P N 2 topics · 2 sources ScienceEnergyA semiconductor (photovoltaic) device structure in which the junction is formed between a p-type layer and an n-type layer.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite TechnologyDefenseProbability of Negotiation.DoD Missile Defense Agency — MDA Glossary Cite