H
Hoi Sing Kwok
Researcher at Hong Kong University of Science and Technology
Publications - 1207
Citations - 32982
Hoi Sing Kwok is an academic researcher from Hong Kong University of Science and Technology. The author has contributed to research in topics: Liquid crystal & Thin-film transistor. The author has an hindex of 77, co-authored 1165 publications receiving 29448 citations. Previous affiliations of Hoi Sing Kwok include University of Hong Kong & University of California, Berkeley.
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Dynamic Flow and Switching Bistability in Twisted Nematic Liquid Crystal Cells
TL;DR: In this article, the switching bistability of twisted nematic liquid crystal cells is investigated based on the interaction between dynamic flow and director rotation, and it is shown that there exists a general type of bistable twisted director configuration.
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Optical properties of copper phthalocyanine
Aleksandra B. Djurišić,C. Y. Kwong,Tszwai Lau,Weiling Guo,Eric Herbert M. Li,Zhengtong Liu,Hoi Sing Kwok,Lillian Sze Man Lam,Wai Kin Chan +8 more
TL;DR: In this paper, the optical functions of copper phthalocyanine (CuPc) have been determined using spectroscopic ellipsometry in the spectral range from 1.55 to 4.1 eV.
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Tunable lens by spatially varying liquid crystal pretilt angles
TL;DR: In this article, a method of obtaining controllable spatially varying liquid crystal pretilt angles using a stacked alignment layer is presented, which consists of nano-domains of horizontal and vertical alignment materials.
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High-performance polycrystalline SiGe thin-film transistors using Al 2 O 3 gate insulators
TL;DR: In this paper, the use of aluminum oxide as the gate insulator for low temperature (600/spl deg/C) polycrystalline SiGe thin-film transistors (TFTs) was studied.
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2,5-difluorenyl-substituted siloles for the fabrication of high-performance yellow organic light-emitting diodes.
Bin Chen,Yibin Jiang,Long Chen,Han Nie,Bairong He,Ping Lu,Herman H. Y. Sung,Ian D. Williams,Hoi Sing Kwok,Anjun Qin,Zujin Zhao,Zujin Zhao,Ben Zhong Tang,Ben Zhong Tang +13 more
TL;DR: Emissions of the present siloles gradually improved and they showed higher fluorescence quantum yields than 2,3,4,5-tetraphenylsiloles, which are highly emissive in solid films, with dominant green to yellow emissions and good solid-state Φ(F) values.