TY - CHAP A1 - Hinken, D. A1 - Milsted, A. A1 - Bock, R. A1 - Fischer, B. A1 - Bothe, K. A1 - Schütze, M. A1 - Isenberg, J. A1 - Schulze, Achim A1 - Wagner, M. T1 - Determination of the Base-Dopant Concentration of Large-Aria Crystalline Solar Cells T2 - IEEE Trans. Electronic Devices KW - Photovoltaik KW - Crystalline Silicon Solar Cells Y1 - 2010 PB - IEEE Electronic Devices Society CY - USA, North Carolina ER - TY - JOUR A1 - Ackermann, N A1 - Gutewort, V. A1 - Quinque, M. A1 - Kühne, M. A1 - Stein v. Kamienski, E. A1 - Schulze, Achim A1 - Wichtendahl, R. T1 - Final testing: a secure release gate towards module manufacturing JF - Photovoltaics International KW - Photovoltaik KW - Module manufacturing Y1 - 2010 IS - 8 ER - TY - JOUR A1 - Schulze, Achim T1 - Existence and stability of static shells to the Vlasov-Poisson System with a fixed central point mass JF - Mathematical Proceedings of the Cambridge Philosophical Society KW - Photovoltaik KW - Static shells KW - Vlasov-Poisson system Y1 - 2018 IS - 146 ER - TY - JOUR A1 - Schulze, Achim T1 - Existence of axially symmetric solution to the Vlasov-Poisson System depending on Jacobi's Integral JF - Mathematical Proceedings of the Cambridge Philosophical Society KW - Photovoltaik KW - Axielly symmetric solution KW - Vlasov-Poisson system Y1 - 2018 IS - 6/2009 ER - TY - JOUR A1 - Schulze, Achim T1 - Existence and stability of static shells to the Vlasov-Poisson system JF - Analysis KW - Static shells KW - Photovoltaik KW - Vlasov-Poisson system Y1 - 2018 IS - 26 ER - TY - CHAP A1 - Gottschalk, L. A1 - Pflaum, D. A1 - Schneider, S. A1 - Schulze, Achim A1 - Becker, F. A1 - Queck, M. A1 - Hüttl, B. T1 - Evaluation of a compehensive IV- Outdoor Characterization Method for Photovoltaik Modules T2 - Proceedings of the 33rd EU-PVSEC KW - Photovoltaik KW - IV-Outdoor Characterization Y1 - 2017 ER - TY - CHAP A1 - Taubitz, C. A1 - Schulze, Achim A1 - Köntopp, M.B. T1 - Potential-Induced Degradation: An improved unterstanding of mechanicm and infuence factors T2 - Proceedings of the 32nd EU-PVSEC KW - Potental-Induced Degradation KW - Mechanism KW - Influence factors Y1 - 2016 ER - TY - CHAP A1 - Wachter, M. A1 - Gottschalk, L. A1 - Simmler, M. A1 - Schulze, Achim A1 - Becker, F. A1 - Sayala, M. A1 - Hüttl, B. T1 - Short-cicuit current measurement at clear-sky conditions on photovoltaik modules T2 - Proceedings of the 32nd EU-PVSEC KW - Photovoltaik KW - Short circuit current measurement Y1 - 2016 ER - TY - CHAP A1 - Kaiser, D. A1 - Simmler, M. A1 - Wachter, M. A1 - Becker, F. A1 - Sayala, M. A1 - Kaden, T. A1 - Schulze, Achim A1 - Hüttl, B. T1 - Concept for fast and precise PV Module Outdoor Characterization T2 - Proceedings of the 31st EU-PVSEC KW - Photovoltaik Y1 - 2015 ER - TY - CHAP A1 - Schulze, Achim A1 - Hüttl, B. A1 - Neubert, S. A1 - Hund, B. A1 - Luschitz, J. A1 - Patzlaff, T. T1 - 2D Analysis of thin-film modules T2 - Proceedings of the 25th EU-PVSEC KW - Photovoltaik KW - thin-film modules Y1 - 2010 ER - TY - JOUR A1 - Schulze, Achim A1 - Koentopp, M. B. A1 - Taubitz, C. T1 - A drift and diffusion model for PID-s in solar modules JF - IEEE Journal of Photovoltaics N2 - A quantitative physical model for potential induced degradation of the shunting type (PID-s) in solar modules is introduced. Based on a drift and diffusion approach for sodium ions and atoms, it gives insight into the kinetics of degradation and the corresponding regeneration. A