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Wang L, Zhang L, Kim S, Wang T, Yuan Z, Yang C, Hu Y, Zhao X, Chen Y. Halogen-Free Donor Polymers Based on Dicyanobenzotriazole with Low Energy Loss and High Efficiency in Organic Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206607. [PMID: 36717277 DOI: 10.1002/smll.202206607] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/17/2022] [Indexed: 05/04/2023]
Abstract
Halogenation of organic semiconductors is an efficient strategy for improving the performance of organic solar cells (OSCs), while the introduction of halogens usually involves complex synthetic process and serious environment pollution problems. Herein, three halogen-free ternary copolymer donors (PCNx, x = 3, 4, 5) based on electron-withdrawing dicyanobenzotriazole are reported. When blended with the Y6, PCN3 with strong interchain interactions results in appropriate crystallinity and thermodynamic miscibility of the blend film. Grazing-incidence wide-angle X-ray scattering measurements indicate that PCN3 has more ordered arrangement and stronger π-π stacking than previous PCN2. Fourier-transform photocurrent spectroscopy and external quantum efficiency of electroluminescence measurements show that PCN3-based OSCs have lower energy loss than PCN2, which leads to their higher open-circuit voltage (0.873 V). The device based on PCN3 reaches power conversion efficiency (PCE) of 15.33% in binary OSCs, one of the highest values for OSCs with halogen-free donor polymers. The PCE of 17.80% and 18.10% are obtained in PM6:PCN3:Y6 and PM6:PCN3:BTP-eC9 ternary devices, much higher than those of PM6:Y6 (16.31%) and PM6:BTP-eC9 (17.33%) devices. Additionally, this ternary OSCs exhibit superior stability compared to binary host system. This work gives a promising path for halogen-free donor polymers to achieve low energy loss and high PCE.
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Affiliation(s)
- Lei Wang
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
| | - Lifu Zhang
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, P. R. China
| | - Seoyoung Kim
- School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 44919, South Korea
| | - Tingting Wang
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
| | - Zhongyi Yuan
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
| | - Changduk Yang
- Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 44919, South Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 44919, South Korea
| | - Yu Hu
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
| | - Xiaohong Zhao
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
| | - Yiwang Chen
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P. R. China
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, P. R. China
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Synthesis of oligoacenes using precursors for evaluation of their electronic structures. Photochem Photobiol Sci 2022; 21:1511-1532. [PMID: 35670917 DOI: 10.1007/s43630-022-00235-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 04/13/2022] [Indexed: 10/18/2022]
Abstract
Acenes, which are hydrocarbons comprising linearly fused benzene rings, have attracted considerable attention owing to their electronic structures and utility as organic electronic materials. However, the ease with which oligoacenes undergo oxidation increases with the number of linearly fused benzene rings owing to the increased energy of the highest occupied molecular orbital. The synthesis of naked oligoacenes with seven or more benzene rings is difficult because their open-shell structure renders them unstable. The recent development of a precursor method has enabled the in situ synthesis of oligoacenes under specific conditions and the spectroscopic observation of oligoacene in single crystals, in film matrices and under cryogenic conditions. Scanning tunneling microscopy and non-contact atomic force microscopy under ultra-high vacuum conditions have also made significant advances in the study of oligoacenes and oligoazaacenes. This paper reviews the recent progress in the synthesis of oligoacenes using precursors, with a particular focus on the chemical structures, synthesis, and reactivity of the precursors. The electronic properties of oligoacenes are also discussed in relation to the number of fused benzene rings, including their energy levels and spin states. These results will contribute to the synthesis and development of carbon nanomaterials with applications in the field of organic electronics.
