Determination of the Electron Lifetime in Nanocrystalline Dye Solar Cells by Open-Circuit Voltage Decay Measurements

ChemPhysChem ◽  
2003 ◽  
Vol 4 (8) ◽  
pp. 859-864 ◽  
Author(s):  
Arie Zaban ◽  
Miri Greenshtein ◽  
Juan Bisquert
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Electron Lifetime ◽  
Voltage Decay ◽  
Dye Solar Cells

scholarly journals ZnS/SiO2 Passivation Layer for High-Performance of TiO2/CuInS2 Quantum Dot Sensitized Solar Cells

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1931
Author(s):  
Hee-Je Kim ◽  
Jin-Ho Bae ◽  
Hyunwoong Seo ◽  
Masaharu Shiratani ◽  
Chandu Venkata Veera Muralee Gopi
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
High Performance ◽  
Open Circuit Voltage ◽  
Charge Recombination ◽  
Open Circuit ◽  
Passivation Layer ◽  
Voltage Decay ◽  
Sensitized Solar Cells ◽  
Η Value

Suppressing the charge recombination at the interface of photoanode/electrolyte is the crucial way to improve the quantum dot sensitized solar cells (QDSSCs) performance. In this scenario, ZnS/SiO2 blocking layer was deposited on TiO2/CuInS2 QDs to inhibit the charge recombination at photoanode/electrolyte interface. As a result, the TiO2/CuInS2/ZnS/SiO2 based QDSSCs delivers a power conversion efficiency (η) value of 4.63%, which is much higher than the TiO2/CuInS2 (2.15%) and TiO2/CuInS2/ZnS (3.23%) based QDSSCs. Impedance spectroscopy and open circuit voltage decay analyses indicate that ZnS/SiO2 passivation layer on TiO2/CuInS2 suppress the charge recombination at the interface of photoanode/electrolyte and enhance the electron lifetime.

Variable Rank Differential Smoothing Technique for Electron Lifetime Calculation in Dye-Sensitized Solar Cells

2017 ◽  
Vol 48 ◽  
pp. 1-7
Author(s):  
Wei Peng ◽  
Shu Zhen Yang ◽  
Wei Hu
Keyword(s):  
Solar Cells ◽  
Data Processing ◽  
Open Circuit Voltage ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Electron Lifetime ◽  
Dye Sensitized ◽  
Lifetime Value ◽  
Key Factor ◽  
Sensitized Solar Cells

The free electron lifetime is a key factor in determining the performance of a dye-sensitized solar cells (DSCs). Open-circuit voltage-decay (OCVD) suggested by Zaban is a useful technique to provide continuous reading of the electron lifetime as a function of device’s open-circuit voltage (Voc), but the data processing has never been studied in order to get high accuracy electron lifetime value from the high resolution decaying voltage data. In this manuscript, we introduce the variable rank differential smoothing (VRDS) technique in the electron lifetime data processing. We find it can lessen data loss and give highly accurate electron lifetime value in the range of Voc decaying. We also get the effective recombination order values based on the VRDS technique, which indicate different potential processes due the two different values. These results show the detail kinetics information and microscopic device physic characteristics, which are very important to understand the device working mechanism and meaningful for realizing higher performance solar cells.

Control of morphology and defect density in zinc oxide for improved dye-sensitized solar cells

2016 ◽  
Vol 18 (44) ◽  
pp. 30475-30483 ◽  
Author(s):  
Seul Ah Kim ◽  
Muhammad Awais Abbas ◽  
Lanlee Lee ◽  
Byungwuk Kang ◽  
Hahkjoon Kim ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Electrochemical Impedance ◽  
Defect Density ◽  
Dye Sensitized Solar Cells ◽  
Surface Characteristics ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Voltage Decay ◽  
Sensitized Solar Cells

The surface characteristics of the ZnO photoelectrode in dye-sensitized solar cells are elucidated by in-depth electrochemical analyses including open-circuit voltage decay measurements and electrochemical impedance spectroscopy.

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