Hong Kong Baptist University

About: Hong Kong Baptist University is a education organization based out in Hong Kong, China. It is known for research contribution in the topics: China & Population. The organization has 7811 authors who have published 18919 publications receiving 555274 citations. The organization is also known as: Hong Kong Baptist College & HKBU.

Significant Improvement of Dye-Sensitized Solar Cell Performance Using Simple Phenothiazine-Based Dyes

Abstract: A series of simple phenothiazine-based dyes have been synthesized, in which a cyanoacrylate acceptor directly attached to the C(3) position of phenothiazine, and an additional linear electron-rich (4-hexyloxy)phenyl group at C(7) on the opposite side of the acceptor, and an alkyl chain with different length at N(10) of the phenothiazine periphery are presented. The dye molecules have a linear shape which is favorable for the formation of a compact dye layer on the TiO2 surface, while their butterfly conformations can sufficiently inhibit molecular aggregation. Moreover, the structural features of (4-hexyloxy)phenyl donor moiety at the C(7) position of phenothiazine extends the π-conjugation of the chromophore, thus enhancing the performance of dye-sensitized solar cells (DSSCs). Moreover, the alkyl substituents with different chain length at the N(10) atom of phenothiazine could further optimize the performance through completely shielding the surface of TiO2 from the I–/I3- electrolyte and subsequently r...

Remanagement of Singlet and Triplet Excitons in Single-Emissive-Layer Hybrid White Organic Light-Emitting Devices Using Thermally Activated Delayed Fluorescent Blue Exciplex.

Abstract: A high-performance hybrid white organic light-emitting device (WOLED) is demonstrated based on an efficient novel thermally activated delayed fluorescence (TADF) blue exciplex system. This device shows a low turn-on voltage of 2.5 V and maximum forward-viewing external quantum efficiency of 25.5%, which opens a new avenue for achieving high-performance hybrid WOLEDs with simple structures.

Toward culture‐sensitive theories of the work–family interface

Abstract: Due to societal trends, managing the work–family interface has become an increasingly challenging task for employees in virtually every nation. However, prior studies of this interface have mostly tested U.S.-based theories using U.S. samples. The construct of societal or national culture, which seems likely to shape individuals' experiences of the work–family interface, has been generally unacknowledged in theories and research in the work–family literature. In this paper, we offer guidelines for the development of culture-sensitive theories of work–family phenomena and for research to test such theories as they are developed. First, we review the few prior research attempts that have incorporated cultural considerations in some manner and identify cultural dimensions that are likely to influence the work–family interface. Second, we demonstrate how selected cultural dimensions may be incorporated into theories of work–family conflict and enrichment, two constructs that represent the negative and positive side of the work–family interface respectively, to make these theories more culture-sensitive. Finally, we offer an ambitious agenda for future theory and research to increase understanding of cultural influences on the work–family interface. Copyright © 2009 John Wiley & Sons, Ltd.

Array-enhanced coherence resonance: nontrivial effects of heterogeneity and spatial independence of noise.

Abstract: We demonstrate the effect of coherence resonance in a heterogeneous array of coupled Fitz Hugh--Nagumo neurons. It is shown that coupling of such elements leads to a significantly stronger coherence compared to that of a single element. We report nontrivial effects of parameter heterogeneity and spatial independence of noise on array-enhanced coherence resonance; especially, we find that (i) the coherence increases as spatial correlation of the noise decreases, and (ii) inhomogeneity in the parameters of the array enhances the coherence. Our results have the implication that generic heterogeneity and background noise can play a constructive role to enhance the time precision of firing in neural systems.

Market Consequences of Earnings Management in Response to Security Regulations in China

Abstract: Under the 1996-98 security regulations in China, the accounting rate of return on equity (ROE) has to be greater than 10 percent for three "consecutive" years for a firm to qualify for stock rights offers. Despite declining economic conditions during this period, the percentage of firms reporting ROE between 10 and 11 percent is about "three" times that for 1994-95. This unique regulatory environment provides a natural experimental setting for the empirical assessment of earnings-management behavior and its consequences. This study examines whether listed Chinese firms manage earnings to meet regulatory benchmarks and whether regulators and investors consider the quality of earnings in their respective regulatory and investment decisions. On the basis of a sample of listed Chinese firms from 1996 to 1998, we observe that managers execute transactions involving below-the-line items and use income-increasing accounting accruals to meet regulatory ROE targets for stock rights offerings. The firms that apply for, but fail to receive, regulatory approval manage earnings more significantly than do firms that receive approval and pair-matched control firms. Our market study also suggests that investors differentiate the quality of earnings and put less value on earnings suspected of a greater degree of management. Overall, our results imply that the regulatory bodies and investors to some extent make rational adjustments for the quality of earnings.