Film and organic light-emitting device containing perovskite-type compound and organic light-emitting material
Using a perovskite-type compound, an inexpensive host material having a high carrier mobility can be provided. Using a perovskite-type compound as a host material, an inexpensive organic light-emitting device having a high emission efficiency can be realized.
1. A film comprising a perovskite-type compound and an organic light-emitting material, wherein the perovskite-type compound is represented by the following general formula (4):
A 3 BX 3 (4)
wherein A 3 represents an organic cation, B represents a divalent metal ion, X represents a halide ion, and three X's may be the same as or different from each other.
2. The film according to claim 1 , wherein carrier mobility of the perovskite-type compound is 10 −2 to 10 3 cm 2 V −1 s −1 .
3. The film according to claim 1 , wherein the organic light-emitting material emits light by the energy having transferred from the perovskite-type compound.
4. The film according to claim 1 , wherein the organic light-emitting material is a compound having a coumarin skeleton.
5. The film according to claim 1 , wherein the inclination of a single logarithmic chart on a graph where the horizontal axis indicates a common logarithm of an excitation light intensity irradiating the film and the vertical axis indicates a photoluminescence quantum yield of the film is positive.
6. An organic light-emitting device having a light-emitting layer that comprises a perovskite-type compound and an organic light-emitting material, wherein the perovskite-type compound is represented by the following general formula (4):
A 3 BX 3 (4)
wherein A 3 represents an organic cation, B represents a divalent metal ion, X represents a halide ion, and three X's may be the same as or different from each other.
7. The organic light-emitting device according to claim 6 , which is an organic electroluminescent device.
8. The organic light-emitting device according to claim 6 , wherein the organic light-emitting material emits light by the energy having transferred from the perovskite-type compound.
9. The organic light-emitting device according to claim 6 , wherein the organic light-emitting material is a compound having a coumarin skeleton.
10. The organic light-emitting device according to claim 6 , wherein the inclination of a single logarithmic chart on a graph where the horizontal axis indicates a common logarithm of an excitation light intensity irradiating the device and the vertical axis indicates a photoluminescence quantum yield of the device is positive.