Development of Deposition and Characterization Systems for Thin Film Solar Cells
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2016
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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo14812956906964072021-08-03T06:39:23Z Development of Deposition and Characterization Systems for Thin Film Solar Cells Cimaroli, Alexander J. Solid State Physics Zinc Phosphide Cadmium Telluride Thin Film Solar Cell Photovoltaic Close-space Sublimation Hysteresis Perovskite Maximum Power Point Tracking Photovoltaic (PV) devices are becoming more important due to a number of economic and environmental factors. PV research relies on the ability to quickly fabricate and characterize these devices. While there are a number of deposition methods that are available in a laboratory setting, they are not necessarily able to be scaled to provide high throughput in a commercial setting. A close-space sublimation (CSS) system was developed to provide a means of depositing thin films in a very controlled and scalable manner. Its viability was explored by using it to deposit the absorber layer in Zn3P2 and CdTe solar cell devices. Excellent control over morphology and growth conditions and a high level of repeatability was demonstrated in the study of textured Zn3P2 thin films. However, some limitations imposed by the structure of Zn3P2-based PV devices showed that CSS may not be the best approach for depositing Zn3P2 thin films. Despite the inability to make Zn3P2 solar cell devices, high efficiency CdTe solar cells were fabricated using CSS.With the introduction of Perovskite-based solar cell devices, the viability of data collected from conventional J-V measurements was questioned due to the J-V hysteresis that Perovskite devices exhibited. New methods of solar cell characterization were developed in order to accurately and quickly assess the performance of hysteretic PV devices. Both J-V measurements and steady-state efficiency measurements are prone to errors due to hysteresis and maximum power point drift. To resolve both of these issues, a maximum power point tracking (MPPT) system was developed with two algorithms: a simple algorithm and a predictive algorithm. The predictive algorithm showed increased resistance to the effects of hysteresis because of its ability to predict the steady-state current after a bias step with a double exponential decay model fit.Some publications have attempted to quantify the degree of J-V hysteresis present in fabricated Perovskite-based devices, but the analysis relied on J-V measurements. The sweep rate, starting bias, illumination time, etc. would affect the value of the calculated degree of hysteresis. A method of using transient photocurrent measurements is presented to accurately quantify the degree of hysteresis for all solar cells: not just Perovskite-based devices. According to this method, almost all solar cell devices exhibit several forms of J-V hysteresis. This method may open new ways ofanalyzing the defects in fabricated PV devices. 2016 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481295690696407 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481295690696407 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Solid State Physics Zinc Phosphide Cadmium Telluride Thin Film Solar Cell Photovoltaic Close-space Sublimation Hysteresis Perovskite Maximum Power Point Tracking |
| spellingShingle |
Solid State Physics Zinc Phosphide Cadmium Telluride Thin Film Solar Cell Photovoltaic Close-space Sublimation Hysteresis Perovskite Maximum Power Point Tracking Cimaroli, Alexander J. Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| author |
Cimaroli, Alexander J. |
| author_facet |
Cimaroli, Alexander J. |
| author_sort |
Cimaroli, Alexander J. |
| title |
Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| title_short |
Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| title_full |
Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| title_fullStr |
Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| title_full_unstemmed |
Development of Deposition and Characterization Systems for Thin Film Solar Cells |
| title_sort |
development of deposition and characterization systems for thin film solar cells |
| publisher |
University of Toledo / OhioLINK |
| publishDate |
2016 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481295690696407 |
| work_keys_str_mv |
AT cimarolialexanderj developmentofdepositionandcharacterizationsystemsforthinfilmsolarcells |
| _version_ |
1719441147523235840 |