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Meet the new faces of ADEM
ADEM Newsletter # 15 / October 2014
ADEM PhD publishes in Nature Communications
Michiel Aerts, student at TU Delft and member of our PhD committee draws attention with an article in the prestigious magazine Nature Communications: 'Highly efficient carrier multiplication in PbS nanosheets', about a new nanostructured material.
ADEM knowledge and ADEM facility in a really innovative project!
Lead Sulphide nanosheets
He and his colleagues* at TU Delft and Hamburg University are investigating methods to increase the efficiency of solar cells by carrier multiplication; generating two or more electrons by the absorption of one single photon. The researchers composed a new nanostructured material, Lead sulphide nanosheets, in which the carrier multiplication occurs with close to maximum efficiency.
Using ultrafast laser spectroscopy (an ADEM facility using a ultrafast Ti:sapphire laser), the number of excited electrons per absorbed photon was counted. They demonstrated that, above a threshold energy, nearly all of the excess energy can be used to generate extra charges.

Michiel: "Since the article was published we are working on another important electronic property for solar cell materials; the mobility and lifetime of excited charges. This is the next step in characterizing this new material".
The lead sulphide nanosheets are however not yet the ideal solar cell material: the energetic threshold, which needs to be overcome for efficient carrier multiplication to happen, is still too high to use a large part of the solar spectrum. So now the search continues: finding materials which are just as good at carrier multiplication, but start the process at a lower threshold.
Conventional solar cells are limited by what is called the Shockley-Queisser limit: of all the power contained in sunlight falling on an ideal solar cell, in a single-bandgap solar cell only approximately one third of that could ever be turned into electricity. Ever since this fundamental limit was first calculated in 1962, scientists have been trying to surpass it.

For the complete article click here
More information: Michiel Aerts, Optoelectronic Materials Section, Chemical Engineering,

* M. Aerts, T. Bielewicz, C. Klinke, F.C. Grozema, A.J. Houtepen, J.M. Schins and L.D.A. Siebbeles
New faces and projects in ADEM
Luc Raijmakers
Luc Raijmakers received his BSc degree at the HTS Autotechniek in Arnhem and MSc degree in Automotive Technology at the Eindhoven University of Technology. For his MSc degree he graduated on the topic of sensorless temperature measurements in Li-ion batteries. Luc currently works towards a PhD degree by continuing the research on this topic. Sensorless temperature measurements are based on electrochemical impedance spectroscopy. Although impedance spectroscopy is already a well-known method for Li-ion battery analysis, sensorless temperature indication is rather novel. Therefore Luc is performing his research at Delft University of Technology in collaboration with our ADEM partner NXP in Eindhoven.
Petra Dal
Since March this year Petra Dral is working on a research project about organically modified silicas. These hybrids combine strengths of both organic and inorganic materials, such as the high thermal and chemical stability of silica and the molecular flexibility and water stability of organics. The general aim of this research project is to expand the understanding and engineering possibilities of hybrid silicas; it involves molecular design (nature and location of organic groups in the silica network) as well as processing aspects (microstructure, environmental factors, patterning).
The project is hosted by the Inorganic Materials Science group at the University of Twente, whereshe studied chemical engineering from 2007-2013.
Yaolin Xu
Yaolin Xu got his Bachelor degree of Science in Physics in China. He came to study in TU Delft in 2011 and obtained a Master degree of Science in Sustainable Energy Technology. July 2013 he completed his Master thesis on Mg based Ni-MH battery and a research on Molecular Layer Deposition on nanoparticles. He works on an ADEM project on Si based anode materials of high capacity Li-ion battery in Department of Chemical Engineering, TU Delft since 1 January 2014.
Peter-Paul Harks
Peter-Paul Harks studied physics at the Utrecht University, where his master project concerned CVD of metal(-oxide) nanostructures. As of the first of July 2014, Peter-Paul is working as a PhD student within the ADEM program, in the Materials for Energy Conversion and Storage group at the TU Delft, under the supervision of prof. Fokko Mulder. His research involves multiple aspects of next generation Li-ion batteries, such as new anode materials and solid-state electrolytes.
Bridge Deck
Jaarverslag 2014
New Focus for ADEM Annual Report 2014
The ADEM Steering Committee has approved the annual report 2013. The report shall be presented to the Programme Board for review. The review is a requirement for the financial ADEM contribution provided by Ministry of Economic Affairs. The progress of the research of the PhD-students is key in the Annual Report 2013. The ADEM investments in infrastructure and the cooperation with industrial partners are mainly presented in the introductions to the themes. The upcoming Annual Report 2014 will give more prominence to shared facilities and to main industrial partners in ADEM.
Green Deal Monitor
The Green Deal Monitor No. 24 (ADEM)
Netherlands Enterprise Agency (Rijksdienst voor Ondernemend Nederland) monitors the progress of the Green Deal Materials for Energy Applications (ADEM). The Green Deal Monitor has a focus on demand steering of material research and on joint development and sharing of research facilities by industry and academia. The Annual Green Deals Report to the Dutch Parliament draws for ADEM from this monitor. The Green Deal context offers ADEM partners a platform for exposure.
Approval of three investment proposals
The Steering Committee has approved three investment proposals: the laser beam manipulation system (UT-I08), the Environmental AFM-STM (TUD-I02) and (transferred from TU/e to TU Delft) the Combinatorial Sputter Deposition (TUE-I04). For the last setup is a contribution of €550,000 available. Binding condition for the actual start of these investments is the prior demonstration of the targeted industrial contribution of 10% in the program of the respective Themes (Solar Energy, CMS, and Batteries, respectively).
Call to fill PhD-student vacancies before end of 2014
The Theme coordinators are invited to fill the allocated AIO positions before the end of this year. ADEM will request the Ministry of Economic Affairs extension of the program until 2018. This formal extension is necessary for the financial support of the last year of new AIO appointments.
Appointment new Theme coordinators for Heat and for CMS
The Steering Committee has appointed Theo van der Meer Theme coordinator Heat and Louis Winnubst appointed Theme coordinator CMS. The Steering Committee expresses its appreciation for the withdrawing coordinators Arian Nijmeijer and Anton van Steenhoven, for the development and consolidation of the theme programs.
Developing materials research / opportunity for ADEM II
The future of the Dutch materials research is high on the agenda of the Netherlands Energy Research Alliance (NERA*). Materials research is a key enabler for innovation. Apart from ADEM and a few isolated initiatives, the Top-sector Energy lacks a well-coordinated materials research program. Top-sector and NERA context offers chances for harmonization of energy materials research and the possible reintroduction of the Dutch innovation fund offers opportunities for an ADEM II. ADEM II will be the subject of discussion at the joint meeting of the Steering Committee and Theme coordinators late November.
Herman Schoffelen, 20 October 2014

* The NERA is an alliance of the major Dutch public knowledge institutes active in energy: University of Twente, TU Delft, TU Eindhoven, FOM, ECN and TNO. The objectives of the NERA are:
1. Creating a network with the aim to make optimal use of the knowledge and experience of the NERA-partners.
2. Stimulating energy cooperation in research and innovation in the Netherlands and Europe.
3. Stimulating stronger interaction between industry, government and research partners.
4. Influencing the European energy agenda: the NERA represents the Netherlands in the European Energy Research Alliance (EERA).
ADEM Partners
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