We investigated with numerical simulations the effects that transparent conductive oxide front contact (TCO) can have on amorphous silicon/crystalline silicon heterojunction solar cells. We found that, due to the extremely thin emitter layer used in this kind of device, the built-in potential available cannot be merely defined by the difference between the work function of the emitter and the base, but it depends on TCO work function too. As a consequence, because the correlation between built-in potential and open circuit voltage, TCO work function strongly affects the solar cell performance. Simulation results show that an higher work function leads to the best device efficiency.
Role of fron contact work function on amorphous silicon/crystalline silicon heterojunction solar cell performance
2003
Abstract
We investigated with numerical simulations the effects that transparent conductive oxide front contact (TCO) can have on amorphous silicon/crystalline silicon heterojunction solar cells. We found that, due to the extremely thin emitter layer used in this kind of device, the built-in potential available cannot be merely defined by the difference between the work function of the emitter and the base, but it depends on TCO work function too. As a consequence, because the correlation between built-in potential and open circuit voltage, TCO work function strongly affects the solar cell performance. Simulation results show that an higher work function leads to the best device efficiency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
