利用铜纳米颗粒提高太阳能电池效率

Improved Efficiency of Solar Cells Using Cu Nanoparticles

采用磁控溅射系统在晶硅太阳能电池表面沉积了不同覆盖率的Cu纳米颗粒。以没有纳米颗粒覆盖的太阳能电池作为参考电池,研究了Cu纳米颗粒对太阳能电池电学特性的影响。结果表明:在覆盖率增加的过程中,纳米颗粒主要以单个纳米颗粒的形式出现,并且很少有纳米颗粒发生团聚现象。具有2%纳米颗粒覆盖率电池的外量子效率最好。电流-电压特性测量结果表明:具有2%纳米颗粒覆盖率电池的填充因子和转换效率最好。与参考电池相比,2%纳米颗粒覆盖率电池的填充因子相对提高了36.5%,转换效率相对提高了37%。

Cu nanoparticles with different coverages were deposited on crystalline Si solar cell surfaces by a magnetron sputtering system. The solar cell without nanoparticles was used as a reference cell. The influence of Cu nanoparticles on the electrical performance of solar cells was investigated. The results show that the nanoparticles appear predominantly single particles, and a few nanoparticles within some clusters occur when the coverage increases. The optimum external quantum efficiency （EQE） of the cell with 2% nanoparticles coverage can be obtained. According to the current-voltage （I-V） measurements, the optimum fill factor and conversion efficiency of the cell with 2% nanoparticles coverage can be obtained. The fill factor of the cell with 2% nanoparticles coverage is increased by 36.5% and the conversion efficiency of the cell with 2% nanoparticles coverage is increased by 37%, compared to the reference cell.