超短脉冲激光对单晶硅太阳能电池的损伤效应

Damage effect of monocrystalline silicon solar cells under ultrashort pulse laser irradiations

太阳能是未来的主要能源之一,关于太阳能电池的研究也逐渐成为热点。长期以来,人们对太阳能电池的高能粒子辐射特性进行了广泛的研究,对其激光辐照损伤特性的研究却很少。随着光电对抗技术的发展,对这方面的研究需求也越来越迫切。研究了532 nm、20 ns和300 ps脉冲激光对单晶硅太阳能电池的辐照效应,分析了超短脉冲激光对单晶硅太阳能电池的损伤机理。对比了超短脉冲激光和长脉冲激光、连续激光的损伤机理的异同。阐述了在激光单脉冲能量一定的情况下,损伤效果与脉宽和重频的关系。通过分析,指出了太阳能电池损伤的主因,激光对太阳能电池的破坏主要是依靠热效应。

Solar energy is one of the leading energy in the future,and researches about solar cells are becoming hot spots gradually.Its properties under energetic particles irradiations have been widely characterized,but there is few about its laser-induced damage.So it′s necessary to study the laser-induced damage of solar cells.Behaviors of monocrystalline silicon solar cells under 532 nm 20 ns and 300 ps pulse laser irradiations were studied.Damage mechanism of monocrystalline silicon solar cells under the irradiations of ultrashort pulse laser was analyzed.When the single pulse energy was fixed,the relation among damage effect,pulse width and repetition frequency was described.The differences of damage mechanism between different types of laser were compared.Through the analysis,the principal factor of solar cells′ damage was pointed out,and the damage of solar cells induced by laser irradiation mainly relied on the thermal effect.