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Güneş, Mehmet (author), Melskens, Jimmy (author), Smets, A.H.M. (author)In this study, undoped hydrogenated amorphous silicon (a-Si:H) thin films deposited under moderate dilution ratios of silane by radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) have been investigated using steady-state photoconductivity and improved dual beam photoconductivity (DBP) methods to identify changes in multiple...journal article 2023
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Melskens, J. (author), Eijt, S.W.H. (author), Schouten, M. (author), Vullers, A.S. (author), Mannheim, Awital (author), Schut, H. (author), Macco, Bart (author), Zeman, M. (author), Smets, A.H.M. (author)The nanostructure of hydrogenated amorphous silicon (a-Si:H) is studied by means of doppler broadening positron annihilation spectroscopy (DB-PAS) and Fourier transform infrared (FTIR) spectroscopy. The evolution of open volume deficiencies is monitored during annealing, demonstrating that small vacancies and other small vacancy clusters that...journal article 2017
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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
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Melskens, J. (author), Schnegg, A. (author), Baldansuren, A. (author), Lips, K. (author), Plokker, M.P. (author), Eijt, S.W.H. (author), Schut, H. (author), Fischer, M. (author), Zeman, M. (author), Smets, A.H.M. (author)The structural and electrical properties of metastable defects in various types of hydrogenated amorphous silicon have been studied using a powerful combination of continuous wave electron-paramagnetic resonance spectroscopy, electron spin echo (ESE) decay measurements, and Doppler broadening positron annihilation spectroscopy. The observed...journal article 2015
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Demontis, V. (author), Sanna, C. (author), Melskens, J. (author), Santbergen, R. (author), Smets, A.H.M. (author), Damiano, A. (author), Zeman, M. (author)Thin oxide interlayers are commonly added to the back reflector of thin-film silicon solar cells to increase their current. To gain more insight in the enhancement mechanism, we tested different back reflector designs consisting of aluminium-doped zinc oxide (ZnO:Al) and/or hydrogenated silicon oxide (SiOx:H) interlayers with different metals ...journal article 2013