AMADEus Seminar - Prof. Henk Bolink - Thursday 19 June 2014, 04:00 pm - Amphi 1 ENSCBP

Abstract: Recently, organic-inorganic perovskites were identified as promising absorbers for solar cells.1 In the three years since, the performance of perovskite-based solar cells has improved rapidly to reach efficiencies as high as 15 %.2-4 We developed metal oxide free methylammonium lead iodide perovskite cells with high power-conversion efficiencies.5 The effect of the organic charge transporting layers on the
performance of these solar cells will be presented as well as the effect of different layer thicknesses. The power conversion efficiency increases from 4.7 % for a device with only an organic hole transporting/electron blocking layer to 12 % when the perovskite layer is sandwiched in between suitable organic electron and hole blocking layers. We will present recent developments in these metal oxide free perovskite solar cells, such as semi-transparent and flexible as well as insight to their operational mechanism.
1 Kojima, A., Teshima, K., Shirai, Y. & Miyasaka, T. Organometal Halide Perovskites as Visible?Light Sensitizers for Photovoltaic Cells. JACS 131, 6050?6051 (2009).
2 Liu, D. & Kelly, T. L. Perovskite solar cells with a planar heterojunction structure prepared using room?temperature solution processing techniques. Nat Photon 8, 133?138 (2014).
3 Liu, M., Johnston, M. B. & Snaith, H. J. Efficient planar heterojunction perovskite solar cells by vapour deposition. Nature 501, 395?398 (2013).
4 Burschka, J. et al. Sequential deposition as a route to high?performance perovskite?sensitized solar cells. Nature 499, 316?319 (2013).
5 Malinkiewicz, O. et al. Perovskite solar cells employing organic charge transport layers. Nature Photonics 8, 128 (2014).