Study of carrier energetics in ITO/P(VDF-TrFE)/pentacene/Au diode by using electric-field-induced optical second harmonic generation measurement and charge modulation spectroscopy
| Autor: | Mitsumasa Iwamoto, Takako Otsuka, Takaaki Manaka, Dai Taguchi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Condensed matter physics business.industry Energetics General Physics and Astronomy Second-harmonic generation 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Pentacene chemistry.chemical_compound chemistry Electric field 0103 physical sciences Optoelectronics Modulation spectroscopy 0210 nano-technology business Polarization (electrochemistry) Diode |
| Zdroj: | Journal of applied physics. 121 |
| Popis: | By using electric-field-induced optical second harmonic generation (EFISHG) measurement and charge modulation spectroscopy (CMS), we studied carrier behavior and polarization reversal in ITO/ poly(vinylidene fluoride trifluoroethylene) (P(VDF-TrFE))/pentacene/Au diodes with a ferroelectric P(VDF-TrFE) layer in terms of carrier energetics. The current-voltage (I–V) characteristics of the diodes showed three-step polarization reversal in the dark. However, the I–V was totally different under illumination and exhibited two-step behavior. EFISHG probed the internal electric field in the pentacene layer and accounted for the polarization reversal change due to charge accumulation at the pentacene/P(VDF-TrFE) interface. CMS probed the related carrier energetics and indicated that exciton dissociation in pentacene molecular states governed carrier accumulation at the pentacene/ferroelectric interface, leading to different polarization reversal processes in the dark and under light illumination. Combining EFISHG ... |
| Databáze: | OpenAIRE |
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