Performance enhancement of quantum dot sensitized solar cells by adding electrolyte additives

2015 ◽  
Vol 3 (33) ◽  
pp. 17091-17097 ◽  
Author(s):  
Jun Du ◽  
Xinxin Meng ◽  
Ke Zhao ◽  
Yan Li ◽  
Xinhua Zhong
Keyword(s):  
Solar Cells ◽  
Polyethylene Glycol ◽  
Quantum Dot ◽  
Performance Enhancement ◽  
Charge Recombination ◽  
Electrolyte Additives ◽  
Polysulfide Electrolyte ◽  
Recombination Processes ◽  
Sensitized Solar Cells

The parasitic charge recombination processes between TiO2/QDs/electrolyte interfaces were effectively suppressed with the addition of polyethylene glycol (PEG) additive in polysulfide electrolyte, giving enhancement of PCE from 5.80% to 6.74% in the corresponding cell devices.

Efficient Quantum Dot-Sensitized Solar Cells through Sulfur-rich Carbon Nitride Modified Electrolyte

Nanoscale ◽  
2021 ◽  
Author(s):  
akash sanjay rasal ◽  
Khalilalrahman Dehvari ◽  
Girum Getachew ◽  
chiranjeevi korupalli ◽  
Anil Vitthal Ghule ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Carbon Nitride ◽  
Charge Recombination ◽  
Polymer Additives ◽  
Polysulfide Electrolyte ◽  
Electrolyte Interface ◽  
Recombination Processes ◽  
Sensitized Solar Cells

For quantum dot sensitized solar cells (QDSSCs), modifying conservative polysulfide electrolyte with polymer additives has been proven as an effectual way to control the charge recombination processes at TiO2/QDs/electrolyte interface...

Poly(vinyl pyrrolidone): a superior and general additive in polysulfide electrolytes for high efficiency quantum dot sensitized solar cells

2016 ◽  
Vol 4 (29) ◽  
pp. 11416-11421 ◽  
Author(s):  
Guocan Jiang ◽  
Zhenxiao Pan ◽  
Zhenwei Ren ◽  
Jun Du ◽  
Cheng Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Charge Recombination ◽  
Vinyl Pyrrolidone ◽  
Polysulfide Electrolyte ◽  
Poly Vinyl Pyrrolidone ◽  
Sensitized Solar Cells

Poly(vinyl pyrrolidone) (PVP) was used as a superior and general additive to modify the traditional polysulfide electrolyte in quantum dot sensitized solar cells and the photovoltaic performance of the constructed solar cells was significantly improved benefiting from the reduced charge recombination.

Quantum dot sensitized solar cells with efficiency over 12% based on tetraethyl orthosilicate additive in polysulfide electrolyte

2017 ◽  
Vol 5 (27) ◽  
pp. 14124-14133 ◽  
Author(s):  
Juan Yu ◽  
Wenran Wang ◽  
Zhenxiao Pan ◽  
Jun Du ◽  
Zhenwei Ren ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Charge Recombination ◽  
Tetraethyl Orthosilicate ◽  
Polysulfide Electrolyte ◽  
Sensitized Solar Cells

Benefiting from the suppressed charge recombination occurring at the photoanode/electrolyte interfaces with the introduction of TEOS additive in the polysulfide electrolyte, a remarkable PCE of over 12% was obtained for ZCISe QDSCs.

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.

scholarly journals A Suitable Polysulfide Electrolyte for CdSe Quantum Dot-Sensitized Solar Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
H. K. Jun ◽  
M. A. Careem ◽  
A. K. Arof
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Liquid Electrolyte ◽  
Solvent Ratio ◽  
Cdse Qds ◽  
Pure Ethanol ◽  
Cell Efficiency ◽  
Polysulfide Electrolyte ◽  
Cdse Quantum Dot ◽  
Sensitized Solar Cells

A polysulfide liquid electrolyte is developed for the application in CdSe quantum dot-sensitized solar cells (QDSSCs). A solvent consisting of ethanol and water in the ratio of 8 : 2 by volume has been found as the optimum solvent for preparing the liquid electrolytes. This solvent ratio appears to give higher cell efficiency compared to pure ethanol or water as a solvent. Na2S and S give rise to a good redox couple in the electrolyte for QDSSC operation, and the optimum concentrations required are 0.5 M and 0.1 M, respectively. Addition of guanidine thiocyanate (GuSCN) to the electrolyte further enhances the performance. The QDSSC with CdSe sensitized electrode prepared using 7 cycles of successive ionic layer adsorption and reaction (SILAR) produces an efficiency of 1.41% with a fill factor of 44% on using a polysulfide electrolyte of 0.5 M Na2S, 0.1 M S, and 0.05 M GuSCN in ethanol/water (8 : 2 by volume) under the illumination of 100 mW/cm2white light. Inclusion of small amount of TiO2nanoparticles into the electrolyte helps to stabilize the polysulfide electrolyte and thereby improve the stability of the CdSe QDSSC. The CdSe QDs are also found to be stable in the optimized polysulfide liquid electrolyte.

Charge generation performance enhancement by size-dependent Cu2GeSe3quantum dot-sensitized solar cells

2019 ◽  
Vol 12 (01) ◽  
pp. 1850090
Author(s):  
Zhou Liu ◽  
Zhuoyin Peng ◽  
Jianlin Chen ◽  
Wei Li ◽  
Jian Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Conversion Efficiency ◽  
Performance Enhancement ◽  
Photovoltaic Performance ◽  
Charge Generation ◽  
Transfer Property ◽  
Photon Conversion ◽  
Sensitized Solar Cells

Cu2GeSe3 quantum dot is introduced to instead of non-toxic CuInSe2 as a sensitizer for solar cells, which is employed to enhance the photovoltaic performance. Cu2GeSe3 quantum dots with various sizes are prepared by thermolysis process, which are employed for the fabrication of quantum dot-sensitized solar cells (QDSSC) according to assembly linking process. The optical absorption properties of the Cu2GeSe3 quantum dot-sensitized photo-electrodes have been obviously enhanced by the size optimization of quantum dots, which are better than that of CuInSe2-based photo-electrodes. Due to the balance on the deposition quantity and charge transfer property of the quantum dots, 3.9[Formula: see text]nm-sized Cu2GeSe3 QDSSC exhibits the highest current density value and incident photon conversion efficiency response, which result in a higher photovoltaic conversion efficiency than that of CuInSe2 QDSSC. The modulation of Cu2GeSe3 QDs will further improve the performance of photovoltaic devices.

Fumed SiO2 modified electrolytes for quantum dot sensitized solar cells with efficiency exceeding 11% and better stability

2016 ◽  
Vol 4 (37) ◽  
pp. 14194-14203 ◽  
Author(s):  
Huiyun Wei ◽  
Guoshuai Wang ◽  
Jiangjian Shi ◽  
Huijue Wu ◽  
Yanhong Luo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Electrolyte Additive ◽  
Polysulfide Electrolyte ◽  
Sensitized Solar Cells ◽  
Fumed Sio2

Fumed SiO2 nanoparticles have been used as a polysulfide electrolyte additive for improving the performance of CdSexTe1−x QDSCs.

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