US 11,991,920 B2
Organic-inorganic perovskite, film, light-emitting film, delayed fluorescence-emitting film, light-emitting element, and method for producing light-emitting element
Chuanjiang Qin, Fukuoka (JP); Toshinori Matsushima, Fukuoka (JP); and Chihaya Adachi, Fukuoka (JP)
Assigned to KYULUX, INC., Fukuoka (JP)
Filed by KYULUX, INC., Fukuoka (JP)
Filed on Jan. 5, 2023, as Appl. No. 18/150,476.
Application 18/150,476 is a division of application No. 16/761,667, abandoned, previously published as PCT/JP2018/040758, filed on Nov. 1, 2018.
Claims priority of application No. 2017-213911 (JP), filed on Nov. 6, 2017.
Prior Publication US 2023/0157149 A1, May 18, 2023
Int. Cl. C07F 7/24 (2006.01); C09K 11/06 (2006.01); H10K 85/30 (2023.01); H10K 50/11 (2023.01); H10K 102/00 (2023.01)
CPC H10K 85/30 (2023.02) [C07F 7/24 (2013.01); C09K 11/06 (2013.01); C09K 2211/1007 (2013.01); C09K 2211/1011 (2013.01); H10K 50/11 (2023.02); H10K 2102/351 (2023.02)] 3 Claims
OG exemplary drawing
 
1. An electroluminescent device having an anode, a cathode, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer is composed of an organic-inorganic perovskite satisfying the following requirements (1) and (2) and represented by the formula (A) below:
ET<ET1  (1)
ES-ET≤0.1 eV  (2)
wherein ES represents an excited singlet energy level in emission of an inorganic component constituting the organic-inorganic perovskite, ET represents an excited triplet energy level in emission of an inorganic component constituting the organic-inorganic perovskite, ET1 represents an excited triplet energy level in emission of an organic component constituting the organic-inorganic perovskite
PEA2FAn−1PbnBr3n+1  (A)
wherein PEA represents a phenylethylammonim, FA represents a formamidinium, and n is 8.