scholarly journals An inverted ZnO/P3HT:PbS bulk-heterojunction hybrid solar cell with a CdSe quantum dot interface buffer layer

RSC Advances ◽  
2020 ◽  
Vol 10 (28) ◽  
pp. 16693-16699 ◽  
Author(s):  
Ajith Thomas ◽  
R. Vinayakan ◽  
V. V. Ison
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Dot ◽  
Buffer Layer ◽  
Active Layer ◽  
Bulk Heterojunction ◽  
Hybrid Solar Cell ◽  
Device Performance ◽  
Cdse Quantum Dots ◽  
Cdse Quantum Dot

An inverted bulk-heterojunction hybrid solar cell with the structure ITO/ZnO/P3HT:PbS/Au was prepared. The device performance was enhanced by inserting an interface buffer layer of CdSe quantum dots between the ZnO and the P3HT:PbS BHJ active layer.

Efficiency Improvement in P3HT:CdSe Quantum Dots Hybrid Solar Cells by Utilizing Novel Processing of a Dual Ligand Exchangers

2013 ◽  
Vol 1537 ◽  
Author(s):  
M. Alam Khan ◽  
U. Farva ◽  
Yongseok Jun ◽  
Omar Manasreh
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Active Layer ◽  
Weight Ratio ◽  
Average Diameter ◽  
Additional Treatment ◽  
Hybrid Solar Cell ◽  
Cdse Quantum Dots ◽  
Cell Conversion ◽  
Ito Glass

ABSTRACTCdSe quantum dots of hexagonal Wurtzite crystal structure with an average diameter of ∼7 nm were synthesized and processed for bulk heterojunction solar cell applications. The UV-Vis absorption spectrum shows an excitonic peak at 625 nm and at 635 nm in synthesized and dual ligand exchanged samples, respectively. The synthesized quantum dots were successively ligand exchanged by pyridine and 2-propanethiol to remove the TOPO ligands on quantum dot surface and then hybrid solar cell devices were fabricated. Initially the weight ratio was optimized by using pyridine capped CdSe blend with P3HT polymer as an active layer in chloroform as a solvent on the patterned ITO glass. Then dual ligand exchanged CdSe was compared with pyridine optimized samples. The maximum solar cell conversion efficiency of 1.21% was achieved with Jsc of 4.1 mA/cm-2, VOC of 0.51 and FF of 44 compared to the optimized pyridine capped CdSe quantum dots where efficiency of 0.74% with Jsc of 2.15 mA/cm-2, VOC of 0.53 was observed. The increase in solar cell efficiency was attributed to the better ligand exchanged and additional treatment with 2-propanethiol at ambient temperature. Such an exchange of organic ligands by successive ligand exchanger will open new domain for hybrid solar cell research. The morphology of QDs and microstructures of the heterojunction active layer (P3HT:CdSe) were examined by using TEM, XRD, UV-Vis spectra, and IV curve techniques.

Anisotropic Nanostructure ZnO Photoelectrodes for CdS/CdSe Quantum Dot Sensitized Solar Cells

2013 ◽  
Vol 873 ◽  
pp. 556-561
Author(s):  
Jian Jun Tian
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Chemical Bath Deposition ◽  
Cdse Quantum Dots ◽  
Silar Method ◽  
Nanorods Array ◽  
Cdse Quantum Dot ◽  
Cbd Method ◽  
Sensitized Solar Cells

CdS/CdSe quantum dots co-sensitized solar cells (QDSCs) were prepared by combining the successive ion layer absorption and reaction (SILAR) method and chemical bath deposition (CBD) method for the fabrication of CdS and CdSe quantum dots, respectively. In this work, we designed anisotropic nanostructure ZnO photoelectrodes, such as nanorods/nanosheets and nanorods array, for CdS/CdSe quantum dots co-sensitized solar cells. Our study revealed that the performance of QDSCs could be improved by modifying surface of ZnO to increase the loading of quantum dots and reduce the charge recombination.

The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

2016 ◽  
Vol 18 (6) ◽  
pp. 4300-4303 ◽  
Author(s):  
J. Huang ◽  
Y. Tang ◽  
K. L. Mulfort ◽  
X. Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Charge Separation ◽  
Cdse Quantum Dots ◽  
X Ray ◽  
Molecular Catalyst ◽  
Cdse Quantum Dot ◽  
Photoinduced Charge Separation ◽  
X Ray Absorption ◽  
Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

Investigation of Quantum Dot Solar Cell Device Performance

2013 ◽  
Vol 1551 ◽  
pp. 137-142
Author(s):  
Neil S. Beattie ◽  
Guillaume Zoppi ◽  
Ian Farrer ◽  
Patrick See ◽  
Robert W. Miles ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
Band Gap ◽  
Control Device ◽  
Open Circuit ◽  
Device Performance ◽  
Intermediate Band ◽  
Control Devices

ABSTRACTThe device performance of GaAs p-i-n solar cells containing stacked layers of self-assembled InAs quantum dots is investigated. The solar cells demonstrate enhanced external quantum efficiency below the GaAs band gap relative to a control device without quantum dots. This is attributed to the capture of sub-band gap photons by the quantum dots. Analysis of the current density versus voltage characteristic for the quantum dot solar cell reveals a decrease in the series resistance as the device area is reduce from 0.16 cm2 to 0.01 cm2. This is effect is not observed in control devices and is quantum dot related. Furthermore, low temperature measurements of the open circuit voltage for both quantum dot and control devices provide experimental verification of the conditions required to realise an intermediate band gap solar cell.

Size-dependent CdSe quantum dot–lysozyme interaction and effect on enzymatic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (52) ◽  
pp. 46744-46754 ◽  
Author(s):  
Kishan Das ◽  
Kamla Rawat ◽  
Rajan Patel ◽  
H. B. Bohidar
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Enzymatic Activity ◽  
Cdse Quantum Dots ◽  
Size Dependent ◽  
Cdse Quantum Dot

Size-dependent (2.5 and 6.3 nm) interaction of MPA modified hydrophilic CdSe quantum dots with lysozyme are reported.

Synthesis of CdSe quantum dots for quantum dot sensitized solar cell

2014 ◽  
Author(s):  
Neetu Singh ◽  
Vinod Kumar ◽  
R. M. Mehra ◽  
Avinashi Kapoor
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Dot ◽  
Cdse Quantum Dots

Flexible quantum dot sensitized solar cell by electrophoretic deposition of CdSe quantum dots on ZnO nanorods

2011 ◽  
Vol 13 (29) ◽  
pp. 13182 ◽  
Author(s):  
Jing Chen ◽  
Wei Lei ◽  
Chi Li ◽  
Yan Zhang ◽  
Yiping Cui ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Dot ◽  
Electrophoretic Deposition ◽  
Zno Nanorods ◽  
Cdse Quantum Dots
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