Highly efficient organic ultraviolet photodetectors based on a Cu(I) complex

• Published in: Synthetic metals Vol. 160; no. 21; pp. 2260 - 2264
• Main Authors: Xu, Zhanlin, Xu, Chunhui, Wang, Qingwei, Jiang, Wenlong, Liu, Chunbo, Liu, Lihui, Liu, Mei, Li, Wenlian, Che, Guangbo, Shi, Fanian
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2010; Elsevier
• Subjects: Applied sciences; Charge transfer; Cu(I) complex; Decay; Electron mobility; Electronics; Exact sciences and technology; High electron mobility; Illumination; Optoelectronic devices; Photocurrent; Photodetectors; Photoelectric effect; Photoluminescence quenching; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Ultraviolet; Ultraviolet photodetectors; Ultraviolet photodetectors; High electron mobility; Cu(I) complex; Photoluminescence quenching; Photoluminescence; Copper complex; Photodetector; Amine; Ultraviolet detector; Luminescence quenching; Electron mobility; Charge transfer compound; Performance; Charge transfer; Organic compounds
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2010.08.017

We demonstrate high response visible-blind organic ultraviolet photodetector (UV-PD) using 4,4′,4″-tris[3-methyl-pheny(phenyl)amino]triphenylamine (m-MTDATA) and a novel Cu(I) complex, [Cu(1,2-bis(diphenylphosphino)benzene)(bathocuproine)]BF 4 (CuBB) to act as the electron donor and acceptor, respectively. CuBB behaves high electron mobility and the optimized PD offers a photocurrent up to 173 μA/cm 2 at −10 V, corresponding to a response of 251 mA/W under an illumination of 365 nm UV light. We attribute the high response to the high electron transport ability of CuBB, the suppression of radiative decay of m-MTDATA and efficient charge transfer from m-MTDATA to CuBB.