Light emitting devices having closely-spaced broad-spectrum and narrow-spectrum luminescent materials and related methods

A semiconductor light emitting device that emits light in at least a blue color range, a green color range, a yellow color range and a red color range, comprising:

• a light emitting diode (“LED”);
• and
• a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED, the recipient luminophoric medium including at least:
• a first luminescent material that down-converts a first portion of the radiation emitted by the LED to radiation having a first peak wavelength that is in the green or yellow color ranges;
• a second luminescent material that down-converts a second portion of the radiation emitted by the LED to radiation having a second peak wavelength that is in the red color range, the second luminescent material having a full-width half maximum bandwidth of at least 70 nanometers;
• a third luminescent material that down-converts a third portion of the radiation emitted by the LED to radiation having a third peak wavelength that is in the red color range and that is higher than the second peak wavelength, the third luminescent material having an emission peak that has a full-width half maximum bandwidth of less than 25 nanometers,
• wherein the second peak wavelength is within twenty (20) nanometers of the third peak wavelength,
• wherein the third luminescent material emits light having multiple distinct peaks in the red color range, and wherein a first of the multiple distinct peaks is at a wavelength that is less than the second peak wavelength, and a second of the multiple distinct peaks is at a wavelength that is greater than the second peak wavelength, and
• wherein the first and second of the multiple distinct peaks are the highest two of the multiple of the distinct peaks.

A semiconductor light emitting device, comprising:

• a light emitting diode (“LED”) that emits light having a peak wavelength in a blue color range;
• and
• a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED, the recipient luminophoric medium including at least:
• a YAG:Ce phosphor;
• a (Ca1-xSrx)SiAlN3:Eu2+ phosphor that down-converts a second portion of the radiation emitted by the LED to radiation having a second peak wavelength that is between 610 and 635 nm;
• an A2MF6:Mn4+ phosphor where A is an Alkali metal and M is an element with a 4+ valence that down-converts a third portion of the radiation emitted by the LED to radiation having a third peak wavelength that is between 625 and 640 nm, the third luminescent material having a full-width half maximum bandwidth of between 25 and 55 nm,
• wherein the second peak wavelength is within twenty (20) nanometers of the third peak wavelength,
• wherein the semiconductor light emitting device emits light having a CRI value of between 80 and 92, a CRI R9 value of between 30 and 70, a correlated color temperature of between 2700 K and 2850 K, and a Qg value of between 90 and 110,
• wherein an emission spectrum of the semiconductor light emitting device includes a first peak that is attributable to the A2MF6:Mn4+ phosphor that has a magnitude that is at least twice the magnitude of any point in emission spectrum in the yellow or green color ranges, and
• wherein the A2MF6:Mn4+ phosphor is at least 70% of the total weight of the combination of the YAG:Ce, A2MF6:Mn4+ and (Ca1-xSrx)SiAlN3:Eu2+ phosphors.