Speaker
Description
The continuous dynamic development of organic electronics has resulted in recent years, and new material solutions are still required for the construction of various devices, including photovoltaic (PV) cells. Among the new generation of PV devices, perovskite solar cells (PSCs) deserve special attention. The efficiency of PSCs increased from 3.9% in 2009 to 24% in 2019. Important elements of this type of solar cell are hole-transporting materials (HTMs). They play a significant role in the transportation of the holes to the counter-electrode both and in the regeneration of the oxidized state light absorbers. HTMs should exhibit appropriate highest occupied molecular orbital (HOMO) energy level for matching with the valence band energy of perovskite materials (together with ensuring holes injection and transporting at each interface), high hole mobility and photochemical stability, light absorption in the visible and near-IR spectral region, suitable solubility in organic solvents and good film-forming ability [1-3].
The presented results include fundamental research, i.e. the relationships between the chemical structure of the applied compound and crucial properties in organic electronics were determined, as well as the construction of FTO/b-TiO2/m-TiO2/perovskite/HTM/Au cells. The used compounds’ chemical structure (HTMs) was confirmed by spectroscopic methods (1H and 13C NMR and FT-IR) and elemental analysis. Selected physicochemical properties of the compounds (thermal, electrochemical, absorption, emission) were tested, allowing to determine their application possibilities.
References:
[1] Z. H. Bakr, Q. Wali, A. Fakharuddin, L. Schmidt-Mende, T. M. Brown, R. Jose, Advances in hole transport materials engineering for stable and efficient perovskite solar cells, Nano Energy, 34 (2017) 271-305.
[2] X. Zhao, M. Wang, Organic hole-transporting materials for efficient perovskite solar cells, Materials Today Energy, 7, (2018), 208-220.
[3] E. Aydin, M. De Bastiani, S. De Wolf, Defect and Contact Passivation for Perovskite Solar Cells, Advanced Materials, 31(25), (2019), 1900428.
| Speaker Country | POLAND |
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