scholarly journals External Quantum Efficiency Improvement with Luminescent Downshifting Layers: Experimental and Modelling

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
H. Ahmed ◽  
S. J. McCormack ◽  
J. Doran
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Optical Model ◽  
Crystalline Silicon ◽  
Organic Dye ◽  
Core Shell ◽  
Efficiency Improvement ◽  
Silicon Cell

Core-shell quantum dots CdSe/ZnS and lumogen yellow organic dye are characterized by their inclusion in luminescent downshifting (LDS) layers. Layers were deposited on top of crystalline silicon cell (c-Si), dye synthesized solar cell (DSSC), and cadmium telluride (CdTe) minimodules. External quantum efficiency measurements for the solar cell/LDS devices are discussed. Experimental results were compared with an optical model developed by Rothemund, 2014.

Efficiency Enhancement of GaAs Solar Cell Using Luminescent Down-Shifting Layer Consisting of (CdSe)ZnS Quantum Dots With Calculation and Experiment

2014 ◽  
Vol 137 (2) ◽  
Author(s):  
Youngkun Ahn ◽  
Jungyoon Kim ◽  
Seongbum Shin ◽  
Shraddha Ganorkar ◽  
Young-Hwan Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Efficiency ◽  
Crystalline Silicon ◽  
Strong Dependence ◽  
Crystalline Silicon Solar Cell ◽  
Efficiency Enhancement ◽  
Negative Change ◽  
Optimum Parameters ◽  
The Difference

In this work, we report the efficiency enhancement of a GaAs solar cell by using a luminescent down-shifting (LDS) layer consisting of (CdSe)ZnS quantum dots (QDs). The calculated conversion efficiency shows strong dependence on the luminescence quantum efficiency (LQE) and concentration of QDs in the LDS layer as well as the difference in external quantum efficiency (EQE) of the solar cell in the absorption and emission regions of the QD. Although the irradiance of the modified spectrum by the LDS layer was reduced with increases in QD concentration, the emission range of QDs in the spectrum was intensified. So the optimum parameters need to be calculated carefully. When we measured the GaAs solar cell with the LDS layer, it showed increased current density and consequently improved efficiency. The highest performance difference between the GaAs solar cell efficiencies with and without the LDS layer was over 2.8%, although a crystalline silicon solar cell below the LDS layer showed negative change in efficiency owing to its small EQE difference.

A large-area luminescent downshifting layer containing an Eu3+ complex for crystalline silicon solar cells

2020 ◽  
Vol 49 (15) ◽  
pp. 4725-4731
Author(s):  
Daqing Yang ◽  
Haiduo Liang ◽  
Yujie Liu ◽  
Man Hou ◽  
Liping Kan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Polyvinyl Alcohol ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Crystalline Silicon ◽  
Silicon Solar Cells ◽  
Large Area ◽  
Crystalline Silicon Solar Cells ◽  
Si Solar Cell

We present a large-area luminescent down-shifting layer consists of polyvinyl alcohol embedding a newly synthesized ternary Eu3+ complex. C-Si solar cell coated with this layer displayed an enhancement of ~15% in external quantum efficiency.

Simulation and modeling of the influence of temperature on CdS/CdTe thin film solar cell

2019 ◽  
Vol 87 (3) ◽  
pp. 30101 ◽  
Author(s):  
Abdel-baset H. Mekky
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Influence Of Temperature ◽  
Cdte Solar Cell ◽  
Cell Parameters ◽  
Current Voltage ◽  
Capacitance Voltage ◽  
Influence Of Temperature On

Semiconductor materials cadmium sulfide (CdS) and cadmium telluride (CdTe) are employed in the fabrication of thin film solar cells of relatively excessive power conversion efficiency and low producing price. Simulations of thin film CdS/CdTe solar cell were carried out using SCAPS-1D. The influence of temperature field on the variation of CdTe solar cell parameters such as current–voltage, capacitance–voltage characteristics and the external quantum efficiency was investigated theoretically. For use temperatures, one obtains the external quantum efficiency has the same profiles. However, the effect of the temperature on the Mott-Schottky curves is slightly noted by variations on the characteristics. This conclusion can be used by solar cell manufacturers to improve the solar cell parameters with the biggest possible gain in device performance.

High-efficiency, deep blue ZnCdS/CdxZn1−xS/ZnS quantum-dot-light-emitting devices with an EQE exceeding 18%

Nanoscale ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 5650-5657 ◽  
Author(s):  
Ouyang Wang ◽  
Lei Wang ◽  
Zhaohan Li ◽  
Qiulei Xu ◽  
Qingli Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue

18% peak external quantum efficiency (EQE) for deep blue QLEDs by using ZnCdS/CdxZn1−xS/ZnS quantum dots.

A simple synthesis route of low temperature CdSe-CdS core-shell quantum dots and its application in solar cell

2018 ◽  
Vol 82 ◽  
pp. 135-140 ◽  
Author(s):  
Karan Surana ◽  
Ibrahim T. Salisu ◽  
R.M. Mehra ◽  
Bhaskar Bhattacharya
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Low Temperature ◽  
Simple Synthesis ◽  
Core Shell ◽  
Synthesis Route

Model-based Quantitative Assessment of Crystallinity and Parasitic Absorption in Microcrystalline Silicon Solar Cells

2012 ◽  
Vol 1426 ◽  
pp. 383-387
Author(s):  
Thomas Lanz ◽  
Corsin Battaglia ◽  
Christophe Ballif ◽  
Beat Ruhstaller
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Scattering ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Quantitative Assessment ◽  
Silicon Solar Cells ◽  
Normalization Procedure ◽  
Microcrystalline Silicon ◽  
Scattering Model

ABSTRACTWe investigate the influence of the crystallinity of the absorber layer and parasitic absorption in the doped layers and electrodes on the external quantum efficiency and reflection of microcrystalline silicon (μc-Si:H) solar cells. Using an optical light scattering model we systematically study variations in the crystallinity and validate a simple normalization procedure that allows assessing the gains that can be achieved by reducing the parasitic absorption. The optimization potential is demonstrated with solar cell samples with increased crystallinity and eliminated parasitic absorption.

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