nnp:1d_gaas_solar_cells
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nnp:1d_gaas_solar_cells [2020/04/20 16:20] 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 addition properties of the solar cell. | + | The ''.log'' file and the file ''solar_cell_info.txt'' contain additional properties of the solar cell. |
| <code> | <code> | ||
| Solar cell results | Solar cell results | ||
| **************************************************************************************** | **************************************************************************************** | ||
| - | short-circuit current: I_sc = 68820.099637 [A/m^2] (photo current: It increases with smaller band gap.) | + | short-circuit current: I_sc = 184.149021 [A/m^2] (photo current: It increases with smaller band gap.) |
| - | open-circuit voltage: U_oc = -1.162500 [V] (U_oc <= built-in potential ~ band gap) | + | open-circuit voltage: U_oc = -1.012500 [V] (U_oc <= built-in potential ~ band gap) |
| - | current at maximum power: I_max = 63140.976306 [A/m^2] | + | current at maximum power: I_max = 180.613633 [A/m^2] |
| - | voltage at maximum power: U_max = -0.975000 [V] | + | voltage at maximum power: U_max = -0.900000 [V] |
| - | maximum power output: P_max = U_max * I_max = -61562.451898 [W/m^2] (condition for maximum power output: dP/dV = 0) | + | 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 = 61562.451898 [W/m^2] | + | maximum extracted power: P_solar = - P_max = 162.552270 [W/m^2] |
| - | incident power: P_in = 300110.889288 [W/m^2] | + | incident power: P_in = 1000.369631 [W/m^2] |
| - | ideal conversion efficiency: eta = P_max / P_in = 20.513235 % | + | ideal conversion efficiency: eta = P_max / P_in = 16.249221 % |
| - | fill factor: FF = 0.769498 | + | fill factor: FF = 0.871824 |
| In practice, a good fill factor is around 0.8. | In practice, a good fill factor is around 0.8. | ||
| All these results are approximations. | All these results are approximations. | ||
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