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Park B, Park WW, Choi JY, Choi W, Sung YM, Sul S, Kwon OH, Song H. Pt cocatalyst morphology on semiconductor nanorod photocatalysts enhances charge trapping and water reduction. Chem Sci 2023; 14:7553-7558. [PMID: 37449064 PMCID: PMC10337723 DOI: 10.1039/d3sc01429k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/13/2023] [Indexed: 07/18/2023] Open
Abstract
In photocatalysis, metal-semiconductor hybrid structures have been proposed for ideal photocatalytic systems. In this study, we investigate the effect of morphology and surface nature of Pt cocatalysts on photocatalytic hydrogen evolution activity in Pt-tipped CdSe nanorods. Three distinct morphologies of Pt cocatalysts were synthesized and employed as visible light photocatalysts. The rough tips exhibit the highest activity, followed by the round and cubic tips. Kinetic investigations using transient absorption spectroscopy reveal that the cubic tips exhibit lower charge-separated states feasible for reacting with water and water reduction rates due to their defectless surface facets. In contrast, the rough tips show a similar charge-separation value but a two-fold higher surface reaction rate than the round tips, resulting in a significant enhancement of hydrogen evolution. These findings highlight the importance of rational design on metal cocatalysts in addition to the main semiconductor bodies for maximizing photocatalytic activities.
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Affiliation(s)
- Bumjin Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Won-Woo Park
- Department of Chemistry, Ulsan National Institute of Science and Technology Ulsan 44919 Republic of Korea
| | - Ji Yong Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Woong Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Young Mo Sung
- Analytical Engineering Group, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd Suwon 16678 Republic of Korea
| | - Soohwan Sul
- Analytical Engineering Group, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd Suwon 16678 Republic of Korea
| | - Oh-Hoon Kwon
- Department of Chemistry, Ulsan National Institute of Science and Technology Ulsan 44919 Republic of Korea
| | - Hyunjoon Song
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
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Yuk D, Jee MH, Koh CW, Park WW, Ryu HS, Lee D, Cho S, Rasool S, Park S, Kwon OH, Kim JY, Woo HY. Simplified Y6-Based Nonfullerene Acceptors: In-Depth Study on Molecular Structure-Property Relation, Molecular Dynamics Simulation, and Charge Dynamics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206547. [PMID: 36541782 DOI: 10.1002/smll.202206547] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Two new Y6 derivatives of symmetrical YBO-2O and asymmetrical YBO-FO nonfullerene acceptors (NFAs) are prepared with a simplified synthetic procedure by incorporating octyl and fluorine substituents onto the terminal 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (INCN) moiety. By moving the alkyl substituents on the Y6 core to the terminal INCN moiety, the lowest unoccupied molecular orbital of the YBO NFAs increases without decreasing solubility, resulting in high open-circuit voltages of the devices. Molecular dynamics simulation shows that YBO-2O/-FO preferentially form core-core and terminal-terminal dimeric interactions, demonstrating their tighter packing structure and higher electron mobility than Y6, which is consistent with 2D grazing incidence X-ray scattering and space charge limited current measurements. In blend films, the hole transfer (HT) from YBO-2O/-FO to the polymer donor PM6 is studied in detail by transient absorption spectroscopy, demonstrating efficient HT from YBO-FO to PM6 with their suitable energy level alignment. Despite the simplified synthesis, YBO-FO demonstrates photovoltaic performance similar to that of Y6, exhibiting a power conversion efficiency of 15.01%. Overall, this design strategy not only simplifies the synthetic procedures but also adjusts the electrical properties by modifying the intermolecular packing and energy level alignment, suggesting a novel simplified molecular design of Y6 derivatives.
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Affiliation(s)
- Dohun Yuk
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Min Hun Jee
- Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, 136-713, Republic of Korea
| | - Chang Woo Koh
- Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, 136-713, Republic of Korea
| | - Won-Woo Park
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Hwa Sook Ryu
- Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, 136-713, Republic of Korea
| | - Dongchan Lee
- Department of Physics and EHSRC, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Shinuk Cho
- Department of Physics and EHSRC, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Shafket Rasool
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Sungnam Park
- Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, 136-713, Republic of Korea
| | - Oh-Hoon Kwon
- Department of Chemistry, College of Natural Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jin Young Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Han Young Woo
- Department of Chemistry, Research Institute of Natural Science, Korea University, Seoul, 136-713, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
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Lu H, Chen K, Bobba RS, Shi J, Li M, Wang Y, Xue J, Xue P, Zheng X, Thorn KE, Wagner I, Lin CY, Song Y, Ma W, Tang Z, Meng Q, Qiao Q, Hodgkiss JM, Zhan X. Simultaneously Enhancing Exciton/Charge Transport in Organic Solar Cells by an Organoboron Additive. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205926. [PMID: 36027579 DOI: 10.1002/adma.202205926] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Efficient exciton diffusion and charge transport play a vital role in advancing the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, a facile strategy is presented to simultaneously enhance exciton/charge transport of the widely studied PM6:Y6-based OSCs by employing highly emissive trans-bis(dimesitylboron)stilbene (BBS) as a solid additive. BBS transforms the emissive sites from a more H-type aggregate into a more J-type aggregate, which benefits the resonance energy transfer for PM6 exciton diffusion and energy transfer from PM6 to Y6. Transient gated photoluminescence spectroscopy measurements indicate that addition of BBS improves the exciton diffusion coefficient of PM6 and the dissociation of PM6 excitons in the PM6:Y6:BBS film. Transient absorption spectroscopy measurements confirm faster charge generation in PM6:Y6:BBS. Moreover, BBS helps improve Y6 crystallization, and current-sensing atomic force microscopy characterization reveals an improved charge-carrier diffusion length in PM6:Y6:BBS. Owing to the enhanced exciton diffusion, exciton dissociation, charge generation, and charge transport, as well as reduced charge recombination and energy loss, a higher PCE of 17.6% with simultaneously improved open-circuit voltage, short-circuit current density, and fill factor is achieved for the PM6:Y6:BBS devices compared to the devices without BBS (16.2%).
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Affiliation(s)
- Heng Lu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Kai Chen
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
- Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Raja Sekhar Bobba
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY, 13244, USA
| | - Jiangjian Shi
- CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Mengyang Li
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yilin Wang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jingwei Xue
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Peiyao Xue
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Xiaojian Zheng
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Karen E Thorn
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Isabella Wagner
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Chao-Yang Lin
- Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Yin Song
- School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Wei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zheng Tang
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Qingbo Meng
- CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Quinn Qiao
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY, 13244, USA
| | - Justin M Hodgkiss
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Xiaowei Zhan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Key Laboratory of Eco-functional Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
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Ran G, Su W, Lu H, Liu Y, Bo Z, Zhang W. Intrachain and Interchain Excited-State Dynamics of Temperature-Dependent Aggregation Copolymer in Solution. J Phys Chem B 2022; 126:7393-7399. [DOI: 10.1021/acs.jpcb.2c05156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guangliu Ran
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875, China
| | - Wenli Su
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875, China
| | - Hao Lu
- College of Textiles & Clothing, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China
| | - Yahui Liu
- College of Textiles & Clothing, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China
| | - Zhishan Bo
- College of Textiles & Clothing, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China
| | - Wenkai Zhang
- Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing 100875, China
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