Perovskite Solar Cells Prepared in Ambient Conditions based on an HTM-Free Architecture that has a Back Contact Deposited from a Paste made with Graphite, Black Carbon, Mai and PVDF Dispersed in Chlorobenzene

  1. Llarena, E.
  2. González-Pérez, S.
  3. González-Diaz, B. 1
  4. Ocaña, L.
  5. Montes, C.
  1. 1 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Actas:
8th World Conference on Photovoltaic Energy Conversion

Editorial: WIP

ISBN: 3-936338-86-8

Año de publicación: 2022

Páginas: 306-312

Tipo: Aportación congreso

DOI: 10.4229/WCPEC-82022-2AV.1.35 GOOGLE SCHOLAR lock_openAcceso abierto editor

Resumen

In this work an improved carbon-based composite and a simplified architecture has been developed to produce and deposit a back contact to fabricate HTM-free Perovskite Solar Cells in ambient conditions. A batch of cells were produced that had efficiencies stabilized at about 1%, with a record value of 1.646%. Estimations of the devices’ serial and shunt resistances were also obtained, resulting on 2kΩ and 200Ω respectively, which indicates that, on the one hand, they are still too inefficient at allowing the flow of the photo-generated electrons and, on the other, that alternative recombination pathways yet exist, which further hamper their efficiencies. Also, the observed phenomena of IV curve hysteresis (between the forward and reverse measurements), together with a yellowing of the perovskite layers after completing a set of tests under continuous illumination, suggest that substantial ionic shift happens in the crystal lattice, that also contributed to its degradation. In order to compensate these effects, different strategies were proposed, which will be tested in future iterations.