scholarly journals Theoretical Study of One-Intermediate Band Quantum Dot Solar Cell

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Abou El-Maaty Aly ◽  
Ashraf Nasr
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Maximum Efficiency ◽  
Total Output ◽  
Bandgap Energy ◽  
Intermediate Band

The intermediate bands (IBs) between the valence and conduction bands play an important role in solar cells. Because the smaller energy photons than the bandgap energy can be used to promote charge carriers transfer to the conduction band and thereby the total output current increases while maintaining a large open circuit voltage. In this paper, the influence of the new band on the power conversion efficiency for the structure of the quantum dots intermediate band solar cell (QDIBSC) is theoretically investigated and studied. The time-independent Schrödinger equation is used to determine the optimum width and location of the intermediate band. Accordingly, achievement of maximum efficiency by changing the width of quantum dots and barrier distances is studied. Theoretical determination of the power conversion efficiency under the two different ranges of QD width is presented. From the obtained results, the maximum power conversion efficiency is about 70.42% for simple cubic quantum dot crystal under full concentration light. It is strongly dependent on the width of quantum dots and barrier distances.

A highly efficient (>6%) Cd1−xMnxSe quantum dot sensitized solar cell

2014 ◽  
Vol 2 (46) ◽  
pp. 19653-19659 ◽  
Author(s):  
Jianjun Tian ◽  
Lili Lv ◽  
Chengbin Fei ◽  
Yajie Wang ◽  
Xiaoguang Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Highly Efficient ◽  
Cdse Quantum Dot ◽  
Sensitized Solar Cells

The power conversion efficiency of CdS/CdSe sensitized solar cells is increased to 6.33% by doping Mn2+ into the CdSe quantum dot.

Effect of core quantum-dot size on power-conversion-efficiency for silicon solar-cells implementing energy-down-shift using CdSe/ZnS core/shell quantum dots

Nanoscale ◽  
2014 ◽  
Vol 6 (21) ◽  
pp. 12524-12531 ◽  
Author(s):  
Seung-Wook Baek ◽  
Jae-Hyoung Shim ◽  
Hyun-Min Seung ◽  
Gon-Sub Lee ◽  
Jin-Pyo Hong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Silicon Solar Cells ◽  
Core Shell

scholarly journals Boosting Power Conversion Efficiency of Quantum Dot-Sensitized Solar Cells by Integrating Concentrating Photovoltaic Concept with Double Photoanodes

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Pei Xu ◽  
Xiaopeng Chang ◽  
Runru Liu ◽  
Liying Wang ◽  
Xuesong Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photothermal Effect ◽  
Cell Architecture ◽  
Further Development ◽  
Sensitized Solar Cells

Abstract Despite great efforts dedicated to enhance power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs) in the past two decades, the efficiency of QDSSCs is still far behind its theoretical value. The present approaches for improving PCE are mainly focused on tailoring the bandgap of QDs to broadening light-harvesting and optimizing interfaces of component parts. Herein, a new solar cell architecture is proposed by integrating concentrating solar cell (CPV) concept into QDSSCs with double photoanode design. The Cu2S mesh is used as a counter electrode and sandwiched between two photoanodes. This designed battery structure can increase the PCE by 260% compared with a single photoanode. With the most extensively used CdS/CdSe QD sensitizers, a champion PCE of 8.28% (Voc = 0.629 V, Jsc = 32.247 mA cm−2) was achieved. This is mainly due to the increase in Jsc due to the double photoanode design and adoption of the CPV concept. In addition, another reason is that concentrated sunshine illumination induced a photothermal effect, accelerating the preceding chemical reactions associated with the conversion of polysulfide species. The cell fabrication and design reported here provides a new insight for further development of QDSSCs.

The effect of manganese in a CdS/PbS colloidal quantum dot sensitized TiO2 solar cell to enhance its efficiency

2015 ◽  
Vol 39 (6) ◽  
pp. 4805-4813 ◽  
Author(s):  
Hee-Je Kim ◽  
Hyun-Dong Lee ◽  
Challa Shesha Sai Pavan Kumar ◽  
Sunkara Srinivasa Rao ◽  
Sang-Hwa Chung ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Polysulfide Electrolyte ◽  
Colloidal Quantum Dot

The PbS/Mn-CdS electrode shows superior stability in a sulfide/polysulfide electrolyte with a power conversion efficiency (η) of 3.55%.

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