Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system
To absorb the photons below the band-gap energy effectively, we proposed a quantum dot (QD) photocell modeled by multi-level system for the quantum yields and photo-to-charge efficiency limits. The theoretical results show the quantum yields are enhanced as compared to the single band-gap solar cell...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab473a |
| _version_ | 1797750396607791104 |
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| author | Shun-Cai Zhao Jing-Yi Chen |
| author_facet | Shun-Cai Zhao Jing-Yi Chen |
| author_sort | Shun-Cai Zhao |
| collection | DOAJ |
| description | To absorb the photons below the band-gap energy effectively, we proposed a quantum dot (QD) photocell modeled by multi-level system for the quantum yields and photo-to-charge efficiency limits. The theoretical results show the quantum yields are enhanced as compared to the single band-gap solar cell, and the photo-to-charge efficiencies are larger than Shockley and Queisser efficiency in the same absorbed spectrum. What is more, at the room temperature the efficiency limits are well beyond 63% achieved by Luque and Marti (1997 Phys. Rev. Lett. 78 5014) due to absorbing the low-energy photons via two sub-bands in this proposed photocell system. The achievements may reveal a novel theoretical approach to enhance the QD photocell performance modeled a multi-level absorbing photons system. |
| first_indexed | 2024-03-12T16:33:11Z |
| format | Article |
| id | doaj.art-230611f65da14984b81d5e1c3a4fc626 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:33:11Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-230611f65da14984b81d5e1c3a4fc6262023-08-08T15:24:00ZengIOP PublishingNew Journal of Physics1367-26302019-01-01211010301510.1088/1367-2630/ab473aEnhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level systemShun-Cai Zhao0https://orcid.org/0000-0003-1565-6208Jing-Yi Chen1Department of Physics, Faculty of Science, Kunming University of Science and Technology , Kunming, 650500, People's Republic of ChinaDepartment of Physics, Faculty of Science, Kunming University of Science and Technology , Kunming, 650500, People's Republic of ChinaTo absorb the photons below the band-gap energy effectively, we proposed a quantum dot (QD) photocell modeled by multi-level system for the quantum yields and photo-to-charge efficiency limits. The theoretical results show the quantum yields are enhanced as compared to the single band-gap solar cell, and the photo-to-charge efficiencies are larger than Shockley and Queisser efficiency in the same absorbed spectrum. What is more, at the room temperature the efficiency limits are well beyond 63% achieved by Luque and Marti (1997 Phys. Rev. Lett. 78 5014) due to absorbing the low-energy photons via two sub-bands in this proposed photocell system. The achievements may reveal a novel theoretical approach to enhance the QD photocell performance modeled a multi-level absorbing photons system.https://doi.org/10.1088/1367-2630/ab473aquantum dot photocell modeled by a multi-level systemphoto-to-charge efficiencylow-energy photonsquantum yields |
| spellingShingle | Shun-Cai Zhao Jing-Yi Chen Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system New Journal of Physics quantum dot photocell modeled by a multi-level system photo-to-charge efficiency low-energy photons quantum yields |
| title | Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system |
| title_full | Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system |
| title_fullStr | Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system |
| title_full_unstemmed | Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system |
| title_short | Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system |
| title_sort | enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi level system |
| topic | quantum dot photocell modeled by a multi-level system photo-to-charge efficiency low-energy photons quantum yields |
| url | https://doi.org/10.1088/1367-2630/ab473a |
| work_keys_str_mv | AT shuncaizhao enhancedquantumyieldsandefficiencyinaquantumdotphotocellmodeledbyamultilevelsystem AT jingyichen enhancedquantumyieldsandefficiencyinaquantumdotphotocellmodeledbyamultilevelsystem |