Abstract: An organic electroluminescent element including at least three light-emitting units. The at least three light-emitting units include one or more short-wavelength light-emitting units having a weighted average emission wavelength ?S of 380 or more and less than 550 nm, and two or more long-wavelength light-emitting units having a weighted average emission wavelength ?S of 550 nm or more and 780 nm or less. The two or more long-wavelength light-emitting units are greater in number than the one or more short-wavelength light-emitting units.

Abstract: The objective is to provide an organic electroluminescent element with an improved luminous efficiency. The organic electroluminescent element has a structure in which a first light-emitting unit containing a phosphorescent red light-emitting material, a second light-emitting unit containing a phosphorescent yellow light-emitting material, and a third light-emitting unit containing a fluorescent blue light-emitting material are stacked with interlayers in-between. A peak emission wavelength of the phosphorescent yellow light-emitting material is in a range of 530 nm to 570 nm. A peak emission wavelength of the fluorescent blue light-emitting material is in a range of 440 nm to 480 nm. The organic electroluminescent element has a ratio of a yellow emission intensity to a blue emission intensity in a range of 1.0 to 2.0. The organic electroluminescent element further has a ratio of a red emission intensity to the blue emission intensity in a range of 1.5 to 3.0.

Abstract: The disclosure relates to an organic electroluminescence element including an organic layer including multiple light-emitting layers. The light-emitting layers include a blue light-emitting layer including a blue light-emitting dopant. In a case where emission color of the organic electroluminescence element operated at an operation temperature for a stable state is represented in a CIE1931 chromaticity coordinate system, when coordinate point A of the emission color at an early stage of use and coordinate point B of the emission color deteriorated by use are represented by (x1, y1) and (x2, y2) respectively, a relation of y2?y1 is satisfied. When amounts of changes in x and y values from coordinate point A to coordinate point B are represented by equations of ?x=x2?x1 and ?y=y2?y1 respectively, a relation of ?y??x is satisfied.

Abstract: The objective is to provide an organic electroluminescent element with an improved luminous efficiency. The organic electroluminescent element has a structure in which a first light-emitting unit containing a phosphorescent red light-emitting material, a second light-emitting unit containing a phosphorescent yellow light-emitting material, and a third light-emitting unit containing a fluorescent blue light-emitting material are stacked with interlayers in-between. A peak emission wavelength of the phosphorescent yellow light-emitting material is in a range of 530 nm to 570 nm. A peak emission wavelength of the fluorescent blue light-emitting material is in a range of 440 nm to 480 nm. The organic electroluminescent element has a ratio of a yellow emission intensity to a blue emission intensity in a range of 1.0 to 2.0. The organic electroluminescent element further has a ratio of a red emission intensity to the blue emission intensity in a range of 1.5 to 3.0.

Abstract: An organic electroluminescent element including at least three light-emitting units. The at least three light-emitting units include one or more short-wavelength light-emitting units having a weighted average emission wavelength ?S of 380 or more and less than 550 nm, and two or more long-wavelength light-emitting units having a weighted average emission wavelength ?S of 550 nm or more and 780 nm or less. The two or more long-wavelength light-emitting units are greater in number than the one or more short-wavelength light-emitting units.

Abstract: An organic electroluminescence element has a multi-unit structure which includes a first light-emitting unit, an intermediate layer and a second light-emitting unit. A light-emitting layer of the first light-emitting unit includes a blue light-emitting material. The second light-emitting unit has a stacked structure of light-emitting layers in which a red light-emitting layer including a red light-emitting material and a green light-emitting layer including a green light-emitting material are stacked. One of the red light-emitting layer and the green light-emitting layer is closer to the positive electrode than the other of the red light-emitting layer and the green light-emitting layer, and includes a hole-transporting material as a host material. The other of the red light-emitting layer and the green light-emitting layer is closer to the negative electrode than the one of the red light-emitting layer and the green light-emitting layer, and includes an electron-transporting material as a host material.

