Searched for: author:"Zhao, Y."
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Zhao, Y. (author), Mazzarella, L. (author), Procel Moya, P.A. (author), Han, C. (author), Yang, G. (author), Weeber, A.W. (author), Zeman, M. (author), Isabella, O. (author)
Hydrogenated nanocrystalline silicon oxide (nc-SiO<sub>x</sub>:H) layers exhibit promising optoelectrical properties for carrier-selective-contacts in silicon heterojunction (SHJ) solar cells. However, achieving high conductivity while preserving crystalline silicon (c-Si) passivation quality is technologically challenging for growing thin...
journal article 2020
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Procel Moya, P.A. (author), Xu, Haiyuan (author), Saez, Aurora (author), Ruiz Tobon, C.M. (author), Mazzarella, L. (author), Zhao, Y. (author), Han, C. (author), Yang, G. (author), Zeman, M. (author), Isabella, O. (author)
The contact resistivity is a key parameter to reach high conversion efficiency in solar cells, especially in architectures based on the so-called carrier-selective contacts. The importance of contact resistivity relies on the evaluation of the quality of charge collection from the absorber bulk through adjacent electrodes. The electrode...
journal article 2020
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Yao, Bimu (author), Yu, T. (author), Gui, Y. S. (author), Rao, J. W. (author), Zhao, Y. T. (author), Lu, W. (author), Hu, C. M. (author)
A magnon, the collective excitation of ordered spins, can spontaneously radiate a travelling photon to an open system when decaying to the ground state. However, in contrast to electric dipoles, magnetic dipoles by magnons are more isolated from the environment, limiting their radiation and coherent communication with photons. The recent...
journal article 2019
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Zhao, Y. (author)
As one of the most prominent examples of technology-enhanced learning, massive open online courses (MOOCs) have attracted extensive attention of learners, educators, and researchers since 2012. However, a low completion rate is a ubiquitous and severe problem in MOOCs, which means that only a small portion of learners got scores higher than or...
doctoral thesis 2019
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Özkol, E. (author), Procel Moya, P.A. (author), Zhao, Y. (author), Mazzarella, L. (author), Medlin, Rostislav (author), Šutta, Pavol (author), Isabella, O. (author), Zeman, M. (author)
Solar cells based on black silicon (b-Si) are proven to be promising in photovoltaics (PVs) by exceeding 22% efficiency. To reach high efficiencies with b-Si surfaces, the most crucial step is the effective surface passivation. Up to now, the highest effective minority carrier lifetimes are achieved with atomic layer-deposited Al<sub>2</sub>O...
journal article 2019
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Han, C. (author), Mazzarella, L. (author), Zhao, Y. (author), Yang, G. (author), Procel Moya, P.A. (author), Tijssen, M. (author), Bento Montes, A.R. (author), Isabella, O. (author), Zeman, M. (author)
Broadband transparent conductive oxide layers with high electron mobility (μ<sub>e</sub>) are essential to further enhance crystalline silicon (c-Si) solar cell performances. Although metallic cation-doped In<sub>2</sub>O<sub>3</sub> thin films with high μ<sub>e</sub> (&gt;60 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>) have been extensively...
journal article 2019
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Limodio, G. (author), D'Herouville, G. (author), Mazzarella, L. (author), Zhao, Y. (author), Yang, G. (author), Isabella, O. (author), Zeman, M. (author)
This work shows an alternative surface cleaning method for c-Si wafers to replace the standard chemical procedures as RCA or HNO <sub>3</sub> which involve hazardous chemicals or unstable processes. The method consists in a high-temperature oxidation treatment (HTO) performed in a classical tube furnace that incorporates organic and metal...
journal article 2019
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Zhao, Y. (author), Alderliesten, R.C. (author), Zhou, Zhengong (author), Fang, Guodong (author), Zhang, Jiazhen (author), Benedictus, R. (author)
In general, a finite width correction to stress intensity factor (SIF) is required in the fatigue crack growth. The finite width correction factor can be explained physically from the energy point of view. It is assumed that the finite width correction factor primarily constitutes an energy correction factor, i.e. it corrects the applied load...
journal article 2018
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Zhao, Y. (author), Robal, T. (author), Lofi, C. (author), Hauff, C. (author)
The use of mobile technology has become a part of our daily<br/>lives and enabled us to perform tasks that once were possible only on<br/>stationary computers on-the-go anywhere and at any time. This shift<br/>has also affected the way we learn. The use of mobile devices on-the-go<br/>requires users to multitask and divide attention between...
conference paper 2018
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Robal, T. (author), Zhao, Y. (author), Lofi, C. (author), Hauff, C. (author)
Massive Open Online Courses (MOOCs) have become an attractive opportunity for people around the world to gain knowledge and skills. Despite the initial enthusiasm of the first wave of MOOCs and the subsequent research efforts, MOOCs today suffer from retention issues: many MOOC learners start but do not finish. A main culprit is the lack of...
conference paper 2018
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Taal, A. (author), Itard, L.C.M. (author), Zeiler, W. (author), Zhao, Y (author)
A much occurring problem in the Energy Management Systems of existing buildings and HVAC services is that the measurements are unreliable. In this article a methodology is described which can be used to determine the presence of errors in energy monitoring, caused by faulty measurements. These errors can be detected and subsequently diagnosed....
conference paper 2016
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Zhao, Y. (author)
doctoral thesis 2013
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Lv, L.P. (author), Zhao, Y. (author), Vimalanandan, A. (author), Rohwerder, M. (author), Landfester, K. (author), Crespy, D. (author)
Abstract only.
conference paper 2013
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Vimalanandan, A. (author), Lv, L.P. (author), Zhao, Y. (author), Crespy, D. (author), Landfester, K. (author), Rohwerder, M. (author)
Abstract only.
conference paper 2013
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Yao, W. (author), Chen, X. (author), Zhao, Y. (author), Van Tooren, M.J.L. (author)
To comprehensively assess fractionated spacecraft, an assessment tool is developed based on lifecycle simulation under uncertainty driven by modular evolutionary stochastic models. First, fractionated spacecraft nomenclature and architecture are clarified, and assessment criteria are analyzed. The mean and standard deviation of risk adjusted...
journal article 2012
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Lu, Y. (author), Zhao, Y. (author), Kuipers, F.A. (author), Van Mieghem, P. (author)
More and more free multi-party video conferencing applications are readily available over the Internet and both Server-to-Client (S/C) or Peer-to-Peer (P2P) technologies are used. Investigating their mechanisms, analyzing their system performance, and measuring their quality are important objectives for researchers, developers and end users. In...
conference paper 2010
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Zhao, Y. (author)
doctoral thesis 2009
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Zhao, Y. (author), Dong, Y. (author), Gerrits, J.F.M. (author), Van Veenendaal, G. (author), Ling, J.R. (author), Farserotu, J.R. (author)
A 9 mW FM-UWB receiver front-end for low data rate (<50 kbps), short range (<10 m) applications operating in the ultra-wideband (UWB) band centered at 7.45 GHz is described in this paper. A single-ended-to-differential preamplifier with 30 dB voltage gain, a 1 GHz bandwidth FM demodulator, and a combined (preamp/demodulator) receiver front-end...
journal article 2009
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Zhao, Y. (author)
master thesis 2000
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Quan, N.T. (author), Sarkar, S. (author), Ma, Y. (author), Zhao, Y. (author), Liu, Z. (author), Lu, Z. (author)
report 2000
Searched for: author:"Zhao, Y."
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