Semiconductor nanoparticle, and color conversion panel and electronic device including the same

Semiconductor nanoparticles comprising silver, a Group 13 metal, and a chalcogen element,

• wherein the Group 13 metal comprises indium and gallium,
• wherein the chalcogen element comprises sulfur and optionally selenium,
• wherein the semiconductor nanoparticles are configured to emit a green light,
• wherein the green light has an emission peak wavelength of greater than or equal to about 500 nanometers and less than or equal to about 580 nanometers,
• wherein the green light exhibits a full width at half maximum of greater than or equal to about 5 nanometers and less than or equal to about 70 nanometers,
• wherein the semiconductor nanoparticles are configured to exhibit a quantum yield of greater than or equal to about 50%,
• wherein the semiconductor nanoparticles comprises:
• a mole ratio of a sum of indium and gallium to silver (In+Ga):Ag of greater than or equal to 1.25:1 and less than or equal to 2.6:1;
• wherein the semiconductor nanoparticle has a core-shell structure including a core and a shell disposed on the core, and the core includes silver, indium, and sulfur, and does not include gallium,
• wherein in a photoluminescence spectrum of the semiconductor nanoparticles, a relative band-edge emission intensity as defined by the following equation is greater than 20:
• relative band-edge emission intensity=A1/A2
• wherein, A1 is an intensity of the spectrum at an emission peak wavelength, and
• A2 is a maximum intensity of the spectrum in a wavelength range of the emission peak wavelength plus greater than or equal to 80 nanometers.