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Maeda A, Nakauchi A, Shimizu Y, Terai K, Sugii S, Hayashi H, Aratani N, Suzuki M, Yamada H. A Windmill-Shaped Molecule with Anthryl Blades to Form Smooth Hole-Transport Layers via a Photoprecursor Approach. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2316. [PMID: 32443467 PMCID: PMC7287758 DOI: 10.3390/ma13102316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/11/2020] [Accepted: 05/15/2020] [Indexed: 01/24/2023]
Abstract
Preparation of high-performance organic semiconductor devices requires precise control over the active-layer structure. To this end, we are working on the controlled deposition of small-molecule semiconductors through a photoprecursor approach wherein a soluble precursor compound is processed into a thin-film form and then converted to a target semiconductor by light irradiation. This approach can be applied to layer-by-layer solution deposition, enabling the preparation of p-i-n-type photovoltaic active layers by wet processing. However, molecular design principles are yet to be established toward obtaining desirable thin-film morphology via this unconventional method. Herein, we evaluate a new windmill-shaped molecule with anthryl blades, 1,3,5-tris(5-(anthracen-2-yl)thiophen-2-yl)benzene, which is designed to deposit via the photoprecursor approach for use as the p-sublayer in p-i-n-type organic photovoltaic devices (OPVs). The new compound is superior to the corresponding precedent p-sublayer materials in terms of forming smooth and homogeneous films, thereby leading to improved performance of p-i-n OPVs. Overall, this work demonstrates the effectiveness of the windmill-type architecture in preparing high-quality semiconducting thin films through the photoprecursor approach.
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Affiliation(s)
- Akihiro Maeda
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Aki Nakauchi
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Yusuke Shimizu
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Kengo Terai
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Shuhei Sugii
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Hironobu Hayashi
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Naoki Aratani
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
| | - Mitsuharu Suzuki
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroko Yamada
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan; (A.M.); (A.N.); (Y.S.); (K.T.); (S.S.); (H.H.); (N.A.)
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Inoue S, Higashino T, Arai S, Kumai R, Matsui H, Tsuzuki S, Horiuchi S, Hasegawa T. Regioisomeric control of layered crystallinity in solution-processable organic semiconductors. Chem Sci 2020; 11:12493-12505. [PMID: 34976335 PMCID: PMC8647348 DOI: 10.1039/d0sc04461j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/16/2020] [Indexed: 11/21/2022] Open
Abstract
The construction and control of 2D layered molecular packing motifs with functionally substituted π-electron cores are crucial for developing organic electronic materials and devices. We investigated a regioisomeric structure–property relationship in high-performance and solution-processable layered organic semiconductors based on mono-octyl-substituted benzothieno[3,2-b]naphtho[2,3-b]thiophene (mono-C8-BTNT). We demonstrated that an isomorphous bilayer-type layered herringbone packing motif is obtainable in a series of four positional isomers of mono-C8-BTNTs whose π-electron core is substituted by an octyl chain at one of the four most peripheral positions with roughly keeping the rod-like molecular shape. These regioisomeric compounds exhibited systematic variations in the solvent solubility and liquid-crystalline phase transitions at elevated temperatures. The analysis of intermolecular interaction energies in the crystals based on dispersion-corrected DFT calculations revealed that the crystals of 2- and 8-mono-C8-BTNTs are more stable than those of 3- and 9-mono-C8-BTNTs owing to the higher ordering of alkyl chain layers in the crystals. Such differences of the stability in their crystal formation are closely correlated with TFT performances, where the single-crystal devices of the 2- and 8-mono-C8-BTNTs substituted at the most peripheral positions exhibit high-performance TFT characteristics with a mobility of approximately 10 cm2 V−1 s−1. An isomorphous bilayer-type layered herringbone crystal packing is reported for a series of four positional isomers of mono-C8-BTNTs, where the single-crystal devices with the isomers exhibit high-performance TFT characteristics.![]()
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Affiliation(s)
- Satoru Inoue
- Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113 8656, Japan
| | - Toshiki Higashino
- Research Institute for Advanced Electronics and Photonics (RIAEP), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Shunto Arai
- Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113 8656, Japan
| | - Reiji Kumai
- Condensed Matter Research Centre (CMRC) and Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Hiroyuki Matsui
- Research Center for Organic Electronics, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Seiji Tsuzuki
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
| | - Sachio Horiuchi
- Research Institute for Advanced Electronics and Photonics (RIAEP), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Tatsuo Hasegawa
- Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113 8656, Japan
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