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Gahlot S, Purohit B, Jeanneau E, Mishra S. Coinage Metal Complexes with Di‐tertiary‐butyl Sulfide as Precursors with Ultra‐Low Decomposition Temperature. Chemistry 2021; 27:10826-10832. [DOI: 10.1002/chem.202101471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Indexed: 02/06/2023]
Affiliation(s)
- Sweta Gahlot
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
| | - Bhagyesh Purohit
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
| | - Erwann Jeanneau
- Université Lyon 1 Centre de Diffractométrie Henri Longchambon 5 rue de La Doua 69100 Villeurbanne France
| | - Shashank Mishra
- Université Lyon 1 CNRS UMR 5256 IRCELYON Institut de recherches sur la catalyse et l'environnement de Lyon 2 avenue Albert Einstein 69626 Villeurbanne France
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2
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Portone A, Bellucci L, Convertino D, Mezzadri F, Piccinini G, Giambra MA, Miseikis V, Rossi F, Coletti C, Fabbri F. Deterministic synthesis of Cu 9S 5 flakes assisted by single-layer graphene arrays. NANOSCALE ADVANCES 2021; 3:1352-1361. [PMID: 36132865 PMCID: PMC9419617 DOI: 10.1039/d0na00997k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/01/2021] [Indexed: 06/15/2023]
Abstract
The employment of two-dimensional materials, as growth substrates or buffer layers, enables the epitaxial growth of layered materials with different crystalline symmetries with a preferential crystalline orientation and the synthesis of heterostructures with a large lattice constant mismatch. In this work, we employ single crystalline graphene to modify the sulfurization dynamics of copper foil for the deterministic synthesis of large-area Cu9S5 crystals. Molecular dynamics simulations using the Reax force-field are used to mimic the sulfurization process of a series of different atomistic systems specifically built to understand the role of graphene during the sulphur atom attack over the Cu(111) surface. Cu9S5 flakes show a flat morphology with an average lateral size of hundreds of micrometers. Cu9S5 presents a direct band-gap of 2.5 eV evaluated with light absorption and light emission spectroscopies. Electrical characterization shows that the Cu9S5 crystals present high p-type doping with a hole mobility of 2 cm2 V-1 s-1.
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Affiliation(s)
- A Portone
- NEST, Istituto Nanoscienze - CNR, Scuola Normale Superiore Piazza San Silvestro 12 56127 Pisa Italy
| | - L Bellucci
- NEST, Istituto Nanoscienze - CNR, Scuola Normale Superiore Piazza San Silvestro 12 56127 Pisa Italy
| | - D Convertino
- CNI@NEST, Istituto Italiano di Tecnologia Piazza San Silvestro 12 56127 Pisa Italy
- Graphene Labs, Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - F Mezzadri
- IMEM-CNR Parco Area delle Scienze 37/a Parma 43124 Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma Parco Area delle Scienze 11/A 43124 Parma Italy
| | - G Piccinini
- CNI@NEST, Istituto Italiano di Tecnologia Piazza San Silvestro 12 56127 Pisa Italy
- Scuola Normale Superiore Piazza San Silvestro 12 56127 Pisa Italy
| | - M A Giambra
- CNIT, Sant'Anna Via G. Moruzzi 1 Pisa 56124 Italy
| | - V Miseikis
- CNI@NEST, Istituto Italiano di Tecnologia Piazza San Silvestro 12 56127 Pisa Italy
- Graphene Labs, Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - F Rossi
- IMEM-CNR Parco Area delle Scienze 37/a Parma 43124 Italy
| | - C Coletti
- CNI@NEST, Istituto Italiano di Tecnologia Piazza San Silvestro 12 56127 Pisa Italy
- Graphene Labs, Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - F Fabbri
- NEST, Istituto Nanoscienze - CNR, Scuola Normale Superiore Piazza San Silvestro 12 56127 Pisa Italy
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Hu M, Shen J, Yu Z, Liao RZ, Gurzadyan GG, Yang X, Hagfeldt A, Wang M, Sun L. Efficient and Stable Dye-Sensitized Solar Cells Based on a Tetradentate Copper(II/I) Redox Mediator. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30409-30416. [PMID: 30129357 DOI: 10.1021/acsami.8b10182] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The identification of an efficient and stable redox mediator is of paramount importance for commercialization of dye-sensitized solar cells (DSCs). Herein, we report a new class of copper complexes containing diamine-dipyridine tetradentate ligands (L1 = N, N'-dibenzyl- N, N'-bis(pyridin-2-ylmethyl)ethylenediamine; L2 = N, N'-dibenzyl- N, N'-bis(6-methylpyridin-2-ylmethyl)ethylenediamine) as redox mediators in DSCs. Devices constructed with [Cu(L2)]2+/+ redox couple afford an impressive power conversion efficiency (PCE) of 9.2% measured under simulated one sun irradiation (100 mW cm-2, AM 1.5G), which is among the top efficiencies reported thus far for DSCs with copper complex-based redox mediators. Remarkably, the excellent air, photo, and electrochemical stability of the [Cu(L2)]2+/+ complexes renders an outstanding long-term stability of the whole DSC device, maintaining ∼90% of the initial efficiency over 500 h under continuous full sun irradiation. This work unfolds a new platform for developing highly efficient and stable redox mediators for large-scale application of DSCs.
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Affiliation(s)
- Maowei Hu
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Junyu Shen
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Ze Yu
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Rong-Zhen Liao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Gagik G Gurzadyan
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Xichuan Yang
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Anders Hagfeldt
- Laboratory of Photomolecular Science , École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , Switzerland
| | - Mei Wang
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
| | - Licheng Sun
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Center on Molecular Devices, Institute of Energy Science and Technology , Dalian University of Technology (DUT) , Dalian 116024 , China
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health , KTH Royal Institute of Technology , Stockholm 10044 , Sweden
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Wang G, Hou S, Yan C, Zhang W. A 3D architecture composite of porous vanadium nitride nanoribbons and reduced graphene oxide as a high-efficiency counter electrode for dye-sensitized solar cells. RSC Adv 2018; 8:1083-1088. [PMID: 35538975 PMCID: PMC9077002 DOI: 10.1039/c7ra11279c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 12/12/2017] [Indexed: 01/14/2023] Open
Abstract
A three-dimensional (3D) porous architecture combining porous vanadium nitride nanoribbons with reduced graphene oxide was prepared through a hydrothermal process and subsequent thermal annealing in an ammonia/argon mixed atmosphere. Then, the obtained 3D porous vanadium nitride nanoribbon/reduced graphene oxide (PVNN/RGO) composite was explored as the counter electrode of dye-sensitized solar cells (DSCs). As evidenced by the electrochemical measurements, the 3D PVNN/RGO composite demonstrates excellent electrocatalytic performance, which is comparable to that of Pt. This can be attributed to the fact that the 3D architecture composite of porous vanadium nitride and reduced graphene oxide can simultaneously provide a favorable electrolyte diffusion channel, a fast electron-transport network, and an abundance of efficient electrocatalytic active sites. By employing such PVNN/RGO composite as the counter electrode, the fabricated DSC can achieve a conversion efficiency of 7.43%, which is comparable to that of the conventional Pt counter electrode (7.74%). Therefore, the 3D PVNN/RGO composite is a promising low-cost alternative to the expensive Pt as a counter electrode in DSCs. 3D PVNN/RGO composite electrode with hierarchical porosity exhibits superior photovoltaic performance competing with that of the conventional Pt electrode.![]()
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Affiliation(s)
- Guiqiang Wang
- School of New Energy
- Bohai University
- Jinzhou 121013
- China
| | - Shuo Hou
- School of New Energy
- Bohai University
- Jinzhou 121013
- China
| | - Chao Yan
- School of New Energy
- Bohai University
- Jinzhou 121013
- China
| | - Wei Zhang
- School of New Energy
- Bohai University
- Jinzhou 121013
- China
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