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Ogundele AK, Mola GT. Semiconductor quantum dots as a mechanism to enhance charge transfer processes in polymer solar cells. CHEMOSPHERE 2023; 345:140453. [PMID: 37844707 DOI: 10.1016/j.chemosphere.2023.140453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/20/2023] [Accepted: 10/12/2023] [Indexed: 10/18/2023]
Abstract
The light trapping capability of thin film polymer solar absorber, composed of poly (3-hexylthiophene) and [6,6]-phenyl C61- butyric acid methyl ester (P3HT:PC60BM) blend, is improved using ZnS semiconductor quantum dots (QD) as third donor-acceptor (D:A) component. The inherent characteristics of the microwave-assisted synthesized ZnS QD, such as quantum size effect, and multiple exciton generation were leveraged in harvesting high energy photons, which resulted in a better exciton generation, dissociation, and effective charge transport in the polymer medium. The synthesized QD exhibited good phase purity, effective kinetic enhancement, and control of the aggregation process. Hence, the impact of ZnS QD on the performance of thin film polymer solar cells (TFPSC) is evident by a remarkable improvement in the measured photovoltaic parameters. Nonetheless, it is observed that the device performances are generally dependent on the concentration of the QD in the absorber layer. Consequently, the power conversion efficiency has increased by 58% at 3% concentration of QDs by weight. This is an interesting development of TFPSC fabricated under an ambient environment.
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Affiliation(s)
- Abiodun Kazeem Ogundele
- School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville, 3209, South Africa
| | - Genene Tessema Mola
- School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville, 3209, South Africa.
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Chiu CH, Chen YT, Shen JL. Quantum dots derived from two-dimensional transition metal dichalcogenides: synthesis, optical properties and optoelectronic applications. NANOTECHNOLOGY 2023; 34:482001. [PMID: 37607498 DOI: 10.1088/1361-6528/acf29c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/21/2023] [Indexed: 08/24/2023]
Abstract
Zero-dimensional transition metal dichalcogenides (TMD) quantum dots (QDs) have attracted a lot of attention due to their interesting fundamental properties and various applications. Compared to TMD monolayers, the QD counterpart exhibits larger values for direct transition energies, exciton binding energies, absorption coefficient, luminescence efficiency, and specific surface area. These characteristics make them useful in optoelectronic devices. In this review, recent exciting progress on synthesis, optical properties, and applications of TMD QDs is highlighted. The first part of this article begins with a brief description of the synthesis approaches, which focus on microwave-assistant heating and pulsed laser ablation methods. The second part introduces the fundamental optical properties of TMD QDs, including quantum confinement in optical absorption, excitation-wavelength-dependent photoluminescence, and many-body effects. These properties are highlighted. In the third part, we discuss lastest advancements in optoelectronic devices based on TMD QDs These devices include light-emitting diodes, solar cells, photodetectors, optical sensors, and light-controlled memory devices. Finally, a brief summary and outlook will be provided.
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Affiliation(s)
- Ching-Hsueh Chiu
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
| | - Yu-Ting Chen
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
| | - Ji-Lin Shen
- Department of Physics, Center for Nanotechnology, and Research Center for Crystalline Materials and Optoelectronic Characterization, Chung Yuan Christian University, Chung-Li, 320314, Taiwan
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Park KH, Yang JY, Jung S, Ko BM, Song G, Hong SJ, Kim NC, Lee D, Song SH. Metallic Phase Transition Metal Dichalcogenide Quantum Dots as Promising Bio-Imaging Materials. NANOMATERIALS 2022; 12:nano12101645. [PMID: 35630867 PMCID: PMC9144094 DOI: 10.3390/nano12101645] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/16/2022] [Accepted: 05/09/2022] [Indexed: 02/01/2023]
Abstract
Transition metal dichalcogenide-based quantum dots are promising materials for applications in diverse fields, such as sensors, electronics, catalysis, and biomedicine, because of their outstanding physicochemical properties. In this study, we propose bio-imaging characteristics through utilizing water-soluble MoS2 quantum dots (MoS2-QDs) with two different sizes (i.e., ~5 and ~10 nm). The structural and optical properties of the fabricated metallic phase MoS2-QDs (m-MoS2-QDs) were characterized by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, UV–vis absorption spectroscopy, and photoluminescence. The synthesized m-MoS2-QDs showed clear photophysical characteristic peaks derived from the quantum confinement effect and defect sites, such as oxygen functional groups. When the diameter of the synthesized m-MoS2-QD was decreased, the emission peak was blue-shifted from 436 to 486 nm under excitation by a He-Cd laser (325 nm). Density functional theory calculations confirmed that the size decrease of m-MoS2-QDs led to an increase in the bandgap because of quantum confinement effects. In addition, when incorporated into the bio-imaging of HeLa cells, m-MoS2-QDs were quite biocompatible with bright luminescence and exhibited low toxicity. Our results are commercially applicable for achieving high-performance bio-imaging probes.
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Affiliation(s)
- Kwang Hyun Park
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Jun Yong Yang
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Sunggyeong Jung
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Byoung Min Ko
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Gian Song
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Soon-Jik Hong
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
| | - Nam Chul Kim
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
- Correspondence: (N.C.K.); (D.L.); (S.H.S.); Tel.: +82-0415219379 (S.H.S.)
| | - Dongju Lee
- Department of Advanced Materials Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju 34057, Chungbuk, Korea
- Correspondence: (N.C.K.); (D.L.); (S.H.S.); Tel.: +82-0415219379 (S.H.S.)
| | - Sung Ho Song
- Division of Advanced Materials Engineering, Center for Advanced Powder Materials and Parts, Kongju National University, Cheonan 32588, Chungnam, Korea; (K.H.P.); (J.Y.Y.); (S.J.); (B.M.K.); (G.S.); (S.-J.H.)
- Correspondence: (N.C.K.); (D.L.); (S.H.S.); Tel.: +82-0415219379 (S.H.S.)
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