resumo
In the last decade, organic-inorganic hybrid halide perovskite materials have developed into a very large research area in photovoltaics and optoelectronics as promising light harvesters. Lead-free double perovskites have recently been investigated as an environmentally friendly alternative to the lead-containing compositions. However, lead-free organic-inorganic hybrid halide double perovskites have so far rarely been produced due to a certain complexity in their synthesis. A number of small molecular cations have been investigated, but compositions containing azetidinium, which is a 4-membered heterocyclic molecular ring, on the A-site have hardly been considered. This study investigates the potential of [(CH2)(3)NH2](2)AgBiBr6 as an optical absorber in photovoltaics or optoelectronics. The use of this alternative cation changes the crystal symmetry significantly. Columns of alternating metal cation form which are separated by the organic ions. While crystal symmetry is rather different from the perovskites, the overall properties as an absorber are similar. It is thus worthwhile to further investigate alternate hybrid compositions which form into other symmetries than the perovskite base structure.
palavras-chave
HALIDE DOUBLE PEROVSKITES; UV-LIGHT STABILITY; SOLAR-CELLS; IODIDE
categoria
Chemistry
autores
Jin, YU; Marler, B; Karabanov, AD; Winkler, K; Yap, ICJ; Dubey, A; Spee, L; Castillo, ME; Muckel, F; Salak, AN; Benson, N; Lupascu, DC
nossos autores
Andrei Salak
Investigador PrincipalProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
A. N. S. acknowledges the support of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PID-DAC). Fruitful discussions with Vladimir V. Shvartsman and Peter Bloechl are highly acknowledged. D. C. L., N. B., A. K. and Y. U. J. acknowledge funding through the German Science Foundation (Deutsche Forschungsgemeinschaft, DFG) under project number 424708448.