Charge transfer through amino groups-small molecules interface improving the performance of electroluminescent devices期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Charge transfer through amino groups-small molecules interface improving the performance of electroluminescent devices

Affiliation:	1. Electrical and Electronics Engineering, Toros University, Mersin, Turkey;2. Department of Engineering Sciences, Izmir Katip Celebi University, Izmir, Turkey;3. Department of Energy Systems Engineering, KMU, Karaman, Turkey;4. Department of Chemical Engineering, Selcuk University, Konya, Turkey;5. Department of Materials Science and Engineering, Izmir Kâtip Celebi University, Izmir, Turkey;6. Department of Physics, Ahi Evran University, Kırşehir, Turkey;7. Energy Department, Ege University, Izmir, Turkey;1. Key Laboratory of Photonic and Electric Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China;2. College of Information Science and Engineering, Northeastern University, Shenyang 110819, China;1. College of Physics, Qingdao University, 308 Ning-Xia Road, Qingdao 266071, China;2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;1. Institute of Lighting and Display Science/Department of Optics and Photonics, National Central University, Chung-Li 320, Taiwan;2. CNRS, Univ. Bordeaux ICMCB, UPR 9048, 33600 Pessac, France;1. Instituto de Física “Gleb Wataghin”/UNICAMP, Campinas, Brazil;2. Laboratório de Óptica, Faculdade de Tecnologia/UNICAMP, Limeira, SP, Brazil;3. Laboratório Nacional de Luz Síncrotron, Campinas, SP, Brazil;4. Instituto de Física, Universidade Federal de Goiás, Goiânia, GO, Brazil;5. Centre Spatial de Liège, Université de Liège, Belgium;1. Applied Physics Division, Soreq NRC, Yavne 81800, Israel;2. Department of Electrical Engineering—Physical Electronics, Faculty of Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel

Abstract:	A carboxylic group functioned charge transporting was synthesized and self-assembled on an indium tin oxide (ITO) anode. A typical electroluminescent device modified ITO/TPD (50 nm)/Alq₃ (60 nm)/LiF (2 nm)/(120 nm)] was fabricated to investigate the effect of the amino groups-small molecules interface on the characteristics of the device. The increase in the surface work function of ITO is expected to facilitate the hole injection from the ITO anode to the Hole Transport Layer (HTL) in electroluminescence. The modified electroluminescent device could endure a higher current and showed a much higher luminance than the nonmodified one. For the produced electroluminescent devices, the I-V characteristics, optical characterization and quantum yields were performed. The external quantum efficiency of the modified electroluminescent device is improved as the result of the presence of the amino groups-small molecules interface.

Keywords:	Charge transfer Electroluminescent device HOMO-LUMO level Self-assembled monolayers Amino groups
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