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Ashok Kumar S, Gouthaman S, Shankar JS, Periyasamy BK, Nayak SK. Stable and color tunable MEH-PPV/PMMA polymer blends for light-emitting applications. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138462] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hu S, Liao Y, Zhang Y, Yan X, Zhao Z, Chen W, Zhang X, Liu H, Li H, Li L, Sun M, Sheng C. Effect of Thermal Annealing on Conformation of MEH-PPV Chains in Polymer Matrix: Coexistence of H- and J-Aggregates. Polymers (Basel) 2020; 12:polym12081771. [PMID: 32784767 PMCID: PMC7465953 DOI: 10.3390/polym12081771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 11/16/2022] Open
Abstract
In diluted solid solution using poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) and polymethyl methacrylate (PMMA) or polystyrene (PS), both aggregated and extended conformations could be formed according to the weight ratio. Aggregated conformation in as-cast MEH-PPV/PMMA film presented a J-aggregate-like photoluminescence (PL) emission. After annealing at 160 °C, its PL showed characteristics of both J- and H-aggregates at the same time; however, extended conformation showed an oligomer-like emission, which was not sensitive to either measurement temperature or annealing temperature. Thus, the conformation transition between aggregated and extended is unlikely to happen in MEH-PPV/PMMA blends during thermal annealing. On the contrary, in MEH-PPV/PS blends, extended conformation dominated in as-cast film with oligomer-like emissions; after annealing at 160 °C, both J- and H- aggregate-like PL emissions were observed, indicating the conformation transitioned from extended to aggregated. Therefore, our work may suggest a new method to manipulate photophysical properties of conjugated polymers by combining appropriate host matrix and thermal annealing processes.
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Affiliation(s)
- Shu Hu
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Yang Liao
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Yang Zhang
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Xiaoliang Yan
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Zhenlu Zhao
- Beijing Spacecrafts, Beijing 100094, China; (Z.Z.); (W.C.); (X.Z.); (H.L.)
| | - Weiqiang Chen
- Beijing Spacecrafts, Beijing 100094, China; (Z.Z.); (W.C.); (X.Z.); (H.L.)
| | - Xin Zhang
- Beijing Spacecrafts, Beijing 100094, China; (Z.Z.); (W.C.); (X.Z.); (H.L.)
| | - Hongxing Liu
- Beijing Spacecrafts, Beijing 100094, China; (Z.Z.); (W.C.); (X.Z.); (H.L.)
| | - Heng Li
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Li Li
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
| | - Ming Sun
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
- Correspondence: (M.S.); (C.S.)
| | - Chuanxiang Sheng
- School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (S.H.); (Y.L.); (Y.Z.); (X.Y.); (H.L.); (L.L.)
- Correspondence: (M.S.); (C.S.)
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