D–A–D Based Complementary Unsymmetrical Squaraine Dyes for Co-sensitized Solar Cells: Enhanced Photocurrent Generation and Suppressed Charge Recombination Processes by Controlled Aggregation

2021 ◽  
Vol 4 (4) ◽  
pp. 3182-3193
Author(s):  
Ambarish Kumar Singh ◽  
Athulya Nellur Veetil ◽  
Jayaraj Nithyanandhan
Keyword(s):  
Solar Cells ◽  
Charge Recombination ◽  
Squaraine Dyes ◽  
Photocurrent Generation ◽  
Recombination Processes ◽  
Sensitized Solar Cells

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...

scholarly journals Pyran-Squaraine as Photosensitizers for Dye-Sensitized Solar Cells: DFT/TDDFT Study of the Electronic Structures and Absorption Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Reda M. El-Shishtawy ◽  
Shaaban A. Elroby ◽  
Abdullah M. Asiri ◽  
Rifaat H. Hilal
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Nbo Analysis ◽  
Basis Set ◽  
Absorption Properties ◽  
Charge Delocalization ◽  
Squaraine Dyes ◽  
Dye Sensitized ◽  
Donor Acceptor ◽  
Sensitized Solar Cells

In an effort to provide, assess, and evaluate a theoretical approach which enables designing efficient donor-acceptor dye systems, the electronic structure and optical properties of pyran-squaraine as donor-acceptor dyes used in dye-sensitized solar cells were investigated. Ground state properties have been computed at the B3LYP/6-31+G**level of theory. The long-range corrected density functionals CAM-B3LYP, PBEPBE, PBE1PBE (PBE0), and TPSSH with 6-311++G**were employed to examine absorption properties of the studied dyes. In an extensive comparison between experimental results and ab initio benchmark calculations, the TPSSH functional with 6-311++G**basis set was found to be the most appropriate in describing the electronic properties for the studied pyran and squaraine dyes. Natural transition orbitals (NTO), frontier molecular orbitals (FMO), LUMO, HOMO, and energy gaps, of these dyes, have been analyzed to show their effect on the process of electron injection and dye regeneration. Interaction between HOMO and LUMO of pyran and squaraine dyes was investigated to understand the recombination process and charge-transfer process involving these dyes. Additionally, we performed natural bond orbital (NBO) analysis to investigate the role of charge delocalization and hyperconjugative interactions in the stability of the molecule.

Using Orbital Symmetry to Minimize Charge Recombination in Dye-Sensitized Solar Cells

2012 ◽  
Vol 125 (3) ◽  
pp. 1007-1009 ◽  
Author(s):  
Emanuele Maggio ◽  
Natalia Martsinovich ◽  
Alessandro Troisi
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Orbital Symmetry ◽  
Dye Sensitized ◽  
Sensitized 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.

Plasmon-enhanced photocurrent generation in quantum dots-sensitized solar cells by coupling of gold nanocrystals

2015 ◽  
Vol 60 (5) ◽  
pp. 541-548 ◽  
Author(s):  
Ke Cheng ◽  
Yangqing Wu ◽  
Jian Meng ◽  
Yaolong Zhao ◽  
Xiaoyun Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Gold Nanocrystals ◽  
Photocurrent Generation ◽  
Sensitized Solar Cells

scholarly journals Bis-tridentate Ru(ii) sensitizers with a spatially encumbered 2,6-dipyrazolylpyridine ancillary ligand for dye-sensitized solar cells

RSC Advances ◽  
2017 ◽  
Vol 7 (67) ◽  
pp. 42013-42023 ◽  
Author(s):  
Ting-Kuang Chang ◽  
Yun Chi
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Ancillary Ligand ◽  
Dye Sensitized ◽  
Dye Loading ◽  
Sensitized Solar Cells

The sensitizer TF-tBu_C3F7 has shown the highest overall efficiencies of JSC = 18.47 mA cm−2, VOC = 767 mV, FF = 0.71 and PCE = 10.05% under simulated one sun irradiation, due to the fine balance between dye loading and reduced charge recombination.

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