%0 Journal Article %T Efficient Trilayer Phosphorescent Organic Light-Emitting Devices Without Electrode Modification Layer and Its Working Mechanism %A Haiwei Feng %A Jiaxin Zhang %A Letian Zhang %A Shihao Liu %A Wenfa Xie %A Xiaomei Peng %J Archive of "Nanoscale Research Letters". %D 2018 %R 10.1186/s11671-018-2668-1 %X a Capacitance¨Cvoltage¨Cluminance (C-V-L) characteristics of D1, D2, and D3. Orange solid line shows the turn-on voltage corresponding to the maximum of the first peak in their C-V characteristics. b Current density¨Cvoltage curves of the three devices in log¨Clog scale, additionally divided into three regions marked by purple dashed lines marked I, II, and III. The current density (J) and voltage (V) conform to the relationship of J ˇŘ aV %K Organic light-emitting device %K Trilayer %K Impedance spectroscopy %K Transient analysis %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6172164/