{"knowledge_schema": {"broad_category": "Physics \u2192 Materials Science \u2192 Organic Semiconductors", "refinement": "This topic involves the behavior of charge carriers in organic semiconductors, particularly in the presence of trap states that can affect charge transport.", "specific_scope": "The focus is on the conditions under which the Mott-Gurney law, which describes the current-voltage characteristics of organic semiconductors, remains valid despite the presence of traps.", "goal": "Identify the necessary conditions for the Mott-Gurney law to hold true in the presence of trap states in organic semiconductors."}, "summary": "In the study of organic semiconductors, understanding the impact of trap states on charge transport is crucial. The Mott-Gurney law describes the relationship between current and voltage in these materials. For this law to remain valid in the presence of traps, it is necessary that the traps are shallow and uniformly distributed. This ensures that the charge carriers can move freely without significant hindrance from deep or non-uniform trap distributions."}