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AC Back Surface Recombination Velocity in n<sup>+</sup>-p-p<sup>+</sup>Silicon Solar Cell under Monochromatic Light and Temperature

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Journal of Electromagnetic Analysis and Applications 2021年第5期13卷 67-81页

作者： Mame Faty Mbaye Fall Idrissa Gaye dianguina Diarisso Gora Diop Khady Loum Nafy Diop Khalidou Mamadou Sy Mor Ndiaye Gregoire Sissoko Ecole Polytechnique de Thiès Thiès Sénégal Institute of Technology University of Thiès Thiès Sénégal Laboratory of Semiconductors and Solar Energy Physics Department Faculty of Science and Technology University Cheikh Anta Diop Dakar Senegal

Excess minority carrier’s diffusion equation in the base of monofaciale silicon solar cell under frequency modulation of monochromatic illumination is resolved. Using conditions at the base limits involving recombination velocities Sf and Sb, respectively at the junction (n+/p) and back surface (p+/p), the AC expression of the excess minority carriers’ density δ (T, ω) is determined. The AC density of photocurrent Jph (T, ω) is represented versus recombination velocity at the junction for different values of the temperature. The expression of the AC back surface recombination velocity Sb of minority carriers is deduced depending on the frequency of modulation, temperature, the electronic parameters (D (ω)) and the thickness of the base. Bode and Nyquist diagrams are used to analyze it.

关键词： Silicon Solar Cell AC Back Surface Recombination Velocity Temperature Bode and Nyquist Diagrams

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Identifying Risk Factors for Pulmonary Tuberculosis Diagnosis Delays in Mali a West-African Endemic Country

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Journal of Tuberculosis Research 2022年第1期10卷 45-59页

作者： dianguina soumare Bocar Baya Khadidia Ouattara Tenin Kanoute Cheick M. Sy Seydou Karembé Ibrahima Guindo Lamine Coulibaly Youssouf Kamian Aime P. Dakouo Fatoumata Sidibe Salif Koné Drissa Kone Oumar Yossi Gaoussou Berthe Yacouba Toloba Service of Pneumology of the University Teaching Hospital of Point-G Bamako Mali University Clinical Research Center (UCRC) University of Sciences Techniques and Technologies of Bamako (USTTB) Bamako Mali Non-Government Organization: Sante-Sud Bamako Mali.

Background: Tuberculosis was the deadliest infectious agent before covid-19;1.5 million deaths in 2020. Despite, a variety, of easy and cheap diagnostic tools, detection rates still fall below 90%;diagnosis delays are long exceeding 30 days in many continents. This study aimed to determine risk factors for pulmonary TB diagnosis delays in Mali. Methods: A cross-sectional study was conducted in Bamako to include pulmonary TB patients at treatment initiation centers. Verbal consent was obtained before the interview. Demographics, clinical, treatment cost, and patient, medical, and diagnostic delays were computed using SPSS 25.0 considering a significance level p Results: In total 266 patients were included, 80.8% were male, mean age was 40.5 ± 12 years, primary education level was 50.4%, treatment cost before diagnosis was 100 - 200 thousand CFA in 65.4%, smokers were 42.1%, median patient, medical and total diagnostic delays were 58, 57 and 114 days respectively. Education level below university, social reasons, and non-request of health workers were identified as independent risk factors for diagnostic delay > 100 days in Mali. Conclusion: Diagnostic delay is relatively very long in Mali, there is an urgent need for identification and action to shorten the delays to limit the transmission chain and avoid disabling pulmonary sequels.

关键词： Tuberculosis Diagnosis Delays Risk-Factors Mali

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Back Illuminated N/P/P+ Bifacial Silicon Solar Cell under Modulated Short-Wavelength: Determination of Base Optimum Thickness

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Energy and Power Engineering（能源与动力工程） 2021年第5期

作者： Mamadou Sall dianguina Diarisso Mame Faty Mbaye Fall Gora Diop Mor Ndiaye Khady Loum Gregoire Sissoko

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