| 초록 |
Organic semiconductors are highly attractive materials for a variety of applications such as OLEDs, organic transistors, batteries, fuel cells, and organic photovoltaics because of benefits such as charge carrier mobilities and conductivities to minimize the resistance to charge transport. In solid state dye-sensitized solar cells based on organic semiconducting hole transporters (HTMs), while the transport properties of both the TiO2 electron transporting layer and the HTM have been quantified by time of flight and space charge limited current, it remains difficult to measure the charge transport properties in device-like architectures. We investigate a new technique to very simply calculate the charge carrier mobility as a function of the charge density for a variety of organic (P3HT, spiro-OMeTAD) and even metal-oxide semiconductors in an identical architecture of device, by employing transient absorption spectroscopy simultaneously with time resolved conductivity measurements. |
