PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications
Lead telluride (PbTe) quantum dots, despite being considered as one of the most promising candidates for future photovoltaics owing to their higher multiple exciton generation yields, have received limited attention in solar cell designs due their less explored surface chemistry and high air sensiti...
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| Format: | Article |
| Language: | English |
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Suleyman Demirel University
2021-11-01
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| Series: | Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/pub/sdufeffd/issue/65893/891908 |
| _version_ | 1797906289504813056 |
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| author | Tuğba Hacıefendioğlu Demet Asil |
| author_facet | Tuğba Hacıefendioğlu Demet Asil |
| author_sort | Tuğba Hacıefendioğlu |
| collection | DOAJ |
| description | Lead telluride (PbTe) quantum dots, despite being considered as one of the most promising candidates for future photovoltaics owing to their higher multiple exciton generation yields, have received limited attention in solar cell designs due their less explored surface chemistry and high air sensitivity. This study demonstrates the synthesis and characterization of highly crystalline PbTe QDs and their utilization in solution processed solar cells through band alignment engineering. Ultraviolet photoelectron spectroscopy studies showed that the conduction and valence band levels depend strongly on the type of surface ligand utilized for the ligand exchange process. Conduction and valence band levels of tetrabutylammonium iodide (TBAI) and 1,2-ethanedithiol (EDT) treated PbTe QDs with respect to vacuum were measured as -3.73 eV/-4.83 eV and -3.48 eV/-4.45 eV, respectively. The presence of a band offset between the conduction and valence band levels of TBAI and EDT treated layers allowed us to engineer the band alignment in the light absorbing layer. As a result, solar cells where TBAI and EDT ligand treated QDs were utilized in a bilayer cell architecture reached a photo conversion efficiency of 0.65%. |
| first_indexed | 2024-04-10T10:18:32Z |
| format | Article |
| id | doaj.art-09004e545ef14942b2465dd26dff7367 |
| institution | Directory Open Access Journal |
| issn | 1306-7575 |
| language | English |
| last_indexed | 2024-04-10T10:18:32Z |
| publishDate | 2021-11-01 |
| publisher | Suleyman Demirel University |
| record_format | Article |
| series | Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi |
| spelling | doaj.art-09004e545ef14942b2465dd26dff73672023-02-15T16:21:43ZengSuleyman Demirel UniversitySüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi1306-75752021-11-0116243444310.29233/sdufeffd.8919081113PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic ApplicationsTuğba Hacıefendioğlu0Demet Asil1ORTA DOĞU TEKNİK ÜNİVERSİTESİORTA DOĞU TEKNİK ÜNİVERSİTESİLead telluride (PbTe) quantum dots, despite being considered as one of the most promising candidates for future photovoltaics owing to their higher multiple exciton generation yields, have received limited attention in solar cell designs due their less explored surface chemistry and high air sensitivity. This study demonstrates the synthesis and characterization of highly crystalline PbTe QDs and their utilization in solution processed solar cells through band alignment engineering. Ultraviolet photoelectron spectroscopy studies showed that the conduction and valence band levels depend strongly on the type of surface ligand utilized for the ligand exchange process. Conduction and valence band levels of tetrabutylammonium iodide (TBAI) and 1,2-ethanedithiol (EDT) treated PbTe QDs with respect to vacuum were measured as -3.73 eV/-4.83 eV and -3.48 eV/-4.45 eV, respectively. The presence of a band offset between the conduction and valence band levels of TBAI and EDT treated layers allowed us to engineer the band alignment in the light absorbing layer. As a result, solar cells where TBAI and EDT ligand treated QDs were utilized in a bilayer cell architecture reached a photo conversion efficiency of 0.65%.https://dergipark.org.tr/tr/pub/sdufeffd/issue/65893/891908lead telluridepbte quantum dotssolar cellstbaiband alignment |
| spellingShingle | Tuğba Hacıefendioğlu Demet Asil PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi lead telluride pbte quantum dots solar cells tbai band alignment |
| title | PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications |
| title_full | PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications |
| title_fullStr | PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications |
| title_full_unstemmed | PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications |
| title_short | PbTe Quantum Dots and Engineering of the Energy Band Alignment in Photovoltaic Applications |
| title_sort | pbte quantum dots and engineering of the energy band alignment in photovoltaic applications |
| topic | lead telluride pbte quantum dots solar cells tbai band alignment |
| url | https://dergipark.org.tr/tr/pub/sdufeffd/issue/65893/891908 |
| work_keys_str_mv | AT tugbahacıefendioglu pbtequantumdotsandengineeringoftheenergybandalignmentinphotovoltaicapplications AT demetasil pbtequantumdotsandengineeringoftheenergybandalignmentinphotovoltaicapplications |