掺碳对杂质光伏硅太阳电池性能的影响

Influence of Carbon Impurity on the Performance of Silicon Solar Cells with Impurity Photovoltaic Effect

杂质光伏太阳电池是一种能够利用那些能量小于禁带宽度的太阳光子以提高电池转换效率的新型太阳电池。利用数值方法研究在硅电池中掺入碳杂质以形成杂质光伏太阳电池,分析掺碳对电池性能的影响。结果表明:利用杂质光伏效应掺入碳杂质能够增加子带光子的吸收,使得电池转换效率提高约2%;转换效率的提高在于电池的红外光谱响应的延展。由此可以得出:利用杂质光伏效应在硅电池中掺碳形成杂质光伏太阳电池是一种能够提高电池转换效率的新途径。

The solar cells with impurity photovoltaic effect can make use of the solar photons with the energy less than the bandgap.The impurity photovoltaic effect doped with carbon for silicon solar cells was investigated by numerical methods.The results show that the cell efficiency can increase by about 2.0% since some subband photons are absorbed due to the impurity photovoltaic effect.The improvement of the solar cell performance attributes to the extension of the infrared response.It can be concluded that employing carbon for impurity photovoltaic effect is a promising way for higher efficiency.