The Missing Piece in Solar's 33% Efficiency Breakthrough: Why Interface Engineering Finally Unlocked Perovskite-Silicon's Full Potential
After years of promise and disappointment, perovskite-silicon tandem solar cells have shattered the 33% efficiency barrier through a breakthrough in bilayer interface passivation. Hong Kong Polytechnic University’s 33.89% certified achievement—the first perovskite tandem to exceed single-junction theoretical limits—proves that the key wasn’t better materials, but solving the hidden interface problem that silently destroyed charge carriers at the nanoscale junction between layers.