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Properties and mechanisms of iodine doped of P3HT and P3HT/PCBM composites

1 Center for Materials Research, Norfolk State University, 555 Park Avenue, Norfolk, VA 23504, USA
2 PhD Program in Materials Science and Engineering, Norfolk State University, 555 Park Avenue, Norfolk, VA 23504, USA
3 Department of Chemistry, Norfolk State University, 555 Park Avenue, Norfolk, VA 23504, USA

Topical Section: Soft and Polymeric Materials

Polymeric conjugated materials are very promising for developing future soft material based semiconductors, conductors, electronic and optoelectronic devices due to their inherent advantages such as lightweight, flexible shape, low-cost, ease of processability, ease of scalability, etc. Like their inorganic counterparts, the addition of certain minority molecules or dopants can significantly alter the electronic and optoelectronic properties of the host conjugated polymers or composites allowing tunablilty for a variety of electronic/optoelectronic applications. In this report, P3HT and P3HT:PCBM doped with various iodine concentrations or doping levels were systematically examined for potential electronic/optoelectronic properties. This study finds that a 5% mole ratio iodine doping resulting in a smallest P3HT inter-layer gap of about 6.5 nm in the P3HT edge-on main chain packing style as well as smallest exciton bandwidth and most intense or ordered H-style aggregates, which may account for an optimal electronic/optoelectronic performance of the 5% doped P3HT/PCBM device. The results and findings could be useful to understand and to guide the design and development of future generation high efficiency molecular or polymer based optoelectronic devices, including solar cells and photodetectors.
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1. Sun SS, Dalton LR (2016) Introduction to Organic Electronic and Optoelectronic Materials and Dev ices , 2 Eds, Boca Raton: CRC Press/Taylor & Francis.

2. Li Y, Hou J (2016) Major Classes of Conjugated Polymers and Synthetic Strategies, In: Sun SS, Dalton LR, Introduction to Organic Electronic and Optoelectronic Materials and Devices , 2 Eds, Boca Raton: CRC Press/Taylor & Francis, 190–194.

3. Chiang CK, Fincher Jr CR, Park YW, et al. (1977) Electrical Conductivity in Doped Polyacetylene. Phys Rev Lett 39: 1098–1101.    

4. Sun SS (2016) Basic Electronic Structures and Charge Carrier Generation in Organic Optoelectronic Materials, In: Sun SS, Dalton LR, Introduction to Organic Electronic and Optoelectronic Materials and Devices , 2 Eds, Boca Raton: CRC Press/Taylor & Francis, 77–87.

5. Sun SS, Sariciftci NS (2005) Organic Photovoltaics: Mechanisms, Materials, and Devices , Boca Raton: CRC Press/Taylor & Francis.

6. Komarudin D, Morita A, Osakada K, et al. (1988) Iodine Doping of Poly(thiophene-2,5-diyl) and poly(3-Alkylthiophene-2,5-Diyl)s in Aqueous Media. Polym J 30: 860–862.

7. Tian P, Tang L, Xiang J, et al. (2016) Solution Processable High-Performance Infrared Organic Photodetector by Iodine Doping. RSC Adv 6: 45166–45171.    

8. Li G, Shrotriya V, Huang JS, et al. (2006) Polymer Self-Organization Enhances Photovoltaic Efficiency. SPIE Newsroom . Available from: http://spie.org/newsroom/0147-polymer-self- organization-enhances-photovoltaic-efficiency?ArticleID=x8808.

9. Winokur MJ, Wamsley P, Moulton J, et al. (1991) Structural evolution in iodine-doped poly(3-alkylthiophenes). Macromolecules 24: 3812–3815.    

10. Gao J, Niles ET, Grey JK (2013) Aggregates Promote Efficient Charge Transfer Doping of Poly(3-Hexylthiophene). J Phys Chem Lett 4: 2953–2957.    

11. Gao J, Roehling JD, Li Y, et al. (2013) The Effect of 2,3,5,6-Tetrafluoro-7,7,8,8-Tetracyanoquinodimethane Charge Transfer Dopants on the Conformation and Aggregation of poly(3-Hexylthiophene). J Mater Chem C 1: 5638–5646.    

12. Lim E, Peterson KA, Su GM, et al. (2018) Thermoelectric Properties of Poly(3-hexylthiophene) (P3HT) Doped with 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) by Vapor-Phase Infiltration. Chem Mater 30: 998–1010.    

13. Enengl C, Enengl S, Pluczyk S, et al. (2016) Doping-Induced Absorption Bands in P3HT:Polarons and Bipolarons. ChemPhysChem 17: 3836–3844.    

14. Salzmann I, Heimel G, Oehzelt M, et al. (2016) Molecular Electrical Doping of Organic Semiconductors: Fundamental Mechanisms and Emerging Dopant Design Rules. Accounts Chem Res 49: 370–378.    

15. Li P, Chen LJ, Pan J, et al. (2014) Dispersion of P3HT gelation and its influence on the performance of bulk heterojunction organic solar cells based on P3HT:PCBM. Sol Energ Mat Sol C 125: 96–101.    

16. Lüssem B, Riede M, Leo K (2013) Doping of Organic Semiconductors. Phys Status Solidi A 210: 9–43.    

17. Chen TA, Wu X, Rieke RD (1995) Regiocontrolled Synthesis of Poly(3-Alkylthiophenes) Mediated by Rieke Zinc: Their Characterization and Solid-State Properties. J Am Chem Soc 117: 233–244.    

18. Liao HC, Hsu CP, Wu MC, et al. (2013) Conjugated Polymer/nanoparticles Nanocomposites for High Efficient and Real-Time Volatile Organic Compounds Sensors. Anal Chem 85: 9305–9311.    

19. Baghgar M, Barnes MD (2015) Work Function Modification in P3HT H/J Aggregate Nanostructures Revealed by Kelvin Probe Force Microscopy and Photoluminescence Imaging. ACS Nano 9: 7105–7112.    

20. Brown PJ, Thomas DS, Köhler A, et al. (2003) Effect of Interchain Interactions on the Absorption and Emission of poly(3-Hexylthiophene). Phys Rev B 67: 64203.    

21. Endrodi B, Mellár J, Gingl Z, et al. (2015) Molecular and Supramolecular Parameters Dictating the Thermoelectric Performance of Conducting Polymers: A Case Study Using poly(3-Alkylthiophene)s. J Phys Chem C 119: 8472–8479.    

22. Ehrenreich P, Birkhold ST, Zimmermann E, et al. (2016) H-Aggregate Analysis of P3HT Thin Films-Capability and Limitation of Photoluminescence and UV/Vis Spectroscopy. Sci Rep 6: 32434.    

23. Clark J, Chang JF, Spano FC, et al. (2009) Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy. Appl Phys Lett 94: 163306.    

24. Tashiro K, Kobayashi M, Kawai T, et al. (1997) Crystal structural change in poly(3-alkyl thiophene)s induced by iodine doping as studied by an organized combination of X-ray diffraction, Infrared/Raman spectroscopy and computer simulation techniques. Polymer 38: 2867–2879.    

25. Zhuo Z, Zhang F, Wang J, et al. (2011) Efficiency Improvement of Polymer Solar Cells by Iodine Doping. Solid State Electron 63: 83–88.

© 2018 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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