InAs/GaAs and InAlGaAs/AlGaAs quantum dot based solar cells for intermediate band operation

2014 ◽  
Author(s):  
V. Tasco ◽  
A. Passaseo ◽  
A. Creti ◽  
G. Montagna ◽  
M. Lomascolo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Intermediate Band

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.

Quantum Dot Solar Cells

2014 ◽  
pp. 406-429
Author(s):  
Yoshitaka Okada ◽  
Katsuhisa Yoshida ◽  
Yasushi Shoji
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
High Efficiency ◽  
Research Topics ◽  
Intermediate Band ◽  
Hot Carrier ◽  
Quantum Dot Solar Cells ◽  
High Efficiency Solar Cells ◽  
Hot Carrier Effects ◽  
Low Dimensional

Advanced concepts for high efficiency solar cells such as hot carrier effects, Multi-Exciton Generation (MEG), and Intermediate-Band (IB) absorption in low-dimensional nanostructures are under focused research topics in recent years. Among various potential approaches, this chapter is devoted to the device physics and development of the state-of-the-art technologies for quantum dot-based IB solar cells.

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