THIN FILM AND ORGANIC ELECTROLUMINESCENT ELEMENT
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United States of America Patent
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May 23, 2019
app pub date -
Nov 22, 2016
filing date -
Nov 22, 2016
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Abstract
The objective of the invention is to provide a thin film having a long light-emitting life span, and an organic electroluminescence element. The above problem is solved by the thin film containing a light-emitting metallic complex and a host, the light-emitting metallic complex being represented by general formula (1) and satisfying formula (1), and the host being: a nonmetallic organic compound demonstrating phosphorescent light-emission at room temperature; a compound demonstrating heat activated-type delayed fluorescence; or a compound exhibiting an inverse intersystem crossing phenomenon between a singlet excitation state demonstrating a level higher than the lowest singlet excitation state, and a triplet excitation state demonstrating a level higher than the lowest triplet excitation state.
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