Electrical conduction and low voltage blue electroluminescence in vacuum-deposited organic films

Magneto-electroluminescence effects in the single-layer organic light-emitting devices with macrocyclic aromatic hydrocarbons

“…This reduction in the TTA process is known to be enhanced in crystalline organic semiconductors, as discussed in the context of anthracene. [17][18][19][20] Similar to the case of excitons in the crystalline phase of organic semiconductors, such an anthracene, the TTA process becomes more significant as the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) decreases, which is due to the energy of the singlet exciton being close to twice the energy of the triplet exciton. Thus, the TTA process may be diminished in amorphous molecular layers, such as those comprising the Me-CMPs; consequently, the negative MEL was not remarkable.…”

Disilanyl Double‐Pillared Bisanthracene: A Bipolar Carrier Transport Material for Organic Light‐Emitting Diode Devices

“…À50 8C). [3] However, the molecule was quickly replaced with aryl amine derivatives for the hole-transport layer (HTL), such as N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (a-NPD) and with tris(8-hydroxyquinoline)aluminum (Alq 3 ) for the electron-transport layer (ETL) after the discovery of layered organic light-emitting diodes (OLEDs) with superior performance and stability. [4,5] Although several derivatives for the emission layer (EML) were accumulated by varying functional groups at the 9-and 10-positions, [6] the further application of anthracene derivatives as carrier transport materials in layered OLEDs has been rarely explored, [7] despite the renewed interest in these materials for thin-film organic field-effect transistors (OFETs).…”

Emission Characteristics of Blue Fluorescence Tandem OLED Using MoOx

“…적층형 OLED란 두 개 이상의 단일구조 OLED 사 이에 전자와 정공의 산화환원반응으로부터 전자와 정 공이 생성되는 전하생성층 (Charge Generation Layer ; CGL)을 삽입하여 제작한 OLED이다. 이러한 전하 생성층의 구조에 따라 적층형 OLED의 특성이 변 하게 되어 전하생성층의 중요성이 대두되고 있다 [11][12][13][14] . 의 최대전류효율, 11.76 %의 최대양자효율을 가지 는 청색 OLED를 제작하였다.…”