Patent ID: 8716595

Claim:
A solar cell comprising: a photovoltaic layer and a substantially transparent substance; and an anti-reflection coating; wherein the anti-reflection coating is disposed between the photovoltaic layer and the substantially transparent substance; and wherein the anti-reflection coating is disposed on a light-incident side of the photovoltaic layer; wherein the anti-reflection coating comprises a layer comprising boron nitride (BN) so as to form a BN layer, and wherein the layer comprising BN has a light incident side; and wherein the BN layer has been formed at a temperature below 350° C.; and wherein the BN layer comprises hexagonal crystals; wherein the BN layer has a refractive index greater than 2.4 at 1 eV to 6 eV; and wherein the substantially transparent substance is on the light incident side of the layer comprising BN.