NOVEL NITROGEN-CONTAINING HETEROCYCLIC COMPOUND, ELECTRON TRANSPORT MATERIAL COMPRISING THE SAME, AND ORGANIC LIGHT-EMITTING ELEMENT AND SOLAR CELL CONTAINING THE SAME

PROBLEM TO BE SOLVED: To provide a nitrogen-containing heterocyclic compound having excellent π-conjugated property, solubility, film-forming property, and stability.SOLUTION: Provided is a nitrogen-containing heterocyclic compound represented by a formula (1), which is useful as a material for solar cells and the like. [R, R, R, R, R, R, R, and Rare each independently H, F, Br, and Cl; Rto Rare each independently are H, F, Cl, an alkyl group, an aryl group, an amino group, and the like; and a to d are an integer of 0 or 1, where 2≤a+b+c+d≤4.]SELECTED DRAWING: None 【課題】π共役性、溶解性、成膜性、及び安定性に優れる含窒素複素環化合物の提供。【解決手段】式（１）で示される太陽電池等の材料として有用な含窒素複素環化合物。［Ｒ１〜Ｒ６、Ｒ１１、Ｒ１２、Ｒ２１、Ｒ２２、Ｒ３１、Ｒ３２、Ｒ４１、及びＲ４２は各々独立にＨ、Ｆ、Ｂｒ、Ｃｌ；Ｒ１〜Ｒ６は各々独立にＨ、Ｆ、Ｃｌ、アルキル基、アリール基、アミノ基等；ａ〜ｄは０又は１の整数、２≦ａ＋ｂ＋ｃ＋ｄ≦４；］【選択図】なし