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12 results on '"Li, Shaman"'

1. Analysis on the status quo and influencing factors of nursing staff's perceived stress in the post-epidemic era (后疫情时代护理人员知觉压力现状及影响因素分析)

Author

ZHOU Liangting (周良婷), HU Shunan (胡舒楠), LI Shaman (李沙蔓), and ZHANG Yan (张艳)

Subjects
post-epidemic era, nursing staff, fatigue, perceived superior support, 后疫情时代, 护理人员, 疲劳, 感知的上级支持, Nursing, RT1-120
Abstract

Objective To investigate the present situation of nursing staff’s perceived stress and its influencing factors in the post-epidemic era. Methods The convenience sampling method was used to select 1083 on-duty nursing staff from grade 3A general hospitals. General data questionnaire, fatigue scale-14 (FS-14), Chinese Perceived Stress Scale (CPSS) and perceived superior social support scale were used to conduct a questionnaire survey. Results 65. 93%(714/1083) of nursing staff were under health risk stress. Fatigue, perceived superior support, first degree, hospital employment pattern and annual family income were the influencing factors of perceived stress (P

Published
2023
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2. High‐Efficiency Near‐Infrared Iridium(III) Complexes with Tailored Ligands for Solution‐Processed OLEDs with Maximum EQE of 3.75% at 830 nm.

Author

Li, Shaman, Zhang, Yanxin, Dai, Yu, Xu, Jingyi, Meng, Qing‐yu, Wen, Xue‐liang, and Qiao, Juan

Subjects
*QUANTUM efficiency, *ORGANIC bases, *BAND gaps, *ORGANIC light emitting diodes, *IRIDIUM
Abstract

The development of highly efficient pure near‐infrared (NIR) emitting organic materials with emission beyond 800 nm is extremely challenging due to the limitation of the energy gap law. Herein, three efficient NIR emitting iridium(III) complexes are developed adopting pyrido[3,4‐b]pyrazine derivatives as the cyclometalated C^N ligands, namely (Epptt)2Iracac (1), (pptt)2Iracac (2), and (ppCz)2Irtmd (3). Due to the enhanced donor–acceptor interaction inside the ligand, the conjugation‐extended and electron‐richer N‐phenylcarbazole unit at the C‐part of the ligands endows complex 3 with a large bathochromic shift of emission peak from 796 to 862 nm in toluene solution, compared with thieno[3,2‐b]thiophene C‐part in complex 2. The solution‐processed OLEDs based on complex 3 achieved a record high maximum external quantum efficiency of 3.75% and low efficiency roll‐off with the emission peak at 830 nm, a champion efficiency in the Ir(III) based OLEDs with emission peak exceeding 800 nm. This work opens a new avenue for the development of high‐efficiency pure NIR organic emitters based on Ir(III) complexes for various applications. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Enhanced Photovoltaic Performance of 9,10-Difluorodithieno[3,2-a:2′,3′-c]phenazine-Based Polymer Donors by the Synergistic Effect of Alkyl-Thiophene π-Bridges and Halogen Atom Modification

Author

Yang, Dengchen, primary, Li, Shaman, additional, Guo, Jing, additional, Zhuo, Hongmei, additional, Zhou, Liuyang, additional, Lai, Wenbin, additional, Zhang, Zhanjun, additional, Li, Xiaojun, additional, Meng, Lei, additional, and Li, Yongfang, additional

Published
2023
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