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2. Improving Hole Densities and Minority Carrier Lifetimes of Cadmium Telluride Solar Cells

Author

Amarasinghe, Mahisha

Subjects
Uncategorized
Abstract

The objective of this thesis is to address two of the main components that affect the VOC of polycrystalline cadmium telluride (CdTe) thin-film solar cells, namely improving the carrier lifetime and carrier concentration (doping). In order to reduce carrier recombination and increase carrier lifetimes in the device, strategies with and without Cl and Se are developed, to reduce and passivate the inherent recombination centers (grain boundaries, interfaces, intra-grain defects) in polycrystalline CdTe devices. Grain sizes in the order of 1 mm are achieved and mechanisms driving lifetimes exceeding 1 ��s are discussed. Moreover, hole concentrations that are orders of magnitude higher than the standard 1014 cm-3 values (seen for traditional Cu doping), are achieved with Group-V dopants like P, As, and Sb. In the future, non-Cl methods would need to be developed not only for dopant activation but defect passivation and grain growth to overcome current material and device limitations

Published
2021
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4. Exceeding 200 ns Lifetimes in Polycrystalline CdTe Solar Cells

Author

Ablekim, Tursun, primary, Duenow, Joel N., additional, Perkins, Craig L., additional, Moseley, John, additional, Zheng, Xin, additional, Bidaud, Thomas, additional, Frouin, Berengere, additional, Collin, Stephane, additional, Reese, Matthew O., additional, Amarasinghe, Mahisha, additional, Colegrove, Eric, additional, Johnston, Steve, additional, and Metzger, Wyatt K., additional

Published
2021
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11. Influence of CdTe Deposition Temperature and Window Thickness on CdTe Grain Size and Lifetime After CdCl 2 Recrystallization

Author

Amarasinghe, Mahisha, primary, Sivananthan, Siva, additional, Metzger, Wyatt K., additional, Colegrove, Eric, additional, Moutinho, Helio, additional, Albin, David, additional, Duenow, Joel, additional, Johnston, Steve, additional, Kephart, Jason, additional, Sampath, Walajabad, additional, and Al-Jassim, Mowafak, additional

Published
2018
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12. Obtaining Large Columnar CdTe Grains and Long Lifetime on Nanocrystalline CdSe, MgZnO, or CdS Layers

Author

Amarasinghe, Mahisha, primary, Colegrove, Eric, additional, Moseley, John, additional, Moutinho, Helio, additional, Albin, David, additional, Duenow, Joel, additional, Jensen, Soren, additional, Kephart, Jason, additional, Sampath, Walajabad, additional, Sivananthan, Siva, additional, Al‐Jassim, Mowafak, additional, and Metzger, Wyatt K., additional

Published
2018
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