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Your search keyword '"Tian, Wen-Tan"' showing total 4 results
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4 results on '"Tian, Wen-Tan"'

2. An organic semiconductor as an anode-buffer for the improvement of small molecular photovoltaic cells

Author

Ying Shi, Bao Xiu Mi, Lu Wang, Zhi Qiang Gao, Xin Li, Xin Yan Zhao, and Tian Wen Tan

Subjects
Fullerene, Materials science, business.industry, General Chemical Engineering, Doping, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Polymer solar cell, 0104 chemical sciences, Anode, Molybdenum trioxide, Organic semiconductor, chemistry.chemical_compound, chemistry, Optoelectronics, 0210 nano-technology, business, HOMO/LUMO, Ohmic contact
Abstract

A hole transport material, 1,3,4,5,6,7-hexaphenyl-2-{3′-(9-ethylcarbazolyl)}-isoindole (HPCzI), was used to serve as an efficient organic anode-buffer for organic photovoltaic cells (OPVs) with a bulk heterojunction structure comprising a copper phthalocyanine (CuPc) and fullerene (C60) mixture. Compared with a CuPc or molybdenum trioxide (MoO3) anode-buffer layer, the HPCzI based OPV device exhibits improved performance. Due to its highest occupied molecular orbital (HOMO) energy level being well matched with ITO and its relatively high hole conductivity, HPCzI can facilitate hole-extraction and reduce device resistance, leading to a significantly improved fill factor (FF) in the OPV device. Furthermore, when HPCzI was doped with MoO3, additional promotion of the device performance was achieved, which is supposedly attributed to the increase of the hole transport ability in an anode-buffer interface and better ohmic contact with ITO.

Published
2017

4. Immunological activities of polysaccharide extracted from Elaeagnus angustifolia L.

Author

Sun, Na-xin, Liu, Hui-ping, Liu, Xu-hui, Zhang, Yan, Liu, Xiao-qing, Wang, Shu, Xu, Xiang-xin, and Tian, Wen-tan

Subjects
POLYSACCHARIDES, RUSSIAN olive, GEL permeation chromatography
Abstract

The study was to investigate the immunological activities of polysaccharide isolated from Elaeagnus angustifolia L. The extracted Elaeagnus angustifolia L. polysaccharide (EAP) was purified by DEAE cellulose-52 chromatography (DEAE-52) and Sephadex G-100 size-exclusion chromatography (G-100). Then the average molecular weight (Mw) of purified polysaccharide was determined by high-performance gel permeation chromatography (HPGPC). One main fraction (EAP-1a) was obtained through the isolation and purification steps. The results showed that EAP-1a had strong immunological activities. EAP-1a could significantly increase spleen and thymus index, enhance the NK cell activity, stimulate the phagocytosis of peritoneal phagocyte and increase the level of IL-2, IFN-γ and IgG in serum. Thus, EAP-1a isolated from Elaeagnus angustifolia L. could enhance the immunological activities of immunosuppressed mice induced by cyclophosphamide (CY). [ABSTRACT FROM AUTHOR]

Published
2018
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