Inorganic-ligand exchanging time effect in PbS quantum dot solar cell
We investigate time-dependent inorganic ligand exchanging effect and photovoltaic performance of lead sulfide (PbS) nanocrystal films. With optimal processing time, volume shrinkage induced by residual oleic acid of the PbS colloidal quantum dot (CQD) was minimized and a crack-free film was obtained...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
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American Institute of Physics
2016
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| _version_ | 1826269334144548864 |
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| author | Kim, B Hong, J Hou, B Cho, Y Sohn, J Cha, S Kim, J |
| author_facet | Kim, B Hong, J Hou, B Cho, Y Sohn, J Cha, S Kim, J |
| author_sort | Kim, B |
| collection | OXFORD |
| description | We investigate time-dependent inorganic ligand exchanging effect and photovoltaic performance of lead sulfide (PbS) nanocrystal films. With optimal processing time, volume shrinkage induced by residual oleic acid of the PbS colloidal quantum dot (CQD) was minimized and a crack-free film was obtained with improved flatness. Furthermore, sufficient surface passivation significantly increased the packing density by replacing from long oleic acid to a short iodide molecule. It thus facilities exciton dissociation via enhanced charge carrier transport in PbS CQD films, resulting in the improved power conversion efficiency from 3.39% to 6.62%. We also found that excess iodine ions on the PbS surface rather hinder high photovoltaic performance of the CQD solar cell. |
| first_indexed | 2024-03-06T21:23:27Z |
| format | Journal article |
| id | oxford-uuid:424497d9-252d-4609-b172-f7f804abdb42 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:23:27Z |
| publishDate | 2016 |
| publisher | American Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:424497d9-252d-4609-b172-f7f804abdb422022-03-26T14:48:32ZInorganic-ligand exchanging time effect in PbS quantum dot solar cellJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:424497d9-252d-4609-b172-f7f804abdb42Symplectic Elements at OxfordAmerican Institute of Physics2016Kim, BHong, JHou, BCho, YSohn, JCha, SKim, JWe investigate time-dependent inorganic ligand exchanging effect and photovoltaic performance of lead sulfide (PbS) nanocrystal films. With optimal processing time, volume shrinkage induced by residual oleic acid of the PbS colloidal quantum dot (CQD) was minimized and a crack-free film was obtained with improved flatness. Furthermore, sufficient surface passivation significantly increased the packing density by replacing from long oleic acid to a short iodide molecule. It thus facilities exciton dissociation via enhanced charge carrier transport in PbS CQD films, resulting in the improved power conversion efficiency from 3.39% to 6.62%. We also found that excess iodine ions on the PbS surface rather hinder high photovoltaic performance of the CQD solar cell. |
| spellingShingle | Kim, B Hong, J Hou, B Cho, Y Sohn, J Cha, S Kim, J Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title | Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title_full | Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title_fullStr | Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title_full_unstemmed | Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title_short | Inorganic-ligand exchanging time effect in PbS quantum dot solar cell |
| title_sort | inorganic ligand exchanging time effect in pbs quantum dot solar cell |
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