Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion
Laser cooling in semiconductors has recently been demonstrated in cadmium sulfide nanobelts (NBs) as well as in organic-inorganic lead halide perovskites. Cooling by as much as 40 K has been shown in CdS nanobelts and by as much as 58 K in hybrid perovskite films. This suggests that further progress...
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todo:paper_19327447_v121_n30_p16607_Morozov2023-10-03T16:36:05Z Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion Morozov, Y.V. Draguta, S. Zhang, S. Cadranel, A. Wang, Y. Janko, B. Kuno, M. Cadmium sulfide Cooling Defects Laser cooling Nanobelts Organic lasers Perovskite Photoluminescence Semiconductor lasers Semiconductor quantum wells Anti-Stokes emission Anti-Stokes photoluminescence Band-edge emissions Frequency dependent Halide perovskites Longitudinal optical phonons Optical refrigeration Organic-inorganic II-VI semiconductors Laser cooling in semiconductors has recently been demonstrated in cadmium sulfide nanobelts (NBs) as well as in organic-inorganic lead halide perovskites. Cooling by as much as 40 K has been shown in CdS nanobelts and by as much as 58 K in hybrid perovskite films. This suggests that further progress in semiconductor-based optical refrigeration can ultimately lead to solid state cryocoolers capable of achieving sub 10 K temperatures. In CdS, highly efficient photoluminescence (PL) up-conversion has been attributed to efficient exciton-longitudinal optical (LO) phonon coupling. However, the nature of its efficient anti-Stokes emission has not been established. Consequently, developing a detailed understanding about the mechanism leading to efficient PL up-conversion in CdS NBs is essential to furthering the nascent field of semiconductor laser cooling. In this study, we describe a detailed investigation of anti-Stokes photoluminescence (ASPL) in CdS nanobelts. Temperature- and frequency-dependent band edge emission and ASPL spectroscopies conducted on individual belts as well as ensembles suggest that CdS ASPL is defect-mediated via the involvement of donor-acceptor states. © 2017 American Chemical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19327447_v121_n30_p16607_Morozov |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cadmium sulfide Cooling Defects Laser cooling Nanobelts Organic lasers Perovskite Photoluminescence Semiconductor lasers Semiconductor quantum wells Anti-Stokes emission Anti-Stokes photoluminescence Band-edge emissions Frequency dependent Halide perovskites Longitudinal optical phonons Optical refrigeration Organic-inorganic II-VI semiconductors |
| spellingShingle |
Cadmium sulfide Cooling Defects Laser cooling Nanobelts Organic lasers Perovskite Photoluminescence Semiconductor lasers Semiconductor quantum wells Anti-Stokes emission Anti-Stokes photoluminescence Band-edge emissions Frequency dependent Halide perovskites Longitudinal optical phonons Optical refrigeration Organic-inorganic II-VI semiconductors Morozov, Y.V. Draguta, S. Zhang, S. Cadranel, A. Wang, Y. Janko, B. Kuno, M. Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| topic_facet |
Cadmium sulfide Cooling Defects Laser cooling Nanobelts Organic lasers Perovskite Photoluminescence Semiconductor lasers Semiconductor quantum wells Anti-Stokes emission Anti-Stokes photoluminescence Band-edge emissions Frequency dependent Halide perovskites Longitudinal optical phonons Optical refrigeration Organic-inorganic II-VI semiconductors |
| description |
Laser cooling in semiconductors has recently been demonstrated in cadmium sulfide nanobelts (NBs) as well as in organic-inorganic lead halide perovskites. Cooling by as much as 40 K has been shown in CdS nanobelts and by as much as 58 K in hybrid perovskite films. This suggests that further progress in semiconductor-based optical refrigeration can ultimately lead to solid state cryocoolers capable of achieving sub 10 K temperatures. In CdS, highly efficient photoluminescence (PL) up-conversion has been attributed to efficient exciton-longitudinal optical (LO) phonon coupling. However, the nature of its efficient anti-Stokes emission has not been established. Consequently, developing a detailed understanding about the mechanism leading to efficient PL up-conversion in CdS NBs is essential to furthering the nascent field of semiconductor laser cooling. In this study, we describe a detailed investigation of anti-Stokes photoluminescence (ASPL) in CdS nanobelts. Temperature- and frequency-dependent band edge emission and ASPL spectroscopies conducted on individual belts as well as ensembles suggest that CdS ASPL is defect-mediated via the involvement of donor-acceptor states. © 2017 American Chemical Society. |
| format |
JOUR |
| author |
Morozov, Y.V. Draguta, S. Zhang, S. Cadranel, A. Wang, Y. Janko, B. Kuno, M. |
| author_facet |
Morozov, Y.V. Draguta, S. Zhang, S. Cadranel, A. Wang, Y. Janko, B. Kuno, M. |
| author_sort |
Morozov, Y.V. |
| title |
Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| title_short |
Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| title_full |
Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| title_fullStr |
Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| title_full_unstemmed |
Defect-Mediated CdS Nanobelt Photoluminescence Up-Conversion |
| title_sort |
defect-mediated cds nanobelt photoluminescence up-conversion |
| url |
http://hdl.handle.net/20.500.12110/paper_19327447_v121_n30_p16607_Morozov |
| work_keys_str_mv |
AT morozovyv defectmediatedcdsnanobeltphotoluminescenceupconversion AT dragutas defectmediatedcdsnanobeltphotoluminescenceupconversion AT zhangs defectmediatedcdsnanobeltphotoluminescenceupconversion AT cadranela defectmediatedcdsnanobeltphotoluminescenceupconversion AT wangy defectmediatedcdsnanobeltphotoluminescenceupconversion AT jankob defectmediatedcdsnanobeltphotoluminescenceupconversion AT kunom defectmediatedcdsnanobeltphotoluminescenceupconversion |
| _version_ |
1782027201744470016 |