Abstract: The object of the present invention is to provide an organic electroluminescent element suitable for both food lighting at a high temperature and indoor lighting at room temperature. The organic electroluminescent element according to the present invention has such characteristics that: an element temperature at which a general color rendering index Ra has its maximum in an element temperature range of 5° C. to 60° C. is present in a range of 15° C. to 35° C.; and an element temperature at which at least one of a color rendering index R8 a special color rendering index R9, a special color rendering index R14, and a special color rendering index R15 has its maximum in the element temperature range of 5° C. to 60° C. is in a range of temperatures higher than the element temperature at which the general color rendering index Ra has its maximum.

Abstract: The object of the present invention is to provide an organic electroluminescent element suitable for both food lighting at a low temperature and indoor lighting at room temperature. The organic electroluminescent element according to the present invention has such characteristics that a maximum of a general color rendering index Ra in a range of an element temperature of 5° C. to 60° C. is present in a range of the element temperature of 15° C. to 35° C. and that at least one of maxima of special color rendering indexes R10, R11, R12, and R13 in the range of the element temperature of 5° C. to 60° C. is present in a range of the element temperature of 5° C. to 35° C.

Abstract: The disclosure relates to an organic electroluminescence element including an organic layer including multiple light-emitting layers. The light-emitting layers include a blue light-emitting layer including a blue light-emitting dopant. In a case where emission color of the organic electroluminescence element operated at an operation temperature for a stable state is represented in a CIE1931 chromaticity coordinate system, when coordinate point A of the emission color at an early stage of use and coordinate point B of the emission color deteriorated by use are represented by (x1, y1) and (x2, y2) respectively, a relation of y2?y1 is satisfied. When amounts of changes in x and y values from coordinate point A to coordinate point B are represented by equations of ?x=x2?X1 and ?y=y2?y1 respectively, a relation of ?y??x is satisfied.

Abstract: The present invention proposes a white organic electroluminescent element which is a multiunit element capable of emitting high intensity light that is important to a light source for lighting use, and can have an extended lifetime while suppressing deterioration in luminance.

Abstract: The object of the present invention is to provide an organic electroluminescent element suitable for both food lighting at a high temperature and indoor lighting at room temperature. The organic electroluminescent element according to the present invention has such characteristics that: an element temperature at which a general color rendering index Ra has its maximum in an element temperature range of 5° C. to 60° C. is present in a range of 15° C. to 35° C.; and an element temperature at which at least one of a color rendering index R8 a special color rendering index R9, a special color rendering index R14, and a special color rendering index R15 has its maximum in the element temperature range of 5° C. to 60° C. is in a range of temperatures higher than the element temperature at which the general color rendering index Ra has its maximum.

Abstract: The object of the present invention is to provide an organic electroluminescent element that suitable for food lighting and indoor lighting at room temperature. The emission spectrum of light emitted from the organic electroluminescent element according to the present invention has peaks in red, green, and blue regions, respectively. Of the proportions of the maximum to the minimum of the intensity of the peak in the red, green, and blue regions at an element temperature in a range of 5° C. to 60° C., the proportion of the maximum to the minimum of the intensity of the peak in the green region is the highest, and the intensity of the peak in the green region decreases with an increase in the element temperature.

Abstract: The object of the present invention is to provide an organic electroluminescent element suitable for both food lighting at a low temperature and indoor lighting at room temperature. The organic electroluminescent element according to the present invention has such characteristics that a maximum of a general color rendering index Ra in a range of an element temperature of 5° C. to 60° C. is present in a range of the element temperature of 15° C. to 35° C. and that at least one of maxima of special color rendering indexes R10, R11, R12, and R13 in the range of the element temperature of 5° C. to 60° C. is present in a range of the element temperature of 5° C. to 35° C.

Abstract: The present invention proposes a white organic electroluminescent element which is a multiunit element capable of emitting high intensity light that is important to a light source for lighting use, and can have an extended lifetime while suppressing deterioration in luminance.