Numerical study of InGaN tandem solar cells with intermediate bands

作者：Chen Kuo Feng^*; Hung Chien Lun

来源：Physica Status Solidi-Rapid Research Letters, 2017, 11(2): 1600429.

DOI：10.1002/pssr.201600429

• InGaN
• solar cells
• intermediate bands
• tandem solar cells
• device simulation

Theoretical investigations of InGaN tandem solar cells with intermediate bands (IBs) have been conducted through calculating the diode equation taking into account the radiative and nonradiative recombination currents. The calculated maximum efficiencies of the double-junction cell with one IB in each subcell are 57.85% and 68.37% under AM1.5G one-sun and 46000-sun illuminations, respectively. It has also been observed that the combined device with the top-cell bandgaps of 2.9-3.4 eV (2.6-3.4 eV for full concentration) may have an opportunity to realize the application of over 50% efficiency. We suggest that the optimized width of the IB layer be designed in the range of 1-6 mu m if its absorption coefficient is 10(4)-10(5) cm(-1) in the IB region.

• 出版日期2017-2