simple drift/source term is used to describe the time-dependent flux of Na-ions towards stacking faults at the surface of the solar cell. The assumed transport mechanism for Na+ ions through the SiN-layer uses the modified Stern-Eyring rate theory but our approach can also be adapted to other mechanisms. Several PID-s and regeneration curves of one-cell solar modules at T = 49°C and T = 90°C with 1000V potential difference between modul frame and cell were measured and least-square fits of the in-situ measured parallel resistance Rsh to the model were performed giving very good accordance. Based on a few measurements, the model can predict PID-s and regeneration characteristics of solar modules under different conditions. KW - Photovoltaic cells, Photovoltaic systems, PID Y1 - 2020 UR - https://doi.org/10.1109/JPHOTOV.2020.3003776 VL - 2020 PB - IEEE CY - USA ER - TY - CHAP A1 - Schneider, S. A1 - Hüttl, B. A1 - Pflaum, D. A1 - Schnell, V. A1 - Schulze, Achim T1 - Freifeldcharakterisierung von PV-Anlagen im Rahmen des Projektes PV- FeldLab -ein Statusbericht- T2 - 3. Regenerative Energietechnik Konferenz in Nordhausen N2 - Das Projekt PV-FeldLab verfolgt das Ziel, ein umfassendes Konzept für eine messtechnisch sehr präzise elektrische Freifeld-Charakterisierung von PV-Generatoren zu entwickeln. Es beinhaltet eine optische Untersuchung mittels drohnengestützter Thermografie und eine genaue elektrische Charakterisierung von PV-Anlagen im Freifeld, auch bei räumlicher Inhomogenität von Bestrahlungsstärke, Temperatur und bei variablen Aufbauwinkeln von Modulen im Strang. Die Verknüpfung der elektrischen und optischen Messdaten erlaubt eine effiziente Untersuchung von PV-Anlagen und ermöglicht eine Präzisierung von Ertragsanalysen. Dieser Bericht beschreibt den ersten Projektabschnitt, in welchem der Fokus vor allem auf der Initialisierung der messtechnischen Komponenten, sowie ersten Messungen und Analysen liegt. KW - Photovoltaik, Messtechnik, Charakterisierung von Solarmodulen Y1 - 2020 PB - RET.con 2020 CY - Nordhausen ER - TY - JOUR A1 - Hüttl, Bernd A1 - Gottschalk, L. A1 - Schneider, S. A1 - Pflaum, D. A1 - Schulze, Achim T1 - Accurate Performance Rating of Photovoltaic Modules under Outdoor Test Conditions JF - Solar Energy N2 - Outdoor performance analyses of photovoltaic modules can be advantageous compared to indoor investigations, as they take into account the influences of natural test conditions on the modules. However, such outdoor performance assessments usually suffer from poor accuracies due to undefined test conditions for the modules. This paper reports on a comprehensive concept for improved outdoor analysis which results in performance data with indoor laboratory precision. The approach delivers current-voltage characteristics for even more test conditions than required by the standard IEC 61853-1. Hence, curves of modules’ electrical parameters above irradiance can be deduced for any temperatures. The concept allows precise determination of temperature coefficients for user-defined irradiances taking into account outdoor effects like light-soaking or light-induced degradation. The calibration and measurement uncertainty of the presented outdoor analysis method is evaluated quantitatively. For the measurements an advanced outdoor set-up was used. KW - Photovoltaic systems, Metrology Y1 - 2019 UR - https://doi.org/10.1016/j.solener.2018.12.002 VL - 2019 IS - 177 SP - 737 EP - 745 ER -