Device Modeling of the Performance of Cu(In,Ga)Se<sub>2</sub> Solar Cells with V-Shaped Bandgap Profiles

<table>The band diagrams of CIGS solar cells with the cases (a) positive <svg height="20.387501" id="M42" style="vertical-align:-2.7337pt" version="1.1" viewbox="0 0 42.362499 20.387501" width="42.362499" 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,-.012,28.438,7.8)"><path d="M372 352v-2q176 -27 176 -159q0 -99 -95 -151q-73 -40 -196 -40h-221v28q65 5 78.5 19t13.5 76v404q0 63 -12 77t-72 18v28h257q102 0 150 -34q26 -18 41 -48.5t15 -65.5q0 -111 -135 -150zM213 362h47q80 0 117.5 32t37.5 96q0 56 -33 92t-100 36q-41 0 -56 -10
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</svg> and (b) negative <svg height="20.387501" id="M43" style="vertical-align:-2.7337pt" version="1.1" viewbox="0 0 42.362499 20.387501" width="42.362499" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,15.95)"><path d="M600 0h-557v24l268 633l28 8l261 -641v-24zM497 50l-194 489l-196 -489h390z" id="x394"></path></g><g transform="matrix(.017,-0,0,-.017,10.959,15.95)"><path d="M517 162l29 -4q-18 -100 -35 -158h-482v28q68 5 83.5 20t15.5 77v398q0 66 -13 80t-73 19v28h446q0 -8 8 -144l-29 -4q-11 51 -32 85q-11 17 -35 23t-78 6h-76q-23 0 -28 -5t-5 -27v-228h94q67 0 83 12t25 63h29v-191h-29q-10 54 -26 65.5t-81 11.5h-95v-189
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<g transform="matrix(.012,-0,0,-.012,28.438,7.8)"><path d="M372 352v-2q176 -27 176 -159q0 -99 -95 -151q-73 -40 -196 -40h-221v28q65 5 78.5 19t13.5 76v404q0 63 -12 77t-72 18v28h257q102 0 150 -34q26 -18 41 -48.5t15 -65.5q0 -111 -135 -150zM213 362h47q80 0 117.5 32t37.5 96q0 56 -33 92t-100 36q-41 0 -56 -10
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</svg>.</table>

International Journal of Photoenergy

fig4

Figure 4

Figure 4: Device Modeling of the Performance of Cu(In,Ga)Se<sub>2</sub> Solar Cells with V-Shaped Bandgap Profiles 

International Journal of Photoenergy

Device Modeling of the Performance of Cu(In,Ga)Se2 Solar Cells with V-Shaped Bandgap Profiles

Figure 4

Device Modeling of the Performance of Cu(In,Ga)Se₂ Solar Cells with V-Shaped Bandgap Profiles