News Column

Findings from D.T. Nguyen and Colleagues Update Understanding of Chalcogens (Effect of the deposition conditions of NiO anode buffer layers in...

August 22, 2014



Findings from D.T. Nguyen and Colleagues Update Understanding of Chalcogens (Effect of the deposition conditions of NiO anode buffer layers in organic solar cells, on the properties of these cells)

By a News Reporter-Staff News Editor at Science Letter -- New research on Chalcogens is the subject of a report. According to news reporting originating in Bouguenais, France, by NewsRx journalists, research stated, "NiO thin films deposited by DC reactive sputtering were used as anode buffer layer in organic photovoltaic cells (OPVs) based on CuPc/C-60 planar heterojunctions. Firstly we show that the properties of the NiO films depend on the 02 partial pressure during deposition."

The news reporters obtained a quote from the research, "The films are first conductive between 0 and 2% partial oxygen pressure, then they are semiconductor and p-type between 2 and 6% partial oxygen pressure, between 6 and 9% partial oxygen pressure the conduction is very low and the films seem to ben-type and finally, for a partial oxygen pressure higher than 9%, the conduction is p-type. The morphology of these films depends also on the O-2 partial pressure. When the NiO films is thick of 4 nm, its peak to valley roughness is 6 nm, when it is sputtered with a gas containing 7.4% of oxygen, while it is more than double, 13.5 nm, when the partial pressure of oxygen is 16.67%. This roughness implies that a forming process, i.e. a decrease of the leakage current, is necessary for the OPVs. The forming process is not necessary if the NiO ABL is thick of 20 nm."

According to the news reporters, the research concluded: "In that case it is shown that optimum conversion efficiency is achieved with NiO ABL annealed 10 min at 400 degrees C."

For more information on this research see: Effect of the deposition conditions of NiO anode buffer layers in organic solar cells, on the properties of these cells. Applied Surface Science, 2014;311():110-116. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

Our news correspondents report that additional information may be obtained by contacting D.T. Nguyen, IRT Jules Verne, F-44340 Bouguenais, France. Additional authors for this research include A. Ferrec, J. Keraudy, J.C. Bernede, N. Stephant, L. Cattin and P.Y. Jouan (see also Chalcogens).

Keywords for this news article include: France, Europe, Bouguenais, Chalcogens

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Science Letter


Story Tools






HispanicBusiness.com Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters