Effects of PBr<sub>3</sub> Addition to Polysilane Thin Films on Structures and Photovoltaic Properties
- 1 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 2 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 3 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 4 Department of Materials Science, The University of Shiga Prefecture, Hikone, Japan
- 5 Osaka Gas Co., Ltd., Osaka, Japan
- 6 Osaka Gas Chemicals Co., Ltd., Osaka, Japan
- 7 Osaka Gas Chemicals Co., Ltd., Osaka, Japan
Abstract
Organic thin film solar cells are potential next generation solar cells. Many p-type semiconductors have been used in organic solar cells, but there have been far fewer reports involving n-type organic semiconductors. Developing new n-type organic semiconductors is therefore desirable. Polysilane thin films were spin-coated from solutions containing phosphorus (P), and the effects of P addition on film microstructures and electronic properties as n-type semiconductors were investigated. Microstructures of poly-methyl-phenyl-silane (PMPS), dimethyl-polysilane (DMPS) and deca-phenyl-penta-silane (DPPS) thin films were investigated by X-ray diffraction and transmission electron microscopy. PMPS thin films doped with P (PMPS(P)) were amorphous upon annealing at 300 ° C , while DMPS(P) and DPPS(P) thin films exhibited crystalline structures. PMPS(P) and DMPS(P) thin films exhibited decreased electrical resistances upon P doping. The energy gaps of PMPS(P), DMPS(P) and DPPS(P) were 3.5, 3.9 and 3.8 eV, respectively. Decreased photoluminescence intensities of PMPS, DMPS and DPPS were observed upon P doping. The desorption of phenyl and methyl groups from PMPS(P) thin films was observed from Raman scattering measurements. Solar cells containing polysilane(P)/poly[3-hexylthiophene] heterojunction structures were fabricated and exhibited photovoltaic behavior.
- Lee, J., Seoul, C., Park, J. and York, J. (2004) Fullerene/poly(methylphenylsilane) (PMPS) Organic Photovoltaic Cells. Synthetic Metals, 145, 11-14. https://doi.org/10.1016/j.synthmet.2004.04.022
- Silence, S., Scott, J., Hache, F., Ginsbrug, E., Jenkner, P., Miller, P., Twieg, R. and Moermer, W. (1993) Poly(silane)-Based High-Mobility Photorefractive Polymers. Journal of the Optical Society of America B, 10, 2306-2312. https://doi.org/10.1364/josab.10.002306
- Jung, J., Ciesielski, W. and Ulanski, J. (2006) Photovoltaic Effect in Novel Polysilane with Phenothiazine Rings and Its Blends with Fullerene. Materials Science-Poland, 24, 527-534.
- Masuda, T., Matsuki, Y. and Simoda, T. (2012) Stability of Polydihydrosilane Liquid Films on Solid Substrates. Thin Solid Films, 520, 5091-5096. https://doi.org/10.1016/j.tsf.2012.03.043
- Masuda, T., Matsuki, Y. and Simoda, T. (2012) Pyrolytic Transformation from Polydihydrosilane to Hydrogenated Amorphous Silicon Film. Thin Solid Films, 520, 6603-6607. https://doi.org/10.1016/j.tsf.2012.07.028
- Masuda, T., Matsuki, Y. and Simoda, T. (2009) Spectral Parameters and hamaker Constants of Silicon Hydride Compounds and Organic Solvents. Journal of Colloid and Interface Science, 340, 298-305. https://doi.org/10.1016/j.jcis.2009.08.028
- Iyer, G.R.S., Hobbie, E.K., Guruvenket, S., Hoey, J.M., Anderson, K.J., Lovaasen, J., Gette, C., Schulz, D.L., Swenson, O.F., Elangovan, A. and Boudjouk, P. (2012) Solution-Based Synthesis of Crystalline Silicon from Liquid Silane through Laser and Chemical Annealing. Applied Materials and Interfaces, 4, 2680-2685. https://doi.org/10.1021/am300334p
- Shimoda, T., Matsuki, Y., Furusawa, M., Aoki, T., Yudasaka, I., Tanaka, H., Iwasaki, H., Wang, D., Miyasaka, M. and Takeuchi, Y. (2006) Solution-Processed Silicon Films and Transistors. Nature, 440, 783-786. https://doi.org/10.1038/nature04613
- Nakagawa, J., Oku, T., Suzuki, A., Akiyama, T., Tokumitsu, K., Yamada, M. and Nakamura, N. (2012) Fabrication and Characterization of Polysilane/C60 Thin Film Solar Cells. Journal of Physics Conference Series, 352, 012019-1-5. https://doi.org/10.1088/1742-6596/352/1/012019
- Kawashima, A., Oku, T., Suzuki, A., Kikuchi, K. and Kikuchi, S. (2012) Microstructures and Photovoltaic Properties of Polysilane/C60-Based Solar Cells. Materials Science and Applications, 3, 557-561. https://doi.org/10.4236/msa.2012.38079
- Masuda, T., Sotani, N., Hamada, H., Matsuki, Y. and Simoda, T. (2012) Fabrication of Solution-Processed Hydrogenated Amorphous Silicon Single-Junction Solar Cells. Applied Physics Letters, 100, Article ID: 253908. https://doi.org/10.1063/1.4730614