Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation
This study investigated a combination of PbS quantum dots (QDs) and ZnO nanoparticles (NPs) layers in photodiodes for photodetection. Oxygen vacancies in ZnO NPs have been known to be recombination trap sites, hindering carrier transportation. We used various amines to passivate the oxygen vacancy o...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Applied Surface Science Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666523925000145 |
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| author | Po-Hsun Chen Nguyet.N.T. Pham Pei-Cheng Huang Yu-Sian Lin Chia-Tien Peng Cheng-Hsing Lin Chih-Ching Chang Hsueh-Shih Chen |
| author_facet | Po-Hsun Chen Nguyet.N.T. Pham Pei-Cheng Huang Yu-Sian Lin Chia-Tien Peng Cheng-Hsing Lin Chih-Ching Chang Hsueh-Shih Chen |
| author_sort | Po-Hsun Chen |
| collection | DOAJ |
| description | This study investigated a combination of PbS quantum dots (QDs) and ZnO nanoparticles (NPs) layers in photodiodes for photodetection. Oxygen vacancies in ZnO NPs have been known to be recombination trap sites, hindering carrier transportation. We used various amines to passivate the oxygen vacancy of ZnO NPs. It is found that ethanolamine (EA) is the most effective in reducing the surface oxygen vacancies of ZnO, exhibiting a five-fold increase in electron mobility, enhancing PbS QD photodiode responsivity to 278.8 A/W and achieving an external quantum efficiency (EQE) of 36,700% under bias, and increasing the detectivity ∼ 15.5 folds to 8.14 × 10¹² Jones compared with the pure ZnO device. This demonstrates the potential of amines as passivation agents to improve PbS photodiode performance with ZnO NPs as the electron transport layer (ETL). |
| format | Article |
| id | doaj-art-055bf5c55a5f4b559562190360f63a62 |
| institution | Kabale University |
| issn | 2666-5239 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applied Surface Science Advances |
| spelling | doaj-art-055bf5c55a5f4b559562190360f63a622025-02-02T05:29:23ZengElsevierApplied Surface Science Advances2666-52392025-03-0126100705Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivationPo-Hsun Chen0Nguyet.N.T. Pham1Pei-Cheng Huang2Yu-Sian Lin3Chia-Tien Peng4Cheng-Hsing Lin5Chih-Ching Chang6Hsueh-Shih Chen7Department of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; Faculty of Chemistry, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh 70000, VietnamDepartment of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanAUO Corporation, Hsinchu Science Park, Hsinchu 300091, TaiwanAUO Corporation, Hsinchu Science Park, Hsinchu 300091, TaiwanDepartment of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Materials Science & Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; Department of Chemical Engineering & Materials Science, College of Engineering, Yuan Ze University, Taoyuan 32003, Taiwan; Corresponding author at: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.This study investigated a combination of PbS quantum dots (QDs) and ZnO nanoparticles (NPs) layers in photodiodes for photodetection. Oxygen vacancies in ZnO NPs have been known to be recombination trap sites, hindering carrier transportation. We used various amines to passivate the oxygen vacancy of ZnO NPs. It is found that ethanolamine (EA) is the most effective in reducing the surface oxygen vacancies of ZnO, exhibiting a five-fold increase in electron mobility, enhancing PbS QD photodiode responsivity to 278.8 A/W and achieving an external quantum efficiency (EQE) of 36,700% under bias, and increasing the detectivity ∼ 15.5 folds to 8.14 × 10¹² Jones compared with the pure ZnO device. This demonstrates the potential of amines as passivation agents to improve PbS photodiode performance with ZnO NPs as the electron transport layer (ETL).http://www.sciencedirect.com/science/article/pii/S2666523925000145PBSIRPhotodetectionSolarQuantum dotsSensing |
| spellingShingle | Po-Hsun Chen Nguyet.N.T. Pham Pei-Cheng Huang Yu-Sian Lin Chia-Tien Peng Cheng-Hsing Lin Chih-Ching Chang Hsueh-Shih Chen Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation Applied Surface Science Advances PBS IR Photodetection Solar Quantum dots Sensing |
| title | Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation |
| title_full | Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation |
| title_fullStr | Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation |
| title_full_unstemmed | Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation |
| title_short | Enhanced photocurrent and responsivity of PbS quantum Dot/ZnO nanoparticle films with amine passivation |
| title_sort | enhanced photocurrent and responsivity of pbs quantum dot zno nanoparticle films with amine passivation |
| topic | PBS IR Photodetection Solar Quantum dots Sensing |
| url | http://www.sciencedirect.com/science/article/pii/S2666523925000145 |
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