申请人:HODOGAYA CHEMICAL CO., LTD. 호도가야 가가쿠 고교 가부시키가이샤(519980964136)
公开号:KR20150123264A
公开(公告)日:2015-11-03
하기 일반식 (1)로 나타내지는 나프토트리아졸 유도체: 식 중, Ar는, 방향족 탄화수소기 또는 방향족 복소환기를 나타내고, A는, 방향족 복소환기를 포함한 기임. 상기 화합물은 우수한 전자 주입/수송 능력, 높은 정공 저지능 및 박막형태에서 높은 안정성을 나타내며, 고효율 및 내구성이 높은 유기 전계 발광소자의 재료로 사용 가능하다.
The present specification relates to an organic electroluminescent device comprising: a first electrode; a second electrode; and an organic material layer provided between the first electrode and the second electrode, wherein the organic material layer comprises a light emitting layer and an electron transfer layer, the light emitting layer comprises a first host material, a second host material and a dopant material, the first host material has a HOMO energy level of −5.9 eV or lower, and the second host material has a HOMO energy level higher than a HOMO energy level of the first host material by 0.1 eV to 0.2 eV.
Visible-to-ultraviolet photon upconversion (UC) based on triplet–triplet annihilation was demonstrated in metal-free glassy solid films consisting of an organoboron photosensitizer and diphenylnaphthalene-based emitter. Upon photoexcitation at 445 nm, UC emissions in the ultraviolet region (370–390 nm) were observed in binary solid films with high UC efficiencies of up to 2.6% and a threshold excitation