METHOD FOR PRODUCING MATERIAL FOR LIGHT EMITTING ELEMENT

PROBLEM TO BE SOLVED: To provide a method for synthesizing the material for high purity light emitting element so as to provide a light emitting element having a long service life.SOLUTION: Provided is a method for synthesizing the material for a light emitting element characterized in that, in the synthesis of the material for a light emitting element passing through an organic halide, the content of reaction by-products included in the material for a light emitting element specified by ultra-high-speed liquid chromatograph time-of-flight type mass analysis (UPLC/TOF-MS) before sublimation purification, and the halides of brome, iodine and chlorine as raw materials for synthesizing the material for a light emitting element is 3% or lower.SELECTED DRAWING: None 【課題】寿命の長い発光素子を提供すべく、高純度な発光素子用材料の合成方法を提供する。【解決手段】有機ハロゲン化物を経由した発光素子用材料の合成において、昇華精製処理前に、超高速液体クロマトグラフ飛行時間型質量分析（ＵＰＬＣ／ＴＯＦ−ＭＳ）により特定されてなる、前記発光素子用材料中に含まれる反応副生成物や、前記発光素子用材料を合成するための原料となる臭素、ヨウ素および塩素のハロゲン化物の含有率が、３％以下であることを特徴とする発光素子用材料の合成方法である。【選択図】なし