- document
-
Eijt, S.W.H. (author), De Krom, T. W.H. (author), Chaykina, D. (author), Schut, H. (author), Colombi, G. (author), Cornelius, S. (author), Egger, W. (author), Dickmann, M. (author), Dam, B. (author)Doppler broadening positron annihilation spectroscopy depth profiles were collected on photochromic YO<sub>x</sub>H<sub>y</sub> thin films. In situ UV illumination of photochromic semiconductor YO<sub>x</sub>H<sub>y</sub> films leads to an increase in S-parameter and a large reduction in W-parameter, possibly caused by a change in the charge...journal article 2020
- document
-
Eijt, S.W.H. (author), Shi, W. (author), Mannheim, A. (author), Butterling, M. (author), Schut, H. (author), Egger, W (author), Dickmann, M. (author), Hugenschmidt, C (author), Shakeri, B. (author), Meulenberg, R.W. (author), Callewaert, V. (author), Saniz, R (author), Partoens, B (author), Barbiellini, B (author), Bansil, A (author), Melskens, J. (author), Zeman, M. (author), Smets, A.H.M. (author), Kulbak, M. (author), Hodes, G. (author), Cahen, D. (author), Brück, E.H. (author)Recent studies showed that positron annihilation methods can provide key insights into the nanostructure and electronic structure of thin film solar cells. In this study, positron annihilation lifetime spectroscopy (PALS) is applied to investigate CdSe quantum dot (QD) light absorbing layers, providing evidence of positron trapping at the...journal article 2017
- document
-
Chai, L. (author), Al-Sawai, W. (author), Gao, Y. (author), Houtepen, A.J. (author), Mijnarends, P.E. (author), Barbiellini, B. (author), Schut, H. (author), Van Schaarenburg, L.C. (author), Van Huis, M.A. (author), Ravelli, L. (author), Egger, W. (author), Kaprzyk, S. (author), Bansil, A. (author), Eijt, S.W.H. (author)Positron annihilation lifetime spectroscopy and positron-electron momentum density (PEMD) studies on multilayers of PbSe nanocrystals (NCs), supported by transmission electron microscopy, show that positrons are strongly trapped at NC surfaces, where they provide insight into the surface composition and electronic structure of PbSe NCs. Our...journal article 2013
- document
-
Leegwater, H. (author), Schut, H. (author), Egger, W. (author), Baldi, A. (author), Dam, B. (author), Eijt, S.W.H. (author)We obtained evidence for the partial chemical segregation of as-deposited and hydrogenated Mg1?yTiy films (0 ? y ? 0.30) into nanoscale Ti and Mg domains using positron Doppler-broadening. We exclusively monitor the hydrogenation of Mg domains, owing to the large difference in positron affinity for Mg and Ti. The electron momentum distribution...journal article 2010