Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Methylammonium tin triiodide (MASnI3) has been successfully employed in lead-free perovskite solar cells, but overall power-conversion efficiencies are still significantly lower than for lead-based perovskites. The photoluminescence (PL) lifetime for this material is also low, which could be the result of high doping density[1] or the effect of traps caused by defects.[2] We evaluate the optoelectronic properties of MASnI3 as a function of temperature from PL spectra and time-resolved PL to reveal the nature of the phase transitions and the influence of impurities on charge-carrier scattering and recombination life times. This could be used to optimise the material further and to gain insight into the general optoelectronic properties of organic-metal-halide perovskites.
[1] N. K. Noel, S. D. Stranks, A. Abate, C. Wehrenfennig, S. Guarnera, A. Haghighirad, A. Sadhanala, G. E. Eperon, S. K. Pathak, M. B. Johnston, A. Petrozza, L. Herz, and H. Snaith, “Lead-Free Organic-Inorganic Tin Halide Perovskites for Photovoltaic Applications,” Energy Environ. Sci., vol. 7, pp. 3061–3068, 2014.
[2] N. K. Noel, A. Abate, S. D. Stranks, E. S. Parrott, V. M. Burlakov, A. Goriely, and H. J. Snaith, “Enhanced Photoluminescence and Solar Cell Performance via Lewis Base Passivation of Organic À Inorganic Lead Halide Perovskites,” ACS Nano, vol. 8, no. 10, pp. 9815–9821, 2014.
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