nnp:1d_gaas_solar_cells
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nnp:1d_gaas_solar_cells [2020/04/20 15:29] 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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| </figure> | </figure> | ||
| - | 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)=133 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.// | ||
| - | //The convergence of the simulation is sensitive to the device setting such as number of suns. If the convergence fails in your original device, please consider changing the setting in [[https://www.nextnano.com/nextnano3/input_parser/keywords/numeric-control.htm|$numeric-control]] (nextnano³) or [[https://www.nextnano.com/nextnanoplus/software_documentation/input_file/run.htm|run{}]] (nextnano++).// | + | //The convergence of the simulation is sensitive to the device settings such as the number of suns. If the convergence fails in your original device, please consider changing the settings in [[https://www.nextnano.com/nextnano3/input_parser/keywords/numeric-control.htm|$numeric-control]] (nextnano³) or [[https://www.nextnano.com/nextnanoplus/software_documentation/input_file/run.htm|run{}]] (nextnano++).// |
| * Please help us to improve our tutorial. Should you have any questions or comments, please send them to <support@nextnano.com>. | * Please help us to improve our tutorial. Should you have any questions or comments, please send them to <support@nextnano.com>. | ||
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