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Alex K.-Y. Jen
Researcher at City University of Hong Kong
Publications - 973
Citations - 72195
Alex K.-Y. Jen is an academic researcher from City University of Hong Kong. The author has contributed to research in topics: Perovskite (structure) & Polymer. The author has an hindex of 128, co-authored 921 publications receiving 61811 citations. Previous affiliations of Alex K.-Y. Jen include University of Nebraska–Lincoln & Zhejiang California International NanoSystems Institute.
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Journal ArticleDOI
Large Grained Perovskite Solar Cells Derived from Single-Crystal Perovskite Powders with Enhanced Ambient Stability.
TL;DR: The resultant large grained perovskite thin film possesses a negligible physical gap between each large grain and is highly crystalline as evidenced by its fan-shaped birefringence observed under polarized light, which is very different from the thin film prepared from the typical precursor route (MAI + PbI2).
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Highly efficient red electrophosphorescent devices based on an iridium complex with trifluoromethyl-substituted pyrimidine ligand
Yu-Hua Niu,Baoquan Chen,Sen Liu,Hin-Lap Yip,Julie A. Bardecker,Alex K.-Y. Jen,Jakka Kavitha,Yun Chi,Ching-Fong Shu,Ya-Hsien Tseng,Chen-Han Chien +10 more
TL;DR: In this paper, a red-emitting electrophosphorescent device was fabricated by doping an iridium (Ir) complex containing trifluoromethyl (CF3)-substituted pyrimidine ligand into a conjugated bipolar polyfluorene with triphenylamine and oxadiazole as side chains.
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Steric Effects of the Initiator Substituent Position on the Externally Initiated Polymerization of 2-Bromo-5-iodo-3-hexylthiophene
Natalia Doubina,Sergio A. Paniagua,Alexandra V. Soldatova,Alex K.-Y. Jen,Seth R. Marder,Christine K. Luscombe +5 more
TL;DR: In this article, an externally initiated polymerization of 2-bromo-3-hexyl-5-iodothiophene was attempted from four aryl and thiophene based small molecule initiators functionalized with a phosphonate moiety.
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High‐Performance Inverted Polymer Solar Cells: Device Characterization, Optical Modeling, and Hole‐Transporting Modifications
Jingyu Zou,Hin-Lap Yip,Yong Zhang,Yan Gao,Yan Gao,Chien Shang-Chieh,Kevin M. O'Malley,Chu-Chen Chueh,Hongzheng Chen,Hongzheng Chen,Alex K.-Y. Jen +10 more
TL;DR: In this article, a detailed study of solution-processed, inverted-structure PSCs based on the blends of a low bandgap polymer, poly(indacenodithiophene-co-phananthrene-quinoxaline) (PIDT-PhanQ) and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as the bulk heterojunction (BHJ) layer is carried out.
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Silicon-Organic Hybrid (SOH) Mach-Zehnder Modulators for 100 Gbit/s on-off Keying
Stefan Wolf,Heiner Zwickel,W. Hartmann,W. Hartmann,Matthias Lauermann,Yasar Kutuvantavida,Clemens Kieninger,Lars Altenhain,Rolf Schmid,Jingdong Luo,Alex K.-Y. Jen,Sebastian Randel,Wolfgang Freude,Christian Koos +13 more
TL;DR: This work demonstrates the first demonstration of 100 Gbit/s OOK on the silicon photonic platform, featuring the lowest drive voltage and energy consumption ever demonstrated for a semiconductor-based device at this data rate and expects that high-speed, power-efficient SOH modulators may have transformative impact on short-reach networks.