Low dark current inverted organic photodetectors employing MoOx:Al cathode interlayer
作者： Dong-Seok Leem , Kwang-Hee Lee , Young-Nam Kwon , Dong-Jin Yun , Kyung-Bae Park
DOI: 10.1016/J.ORGEL.2015.05.044
关键词: Cathode 、 Optoelectronics 、 Photodetector 、 Electrode 、 Quantum efficiency 、 Chemistry 、 Visible spectrum 、 Surface energy 、 Optics 、 Dark current 、 Diode
摘要: Abstract We report low dark current small molecule organic photodetectors (OPDs) with an inverted geometry for image sensor applications. Adopting a very thin MoOx:Al cathode interlayer (CIL) in the OPD reflective top electrode results remarkably density (Jd) of 5.6 nA/cm2 at reverse bias 3 V, while maintaining high external quantum efficiency (EQE) 56.1% visible wavelengths. The effectiveness CIL on diode performance has been further identified by application to OPDs semi-transparent electrode, leading significantly Jd 0.25 nA/cm2, moderately EQE540 nm 25.8%, and subsequently detectivity 8.95 × 1012 Jones 3 V. Possible origins reduced currents using are described terms change interfacial energy barrier surface morphology.
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