Studies of sputtered CdTe and CdSe solar cells
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University of Toledo / OhioLINK
2012
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345260902 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo13452609022021-08-03T05:20:09Z Studies of sputtered CdTe and CdSe solar cells Kwon, Dohyoung Physics CdTe CdSe solar cell photovoltaic AFM scaling PL photoluminescence CdTe has recently become the most commercially successful polycrystalline thin filmsolar module material. Its low cost, large-area solar module is reshaping the silicondominatedsolar panel market; however, CdTe has much room to improve and thus morefundamental understanding is needed. Current thin film solar cell research is focused ontwo areas: One is identifying loss mechanisms and understanding the polycrystallinenature of single junction device to improve device performance. Another is searching fornew materials and fabricating tandem solar cells. In this study, along with other people’swork to improve the efficiency of CdTe solar module, I studied loss mechanism andgrowth mode of CdTe solar cells to have fundamental understanding of polycrystallinefilms. In addition to that, in an effort to make tandem solar cells, I fabricated andcharacterized CdSe solar cells, which is considered as an ideal candidate for the top cellwith its band gap of 1.7 eV.This dissertation is designed to show similarities and differences between CdTeand CdSe solar cells, side by side. After the introduction (Chapter1), I will review thephysical properties of CdTe and CdSe solar cells (Chapter 2). Two primary tools to study defects and surface morphology were photoluminescence (PL) and atomic forcemicroscopy (AFM). PL showed information on the crystallinity and defects of CdTe andCdSe films before and after annealing.(Chapter 3). AFM measurements and their analysisusing scaling theory revealed information on the growth modes of CdTe and CdSefilms.(Chapter 4).With the goal of exploring suitability for tandem structures with ~1.7 eV top celland ~1.1 eV bottom cell, I fabricated and characterized single-junction CdSe devices.(Chapter 5) In addition, for the bottom cell I fabricated HgCdTe cells with Eg~1.1 eV.Single junction HgCdTe and two-terminal CdTe/HgCdTe tandem solar cells werefabricated and characterized. (Chapter 5) 2012 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345260902 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345260902 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. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Physics CdTe CdSe solar cell photovoltaic AFM scaling PL photoluminescence |
| spellingShingle |
Physics CdTe CdSe solar cell photovoltaic AFM scaling PL photoluminescence Kwon, Dohyoung Studies of sputtered CdTe and CdSe solar cells |
| author |
Kwon, Dohyoung |
| author_facet |
Kwon, Dohyoung |
| author_sort |
Kwon, Dohyoung |
| title |
Studies of sputtered CdTe and CdSe solar cells |
| title_short |
Studies of sputtered CdTe and CdSe solar cells |
| title_full |
Studies of sputtered CdTe and CdSe solar cells |
| title_fullStr |
Studies of sputtered CdTe and CdSe solar cells |
| title_full_unstemmed |
Studies of sputtered CdTe and CdSe solar cells |
| title_sort |
studies of sputtered cdte and cdse solar cells |
| publisher |
University of Toledo / OhioLINK |
| publishDate |
2012 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345260902 |
| work_keys_str_mv |
AT kwondohyoung studiesofsputteredcdteandcdsesolarcells |
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1719418814401085440 |