Browsing by Author "Huang, Fei"

Now showing 1 - 4 of 4

Efficient and robust charge-transporting polymers for highly efficient polymer light-emitting diodes
(2009-03-22)
Huang, Fei
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Cheng, Yen-Ju
;
Liu, Michelle S.
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Shih, Ping-I
;
Shu, Chingfong
Highly Efficient Polymer White-Light-Emitting Diodes Based on Lithium Salts Doped Electron Transporting Layer
(2009-01-19)
Huang, Fei
;
Shih, Ping-I
;
Shu, Ching-Fong
;
Chi, Yun
;
Jen, Alex K. -Y.
A Li(2)CO(3)-doped water/alcohol-soluble neutral conjugated polymer is used as the electron-injection layer in a solution-processed polymer OWLED with very high efficiency. A maximum forward viewing luminous efficiency of 36.1 cd A(-1) and a power efficiency of 23.4 lm W(-1) were achieved, values comparable to those reported I-or the state-of-the-art vacuum deposited small-molecule OWLEDs.
Integrated airline productivity performance evaluation with CO2 emissions and flight delays
(2020-05-01)
Huang, Fei
;
Zhou, Dequn
;
Hu, Jin-Li
;
Wang, Qunwei
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經營管理研究所
This paper evaluates the airline productivity change by applying a modified global Malmquist productivity index (GMPI) model, incorporating both CO2 emissions and flight delays. Statistical inference is also performed on the GMPI results using the bootstrapping method. Empirical research was conducted on 15 international airlines during 2011-2017. The obtained results showed that the productivity of all airlines had been fluctuating and experienced a slight increase over 2011-2017. Most of these 15 airlines made more progress in managing punctuality than CO2 emissions. High punctuality policy may not be the best choice for all airlines when considering financial constraints, while airlines in more liberalized aviation markets are more likely to improve productivity by reducing flight delays. Efficiency change and technological change were the major driving factors for the growth of airline productivity. European and US airlines benefitted more from superior technology, while most Asian and Oceanian airlines still benefitted from the advantage of efficiency. Based on the findings, specific management advice was given.
Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes
(2008-12-15)
Huang, Fei
;
Shih, Ping-I
;
Liu, Michelle S.
;
Shu, Ching-Fong
;
Jen, Alex K. -Y.
Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4(')-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li(2)CO(3) salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C(2)] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m(2) at the current density of 7.9 mA/cm(2) and drive voltage of 8.0 V.