| abstract |
An electroluminescent element (1) includes a QD layer (15) and a hole transport layer (14). QD phosphor particles contained in the QD layer (15) are nanocrystals comprising zinc and selenium or zinc, selenium, and sulfur. The QD phosphor particles have a fluorescence full width at half maximum of 25 nm or less and a fluorescence peak wavelength of 410 to 470 nm. The hole transport layer (14) comprises poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4'-(N-(4-sec-butylphenyl)diphenylamine)]. The hole transport layer (14) has a thickness of 10 to 57 nm. |