کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
702907 | 1460816 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Photovoltage effects in polypyrrole–diamond nanosystem Photovoltage effects in polypyrrole–diamond nanosystem](/preview/png/702907.png)
Thin films of polypyrrole (PPy) are electrochemically polymerized in the thickness 25 nm on hydrogen-terminated intrinsic diamond surface exhibiting two-dimensional surface conductivity of 5 × 10− 5 (S/). Opto-electronic properties of the system are characterized by Kelvin force microscopy detecting surface potentials. Shifts of the surface potentials of diamond and PPy under visible light illumination are attributed to sub- and super-band gap surface photovoltage effects changing energetic band bending in the range of 100–200 meV. We present a model considering influence of diamond surface termination, surface states and highly resistive bulk properties as well as excitonic transport in PPy. The model suggests a charge transfer between PPy and diamond.
Journal: Diamond and Related Materials - Volume 18, Issues 2–3, February–March 2009, Pages 249–252