Green Fluorescent Organic Light Emitting Device with High Luminance

• Published in: Sensors & transducers Vol. 172; no. 6; p. 202
• Main Authors: Yang, Ning, Shi, Yikai, Yuan, Xiaoqing, Wang, Wendong
• Format: Journal Article
• Language: English
• Published: Toronto IFSA Publishing, S.L 01.06.2014
• Subjects: Aluminum; COPPER PHTHALOCYANINE; Current efficiency; Devices; Diodes; Efficiency; ELECTRONIC PRODUCTS; Glass substrates; Indium tin oxide; Light emitting; Luminance; ORGANIC COMPOUNDS; Power efficiency; Transducers
• ISSN: 2306-8515; 1726-5479

In this work, researchers fabricated a small molecule green fluorescent bottom-emission organic light emitting device with the configuration of glass substrate; indium tin oxide; Copper Phthalocyanine (CuPc) 25 nm; N,N'-di(naphthalen-l-yl)-N,N'-diphenyl-benzidine 45 nm; tris(8-hydroxyquinoline) aluminium (Alq^sub 3^) 60 nm; Lithium fluoride 1 nm; and Aluminum (Al) 100 mn, where CuPc and NPB are the hole injection layer and the hole transport layer, respectively. CuPc is introduced in this device to improve carrier injection and efficiency. The experimental results indicated that the turn-on voltage is 2.8 V with a maximum luminance of 23,510 cd/m^sup 2^ at 12 V. The maximum current efficiency and power efficiency are 4.8 cd/A at 100 cd/m^sup 2^ and 4.2 lm/W at 3 V, respectively. The peak of electroluminance spectrum locates at 530 mn which is a typical emission peak of green light. In contrast, the maximum current efficiency and power efficiency of the device without CuPc are only 4.0 cd/A at 100 mA/cm^sup 2^ and 4.2 lm/W at 3.6 V, respectively.