Charge-transporting thin film
First Claim
1. A charge-transporting thin film containing at least two types of functional organic compounds having chiral elements, whereina total number of the chiral elements in each type of the functional organic compounds, summed over all the functional organic compounds, is four or more,the functional organic compounds comprise a metal complex and a host compound, the metal complex has two or more chiral elements in a single molecule, thereby comprising a mixture of enantiomers and diastereomers, and the host compound has two or more chiral elements in a single molecule, thereby comprising a mixture of enantiomers and diastereomers.
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Abstract
This invention addresses the problem of providing a charge-transporting thin film with small variations in properties due to disturbance and small variations in resistance over time during application of current. The invention further provides a charge-transporting thin film with a secondary effect of small variations over time and stable luminescent properties. The charge-transporting thin film of the present invention contains one or more types of functional organic compounds having chiral elements, and is characterized in that the total of the number of chiral elements per molecule in each type of the functional organic compounds summed over all types of the functional organic compounds is four or more.
11 Citations
14 Claims
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1. A charge-transporting thin film containing at least two types of functional organic compounds having chiral elements, wherein
a total number of the chiral elements in each type of the functional organic compounds, summed over all the functional organic compounds, is four or more, the functional organic compounds comprise a metal complex and a host compound, the metal complex has two or more chiral elements in a single molecule, thereby comprising a mixture of enantiomers and diastereomers, and the host compound has two or more chiral elements in a single molecule, thereby comprising a mixture of enantiomers and diastereomers.
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14. A charge transporting thin film containing one or more types of functional organic compounds having chiral elements in a single molecule, wherein
a total number of the chiral elements in each type of the functional organic compounds, summed over all the functional organic compounds, is four or more, the charge-transporting thin film contains the functional organic compounds having the chiral elements; - and
the thin film comprises a volatile organic material having a boiling point lower than 300°
C. under normal pressure, wherein the volatile organic material has an asymmetric carbon atom.
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Specification