Optimization of the CdS quantum dot sensitized solar cells with ZnS passivation layer

Zheng, Wen-Chen; Wang, Di; Wang, Qiming

doi:10.1007/s10854-018-9616-9

Cited by 10 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Usually, there exist some cracks caused by the uneven shrink of photoanode film during sintering which is really harmful to electron transport in photoanode film and further decreases the photovoltaic performance of cells. 30 In order to lessen the impact of cracks on electron transport efficiency in photoanode, RGO was doped into TiO 2 matrix to offer the tunnel for carriers because of its unique structural characteristic and electrical property. 31 As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

The High Performance of Quantum Dot Sensitized Solar Cells Co-Sensitized with Mixed-Joint CdS and ZnS Quantum Dots

Zheng¹,

Wang²,

Wang³

et al. 2019

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

We propose a facile way to prepare CdS and ZnS quantum dots (QDs) in photoanode oxide films in quantum dot sensitized solar cells (QDSCs). CdS QDs as sunlight harvester and ZnS as passivation layer are deposited in mesoporous RGO/TiO2 (reduced graphene oxide and TiO2 composite) films alternately through successive ionic layer adsorption and reaction (SILAR) to engineer the mixed-joint CdS/ZnS QDs. For comparison, another CdS and ZnS QDs are prepared with depositing all CdS firstly and then ZnS QDs in mesoporous RGO/TiO2 films. The power conversion efficiency (PCE) of mixed-joint CdS/ZnS based cell samples improve greatly, up to 6.37%, almost two times higher than that of bare CdS based quantum dot sensitized solar cells (2.54%), and also higher than that of CdS/ZnS based QDSCs (4.12%) obviously. Since the conduction band of ZnS (bandgap, 3.6ev) is higher than that of CdS (bandgap, 2.25ev), ZnS quantum dots can suppress reversed transport of photo-excited electrons and improve the efficiency of electron collection and meanwhile, they also impede hole transfer from the valance band of CdS to electrolytes. It seems to be an optimal way to solve this contradiction when mixed-joint CdS/ZnS are used to cosensitize QDSCs due to their characteristic architecture. The mechanism of effect of ZnS QDs on the photovoltaic performance of QDSCs is investigated combined sensitized photoanode microstructural characterization and electrochemical impedance spectroscopy (EIS) and J-V curve analysis of cell samples.

show abstract

Section: Resultsmentioning

confidence: 99%

The High Performance of Quantum Dot Sensitized Solar Cells Co-Sensitized with Mixed-Joint CdS and ZnS Quantum Dots

Zheng¹,

Wang²,

Wang³

et al. 2019

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…25 CdS and ZnS QDs were loaded in RGO/TiO 2 photoanode via SILAR method with Cd(NO 3 ) 2 ethanol, Na 2 S·9H 2 O methanol solution and Na 2 S·9H 2 O methanol and Zn(CH 3 COO) 2 aqueous solution, respectively. 26 Polysulfide electrolyte comprised of Na 2 S·9H 2 O, S, NaOH, and deionized water. 27 All CEs were assembled with CdS and ZnS QDs sensitized RGO/TiO 2 photoanodes and injected polysulfide electrolyte into QDSC samples, which were then sealed with an organic film spacer.…”

Section: Methodsmentioning

confidence: 99%

Interface architecture of low-cost and stable three-dimensional composite counter electrodes for QDSCs

Zhang

Chen

Dong

et al. 2022

Inorg. Chem. Front.

View full text Add to dashboard Cite

show abstract

Eco-friendly AgInS2/ZnS quantum dot nanohybrids with tunable luminescent properties modulated by pH-sensitive biopolymer for potential solar energy harvesting applications

Mansur

Tabare

Paiva

et al. 2019

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Optimization of the CdS quantum dot sensitized solar cells with ZnS passivation layer

Cited by 10 publications

References 30 publications

The High Performance of Quantum Dot Sensitized Solar Cells Co-Sensitized with Mixed-Joint CdS and ZnS Quantum Dots

The High Performance of Quantum Dot Sensitized Solar Cells Co-Sensitized with Mixed-Joint CdS and ZnS Quantum Dots

Interface architecture of low-cost and stable three-dimensional composite counter electrodes for QDSCs

Eco-friendly AgInS2/ZnS quantum dot nanohybrids with tunable luminescent properties modulated by pH-sensitive biopolymer for potential solar energy harvesting applications

Contact Info

Product

Resources

About