Fullerene Imposed High Voc in Evaporated Perovskite based Solar Cells.
Henk J. Bolink a, Michele Sessolo  a, Cristina Momblona a, Lidón Gil a
nanoGe Perovskite Conferences
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)
Barcelona, Spain, 2016 March 3rd - 4th
Organizers: Emilio Palomares and Nam-Gyu Park
Oral, Henk J. Bolink, presentation 071
Publication date: 14th December 2015
Perovskite based solar cells, mostly employ solution processed perovskite layers. Evaporated methylammonium lead iodide perovskite layers have also been reported and been employed in solar cells.1-3Our group has developed several perovskite based solar cells, using vacuum based perovskite preparation methods. These metal oxide free p-i-n type perovskite cells exhibit high power-conversion efficiencies.4-10Different commercially available fullerenes are evaluated as the hole blocking/electron transporting materials A significant enhancement of the solar cell performance can be obtained by selecting the proper fullerene derivative. Open-circuit voltages as high as 1.11 volts are obtained leading to power conversion efficiencies of 14.6 %.

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