Title :
Projected Performance of InxGa1-xN-Based Multijunction Solar Cells
Author :
Islam, Md Rafiqul ; Rayhan, M.A. ; Hossain, M.E. ; Bhuiyan, Ashraful G. ; Islam, M.R. ; Yamamoto, A.
Author_Institution :
Dept. of Electr. & Electron. Eng., Khulna Univ. of Eng. & Technol.
Abstract :
This paper reports the theoretical design and performance of In xGa1-xN-based multijunction solar cells for high efficiency. A simulation model is developed which optimizes the design of MJ solar cells for high efficiency. The efficiency was optimized by optimizing the band gap and thickness of different cells while keeping the current mismatch between different cells below 0.2%. The efficiency is found to be varied from 34.2% for two junctions to 45.22% for six junctions. Further increase in junction does not significantly increase the efficiency. An efficiency of about 46% is achievable for a seven junctions with a photocurrent density of 8.33 mA/cm2 and an open-circuit voltage of 6.26 V. The photocurrent density and open circuit voltage of each junction are calculated under AM 1.5 and it is assumed that each junction absorbs the solar photons that are not absorbed by the preceding one
Keywords :
III-V semiconductors; energy gap; gallium compounds; indium compounds; photoconductivity; photons; solar cells; wide band gap semiconductors; 6.26 V; InGaN; band gap; multijunction solar cells; open circuit voltage; photocurrent density; solar photons; Charge carriers; Current density; Design engineering; Design optimization; High performance computing; Lattices; Photoconductivity; Photonic band gap; Photovoltaic cells; Voltage;
Conference_Titel :
Electrical and Computer Engineering, 2006. ICECE '06. International Conference on
Conference_Location :
Dhaka
Print_ISBN :
98432-3814-1
DOI :
10.1109/ICECE.2006.355335
