New Results in Optical Modelling of Quantum Well Solar Cells

<table>(a) Voltage-current characteristic (line) and the output power (points) of the cell with the following MQW system: GaAs/Al<sub>0.3</sub>Ga<sub>0.7</sub>As, <svg height="15.4" id="M91" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 59.8125 15.4" width="59.8125" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.112)"><use xlink:href="#x1D441"></use></g>
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<g transform="matrix(.017,-0,0,-.017,28.738,11.112)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,43.424,11.112)"><use xlink:href="#x33"></use></g><g transform="matrix(.017,-0,0,-.017,51.584,11.112)"><use xlink:href="#x30"></use></g>
</svg>, <svg height="16.450001" id="M92" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 49.537498 16.450001" width="49.537498" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,-0,0,-.012,4.637,16.25)"><use xlink:href="#x1D464"></use></g>
<g transform="matrix(.017,-0,0,-.017,18.45,12.162)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,33.137,12.162)"><use xlink:href="#x32"></use></g><g transform="matrix(.017,-0,0,-.017,41.296,12.162)"><use xlink:href="#x30"></use></g>
</svg> nm, <svg height="16.450001" id="M93" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 46.637501 16.450001" width="46.637501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.017,-0,0,-.017,15.563,12.162)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,30.249,12.162)"><use xlink:href="#x31"></use></g><g transform="matrix(.017,-0,0,-.017,38.409,12.162)"><use xlink:href="#x30"></use></g>
</svg> nm and the antireflecting coating depth <svg height="12.4375" id="M94" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 45.299999 12.4375" width="45.299999" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.162)"><path d="M530 686q-79 -330 -126 -595q-5 -24 4 -24q22 0 77 53l16 -24q-42 -49 -88 -78.5t-72 -29.5q-37 0 -19 83l21 99h-2q-62 -83 -153 -141q-65 -41 -97 -41q-28 0 -48 31.5t-20 91.5q0 71 32.5 144t88.5 118q36 30 94 52.5t94 22.5q38 0 68 -13l29 158q7 40 2 47.5t-38 7.5
h-35l1 26q39 4 76 13.5t58.5 17t27.5 7.5q16 0 9 -26zM387 375q-11 11 -38.5 20t-51.5 9q-45 0 -79 -23q-46 -32 -77.5 -107.5t-31.5 -143.5q0 -40 9.5 -58.5t23.5 -18.5q40 0 113.5 70t99.5 118z" id="x1D451"></path></g><g transform="matrix(.017,-0,0,-.017,14.205,12.162)"><use xlink:href="#x3D"></use></g><g transform="matrix(.017,-0,0,-.017,28.909,12.162)"><use xlink:href="#x36"></use></g><g transform="matrix(.017,-0,0,-.017,37.069,12.162)"><path d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" id="x34"></path></g>
</svg> nm. (b) The MQW cell efficiency depending on the antireflecting coating depth. The dotted line indicates the ideal cell efficiency with zero reflectance. (c) The efficiency of MQW cell based on the number of quantum wells.</table>

International Journal of Photoenergy

New Results in Optical Modelling of Quantum Well Solar Cells

Figure 9