Analysis of the energy structure of nitrogen δ-doped GaAs superlattices for high efficiency intermediate band solar cells

Author(s):  
Shunsuke Noguchi ◽  
Shuhei Yagi ◽  
Yasuto Hijikata ◽  
Kentaro Onabe ◽  
Shigeyuki Kuboya ◽  
...  
2021 ◽  
Author(s):  
S Vahedi ◽  
Mohammad Eskandari ◽  
Azeez Barzinjy ◽  
Ali Rostami ◽  
Mahboubeh Dolatyari ◽  
...  

Abstract The performance of electronic devices, especially solar cells, at high temperatures is of primary interest to researchers. The design and construction of high-efficiency solar cells face some difficulties. One of these difficulties is the rising temperature, thus solar cells temperature assessment is essential to guarantee high performance. Normally, rising temperature, in solar cells, is associated with the normal ambient temperature and the produced internal temperature due to power dissipation. Accordingly, this investigation aims to reduce the effect of applied temperature from both sources. To reduce the destructive effect, the authors design a simple construction model that utilizes SiO2 and Si3N4 as a filtering layer. The outcomes of this study show that the power conversion is optimum. Si and SiC Solar cells both with and without using a filter are evaluated and compared. Finally, enhancement in power conversion efficiency and other characteristics has been investigated. The intermediate band solar cells were evaluated with both internal and external temperature effects. To reduce the internal temperature, the authors utilized a novel method for extracting the hot carriers from different energy levels by using multilevel energy selective contacts (ESCs). It was shown that ESCs promote efficiency and break the Shockley-Queisser limit.


2019 ◽  
Vol 512 ◽  
pp. 203-207 ◽  
Author(s):  
V. Deligiannakis ◽  
S. Dhomkar ◽  
M.S. Claro ◽  
I.L. Kuskovsky ◽  
M.C. Tamargo

2014 ◽  
Author(s):  
Jacob J. Krich ◽  
Anna H. Trojnar ◽  
Liang Feng ◽  
Karin Hinzer ◽  
Alexandre W. Walker

2013 ◽  
Vol 3 (4) ◽  
pp. 1287-1291 ◽  
Author(s):  
Shunsuke Noguchi ◽  
Shuhei Yagi ◽  
Daisuke Sato ◽  
Yasuto Hijikata ◽  
Kentaro Onabe ◽  
...  

2012 ◽  
Vol 26 (14) ◽  
pp. 1250090 ◽  
Author(s):  
N. E. GORJI ◽  
M. HOUSHMAND ◽  
S. S. DEHKORDI

The parameter electron filling factor can be taken as a scale for the electronic states in the intermediate band which should be de-localized and thus the unconfined electrons at the quantum dots. For three different value of electron filling factor, the sunlight concentration effect on the efficiency of a quantum dot solar cell is calculated. The maximum point of efficiency and optimum thickness of the cell obtained under three different sunlight concentrations. We show the importance of electron filling factor as a parameter to be more considered. This parameter can be controlled by the quantum dots size and distance between quantum dot layers in the active region. Analysis of above mentioned parameters suggest that to attain a maximum efficiency, the size of the quantum dots and the distance between the periodically arrayed dot layers have to be optimized. In addition, sunlight concentration is recommended as an effective approach to have high efficiency and low cost level solar cells.


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