nnp:1d_gaas_solar_cells
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nnp:1d_gaas_solar_cells [2020/04/20 15:40] stefan.birner [How does a solar cell work? & How do we simulate it?] |
nnp:1d_gaas_solar_cells [2024/01/03 16:42] stefan.birner removed |
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| The maximum efficiency of the present device increases to **22.3% for 100-sun concentration** according to nextnano³ simulation, mainly due to the increase in open circuit voltage (Figure {{ref>efficiency}}, blue). This means one cell operating under 100 suns can produce the same power output as 100 P<sub>sun</sub>*0.223/(P<sub>sun</sub>*0.17)=131 cells under 1 sun. Optical concentration reduces the total cost of solar cells since concentrator materials are usually less expensive than the ones for solar cells [Sze]. | The maximum efficiency of the present device increases to **22.3% for 100-sun concentration** according to nextnano³ simulation, mainly due to the increase in open circuit voltage (Figure {{ref>efficiency}}, blue). This means one cell operating under 100 suns can produce the same power output as 100 P<sub>sun</sub>*0.223/(P<sub>sun</sub>*0.17)=131 cells under 1 sun. Optical concentration reduces the total cost of solar cells since concentrator materials are usually less expensive than the ones for solar cells [Sze]. | ||
| + | The ''.log'' file and the file ''solar_cell_info.txt'' contain additional properties of the solar cell. | ||
| + | |||
| + | <code> | ||
| + | Solar cell results | ||
| + | **************************************************************************************** | ||
| + | short-circuit current: I_sc = 184.149021 [A/m^2] (photo current: It increases with smaller band gap.) | ||
| + | open-circuit voltage: U_oc = -1.012500 [V] (U_oc <= built-in potential ~ band gap) | ||
| + | current at maximum power: I_max = 180.613633 [A/m^2] | ||
| + | voltage at maximum power: U_max = -0.900000 [V] | ||
| + | maximum power output: P_max = U_max * I_max = -162.552270 [W/m^2] (condition for maximum power output: dP/dV = 0) | ||
| + | maximum extracted power: P_solar = - P_max = 162.552270 [W/m^2] | ||
| + | incident power: P_in = 1000.369631 [W/m^2] | ||
| + | ideal conversion efficiency: eta = P_max / P_in = 16.249221 % | ||
| + | fill factor: FF = 0.871824 | ||
| + | In practice, a good fill factor is around 0.8. | ||
| + | All these results are approximations. | ||
| + | They are only correct if a lot of voltage steps have been used (i.e. a high resolution of bias steps). | ||
| + | </code> | ||
| //With nextnano++ one can simulate up to the I-V characteristics. We are currently implementing the power-V curve and efficiency-V curve.// | //With nextnano++ one can simulate up to the I-V characteristics. We are currently implementing the power-V curve and efficiency-V curve.// | ||
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