Evaluation method and manufacturing method of light-emitting element material, manufacturing method of light-emitting element, light-emitting element, and light-emitting device and electric appliance having light-emitting element
US7505122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Apr 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/31
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an evaluation method for evaluating whether a light-emitting element material to be evaluated is suitable for a host material or a guest material. By carrying out a first step of measuring absorption intensity of a light-emitting element material and a second step of irradiating the light-emitting element material with light for a predetermined period of time, repeatedly; thereby a change in absorption intensity with time is evaluated so that whether the light-emitting material is suitable for a host material or a guest material can be distinguished. The light emitted to the light-emitting element material preferably has a wavelength component which is absorbed by a skeleton which contributes to excitation of the light-emitting element material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.