Micrometer Sized Perovskite Crystals in Planar Hole Conductor Free Solar Cells

Shany Gamliel, Alex Dymshits, Sigalit Aharon, Eyal Terkieltaub, Lioz Etgar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

In this work we demonstrate the planar configuration on hole conductor (HTM) free perovskite based solar cells. The CH3NH3PbI3 perovskite was deposited using the spray technique to achieve micrometer size perovskite crystals. The number of spray passes changes the CH3NH3PbI3 film thickness; for example, 10 spray passes achieved a film thickness of 3.4 μm of perovskite. Surprisingly, power conversion efficiency of 6.9% was demonstrated for this novel, simple solar cell structure with thick perovskite film that has no HTM. Capacitance-voltage measurements reveal charge accumulation at the CH3NH3PbI3/Au interface while the compact TiO2/CH3NH3PbI3 junction showed a space charge region, which inhibits the recombination. Studying these interfaces is key to understanding the operation mechanism of this unique solar cell structure. This simple planar HTM free perovskite solar cell demonstrates the potential to make large-scale solar cells while maintaining a simple, low-cost architecture. (Figure Presented).

Original languageAmerican English
Pages (from-to)19722-19728
Number of pages7
JournalJournal of Physical Chemistry C
Volume119
Issue number34
DOIs
StatePublished - 27 Aug 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society 2015.

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