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.
Papers
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Improved ITO thin films with a thin ZnO buffer layer by sputtering
TL;DR: In this paper, a buffering method of improving the quality of ITO thin films on glass by r.f. magnetron sputtering was reported, which showed that the ITO films with buffering had a remarkable 50% decrease of resistivity compared to those without buffering.
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Variable liquid crystal pretilt angles generated by photoalignment of a mixed polyimide alignment layer
TL;DR: In this paper, a method to generate any liquid crystal pretilt angle is proposed and demonstrated based on deep ultraviolet photoalignment of a layer consisting of nanostructured domains of horizontal and vertical alignment polyimides.
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Stereoselective synthesis, efficient light emission, and high bipolar charge mobility of chiasmatic luminogens
Zujin Zhao,Jacky Wing Yip Lam,Carrie Yin Kwan Chan,Shuming Chen,Jianzhao Liu,Ping Lu,Mario Rodríguez,José-Luis Maldonado,Gabriel Ramos-Ortiz,Herman H. Y. Sung,Ian D. Williams,Huimin Su,Kam Sing Wong,Yuguang Ma,Hoi Sing Kwok,Huayu Qiu,Ben Zhong Tang +16 more
TL;DR: Stereoregular tetraphenylethene derivatives (Z)-o-BCaPTPE and (Z-o-BTPATPE featured with chiasmatic conformations and aggregation-enhanced emission characteristics are synthesized using a McMurry reaction as both the light-emitting and electron-transporting layers show high efficiencies.
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Using tetraphenylethene and carbazole to create efficient luminophores with aggregation-induced emission, high thermal stability, and good hole-transporting property
Zujin Zhao,Carrie Yin Kwan Chan,Shuming Chen,Chunmei Deng,Jacky Wing Yip Lam,Cathy Ka Wai Jim,Yuning Hong,Ping Lu,Zhengfeng Chang,Xiaopeng Chen,Hoi Sing Kwok,Huayu Qiu,Ben Zhong Tang +12 more
TL;DR: In this paper, a group of multilayer electroluminescence devices with configurations of ITO/NPB/emitter/TPBi/Alq3/LiF/Al are constructed, which exhibit sky blue light in high luminance and high current and external quantum efficiencies.
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Aggregation-induced emission, mechanochromism and blue electroluminescence of carbazole and triphenylamine-substituted ethenes
Carrie Yin Kwan Chan,Jacky Wing Yip Lam,Zujin Zhao,Shuming Chen,Ping Lu,Herman H. Y. Sung,Hoi Sing Kwok,Yuguang Ma,Ian D. Williams,Ben Zhong Tang +9 more
TL;DR: In this article, a number of multilayer light-emitting diodes with device configurations of ITO/NPB/dye/TPBi/Alq3/LiF/Al, itO/NBP/Dye/TBi/LF/AQ3/Al and ITO-NPB/DY/TPB/AlQ3-AQ4/Al are fabricated, which emit sky blue light with maximum luminance, current efficiency, power efficiency and external quantum efficiency of 11.700 cd m−2,