. 6; pp. 722 - 728
Main Authors Zhong, Yuanyuan, Zhang, Hua, Pan, Dengyu, Wang, Liang, Zhong, Xinhua
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2015
Subjects
CdSe QDSCs
CdSe量子点
Coating
Graphene quantum dot
Open-circuit voltage
Power conversion efficiency
光伏性能
功率转换效率
太阳能电池
敏化
瞬态光电压
石墨
阳极涂层
CdSe QDSCs
Open-circuit voltage
Coating
Power conversion efficiency
Graphene quantum dot
Online AccessGet full text
ISSN2095-4956
DOI10.1016/j.jechem.2015.10.006

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Summary: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 measure- ments. 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.
Bibliography:Graphene quantum dot CdSe O DSCs Coating Open-circuit voltage Power conversion efficiency
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 measure- ments. 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.
21-1585/O4
ISSN:2095-4956
DOI:10.1016/j.jechem.2015.10.006