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| 1 | A Cost-Effective D-A-D Type Hole-Transport Material Enabling 20% Efficiency Inverted Perovskite Solar Celis显示文摘High-performance,cost-effective hole-transport materials(HTMs)are greatly desired for the commercialization of perovskite solar cells(PVSCs).Herein,two new HTMs,TPA-FO and TPA-PDO,are devised and synthesized,which have a donor-acceptor-donor(D-A-D)type molecule design featuring carbonyl group-functionalized arenes as the acceptor(A)units.The carbonyl group at the central core of HTMs can not only tune frontier molecular orbital(FMO)energy levels and surface wettability,but also can enable efficient surface passivation effects,resulting in reduced recombination loss.When employed as HTMs in inverted PVSCs without using dopant,TPA-FO with one carbonyl group yields a high power conversion efficiency(PCE)of 20.24%,which is among the highest values reported in the inverted PVSCs with dopant-free HTMs.More importantly,the facile one-step synthetic process enables a low cost of 30 USD g^(-1) for TPA-FO,much cheaper than the most studied HTMs used for high-efficiency dopant-free PVSCs.These results demonstrate the potential of D-A-D type molecules with carbonyl group-functionalized arene core in developing the low-cost dopant-free HTMs toward highly efficient PVSCs. | Jiachen Huang Jie Yang Huiliang Sun Kui Feng Qiaogan Liao Bolin Li He Yan Xugang Guo | 2021 | Chinese Journal of Chemistry2021，39，6： | 2 |
| 2 | Sentiment Analysis of Japanese Tourism Online Reviews显示文摘Purpose: Online reviews on tourism attractions provide important references for potential tourists to choose tourism spots. The main goal of this study is conducting sentiment analysis to facilitate users comprehending the large scale of the reviews, based on the comments about Chinese attractions from Japanese tourism website 4 Travel.Design/methodology/approach: Different statistics-and rule-based methods are used to analyze the sentiment of the reviews. Three groups of novel statistics-based methods combining feature selection functions and the traditional term frequency-inverse document frequency(TF-IDF) method are proposed. We also make seven groups of different rulesbased methods. The macro-average and micro-average values for the best classification results of the methods are calculated respectively and the performance of the methods are shown.Findings: We compare the statistics-based and rule-based methods separately and compare the overall performance of the two method. According to the results, it is concluded that the combination of feature selection functions and weightings can strongly improve the overall performance. The emotional vocabulary in the field of tourism(EVT), kaomojis, negative and transitional words can notably improve the performance in all of three categories. The rule-based methods outperform the statistics-based ones with a narrow advantage.Research limitation: Two limitations can be addressed: 1) the empirical studies to verify the validity of the proposed methods are only conducted on Japanese languages; and 2) the deep learning technology is not been incorporated in the methods.Practical implications: The results help to elucidate the intrinsic characteristics of the Japanese language and the influence on sentiment analysis. These findings also provide practical usage guidelines within the field of sentiment analysis of Japanese online tourism reviews.Originality/value: Our research is of practicability. Currently, there are no studies that focus on the sentiment analysis of Japanese reviews about Chinese attractions. | Chuanming Yu Xingyu Zhu Bolin Feng Lin Cai Lu An | 2019 | Journal of Data and Information Science2019，4，1： | 1 |
| 3 | Self-assembled donor-acceptor hole contacts for inverted perovskite solar cells with an efficiency approaching 22%: The impact of anchoring groups显示文摘Self-assembled molecules(SAMs) have shown great potential in replacing bulk charge selective contact layers in high-performance perovskite solar cells(PSCs) due to their low material consumption and simple processing. Herein, we design and synthesize a series of donor-acceptor(D-A) type SAMs(MPA-BTCA, MPA-BT-BA, and MPA-BT-RA, where MPA is 4-methoxy-N-(4-methoxyphenyl)-N-phenylaniline;BT is benzo[c][1,2,5]-thiadiazole;CA is 2-cyanoacrylic acid, BA is benzoic acid, RA is rhodanine-3-propionic acid) with distinct anchoring groups, which show dramatically different properties. MPA-BTCA with CA anchoring groups exhibited stronger dipole moments and formed a homogeneous monolayer on the indium tin oxide(ITO) surface by adopting an upstanding self-assembling mode. However, the MPA-BT-RA molecules tend to aggregate severely in solid state due to the sp~3 hybridization of the carbon atom on the RA group, which is not favorable for achieving a long-range ordered self-assembled layer.Consequently, benefiting from high dipole moment, as well as dense and uniform self-assembled film,the device based on MPA-BT-CA yielded a remarkable power conversion efficiency(PCE) of 21.81%.Encouragingly, an impressive PCE approaching 20% can still be obtained for the MPA-BT-CA-based PSCs as the device area is increased to 0.80 cm^(2). Our work sheds light on the design principles for developing hole selecting SAMs, which will pave a way for realizing highly efficient, flexible, and large-area PSCs. | Qiaogan Liao Yang Wang Zilong Zhang Kun Yang Yongqiang Shi Kui Feng Bolin Li Jiachen Huang Peng Gao Xugang Guo | 2022 | Journal of Energy Chemistry2022，31，5： | 0 |
| 4 | Effectiveness of Fuling(Poria) and its extracts against spleen deficiency in rats via tonifying spleen显示文摘OBJECTIVE:To observe and explore the effect of Fuling(Poria) in alleviating the spleen deficiency symptom pattern(SDSP).METHODS:We established an animal model of SDS in Sprague-Dawley(SD) rats by treating them with deficiency-inducing factors,including irregular feeding and tail clamping.Mice were administered Fuling(Poria) and its extracts(raw/cooked powder,aqueous/alcohol extract) by gavage once a day for 21 d.The body weight,rectal temperature,and spleen and thymus organ coefficients were calculated.The levels of motilin(MTL),gastrin(GAS),aquaporin 2(AQP2),interleukin 2(IL-2),IL-4,and 5-hydroxytryptamine(5-HT) in the serum and the level of AQP2 in the kidneys were evaluated by enzyme-linked immunosorbent assay.RESULTS:Fuling(Poria) and its extracts did not change the body weight,rectal temperature,and organ coefficients of the spleen and thymus.However,it reduced the levels of MTL and GAS and increased the levels of IL-2 and AQP2.In addition,the levels of IL-4 and 5-HT showed no significant alteration.CONCLUSIONS:These results suggested the crucial function of Fuling(Poria) in SDSP,especially promoting digestive function and water metabolism. | FENG Min JIA Ziming WAN Ming FAN Bolin TANG Xiaoqiao CHENG Wenhua SUN Fanzhong | 2023 | Journal of Traditional Chinese Medicine2023，43，3： | 0 |
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