Silicon solar cell construction having two layer anti-reflection coating

In a silicon solar cell construction, a body formed essentially of silicon having a surface with a photovoltaic junction applied thereon, an anti-reflection coating formed on said surface, a transparent protective cover and a layer of substantially transparent cement securing said protective cover to said anti-reflection coating and to said body, said cover and said cement having indices of refraction of approximately 1.45, and approximately 1.4, respectively, said anti-reflection coating being formed of first and second layers, said first layer being formed of material having a high index of refraction which is less than that of silicon ranging from 2.35 to 2.4 and being closer to said silicon body than said second layer said second layer being formed of a material having a low index of refraction which is greater than that of the cement but less than that of said first layer ranging from 1.6 to 1.7.