کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
79623 | 49362 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of indium and tin contamination on the efficiency and electronic properties of organic bulk hetero-junction solar cells Effect of indium and tin contamination on the efficiency and electronic properties of organic bulk hetero-junction solar cells](/preview/png/79623.png)
Organic photovoltaic devices using an electrode of indium tin oxide (ITO) coated with a buffer layer of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) exposed to controlled humidity during fabrication showed a 65–75% decrease in efficiency and displayed S-shaped J–V curves, changes, which are attributed to different levels of indium and tin migration into the PEDOT:PSS film. A distinct shift in the secondary electron cut-off in the UV Photoelectron spectra (UPS) of ITO/PEDOT:PSS samples exposed to controlled humidity indicate an increase of the dipole at the ITO/PEDOT:PSS interface, which could explain the appearance of S-shaped J–V curves. Additionally, the electron density at low binding energies is reduced for the humidity exposed PEDOT:PSS suggesting a second mechanism for decreased device performance.
.Figure optionsDownload as PowerPoint slideHighlights
► The efficiency of OPVs reduces significantly upon exposure to humidity.
► Humidity exposure of the ITO/PEDOT:PSS interface in OPVs leads to S-shaped J–V curves.
► S-shaped J–V curves indicate reduced charge transport over an interface.
► Electron spectroscopy shows changes in the interfacial properties.
Journal: Solar Energy Materials and Solar Cells - Volume 95, Issue 12, December 2011, Pages 3251–3255