Determination of energy band diagram and charge carrier mobility of white emitting polymer from optical, electrical and impedance spectroscopy

作者：Sarjidan M A Mohd^*; Mokhtar H A Mohd; Abd Majid W H

来源：Journal of Luminescence, 2015, 159: 134-138.

DOI：10.1016/j.jlumin.2014.11.007

• White polymer light emitting device
• Energy band diagram
• Charge carrier mobility
• Optical
• Electrical
• Impedance spectroscopy

A single-layer white polymer light-emitting device (WPLED) has been fabricated using spin coating technique. The device was constructed as ITO/PEDOT:PSS(50 nm)/SPW-111(50 nm)/LiF(1 nm)/Al (100 nm). Indium tin oxide (ITO) and poly(3,4-ethylenedioxythiophene) Polystyrene sulfonate (PEDOT: PSS) are used as the transparent anode. SPW-111 is fabricated as a white emissive layer and lithium fluoride (LiF) and aluminum (Al) are used as reflecting cathode. Energy band diagram of the device was estimated from a combination of ultraviolet-visible (UV-vis) and current-voltage (J-V) analyses. Charge carrier mobility (mu) of PLED was evaluated using negative differential susceptance (-Delta B) method from impedance spectroscopy (IS) analysis. The calculated mu of the SPW-111 device is in the magnitude of 10(-6) cm(2)/v/s.

• 出版日期2015-3