Spray deposition of exfoliated MoS2 flakes as hole transport layer in perovskite-based photovoltaics

Capasso, A., Del Rio Castillo, A.E., Najafi, L., Pellegrini, V., Bonaccorso, F., Matteocci, F., Cinà, L., & Di Carlo, A. (2015) Spray deposition of exfoliated MoS2 flakes as hole transport layer in perovskite-based photovoltaics. In 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO), Rome, Italy, pp. 1138-1141.

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Abstract

We propose the use of solution-processed molybdenum disulfide (MoS2) flakes as hole transport layer (HTL) for metal-organic perovskite solar cells. MoS2 bulk crystals are exfoliated in 2-propanol and deposited on perovskite layers by spray coating. We fabricated cells with glass/FTO/compact-TiO2/mesoporous-TiO2/CH3NH3PbI3/spiro- OMeTAD/Au structure and cells with the same structure but with MoS2 flakes as HTL instead of spiro-OMeTAD, the most widely used HTL. The electrical characterization of the cells with MoS2 as HTL show promising power conversion efficiency -η- of 3.9% with respect to cells with pristine spiro-OMeTAD (η=3.1%). Endurance test on 800-hour shelf life has shown higher stability for the MoS2–based cells (ΔPCE/PCE=-17%) with respect to the doped spiro-OMeTAD-based one (ΔPCE/PCE =-45%). Further improvements are expected with the optimization of the MoS2 deposition process

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ID Code: 93201
Item Type: Conference Paper
Refereed: Yes
Keywords: Metal-organic perovskite solar cells, Two-dimensional materials (2DM), Transition metal dichalcogenide (TMDC) monolayers, LIquid phase exfoliation (LPE)
DOI: 10.1109/NANO.2015.7388825
ISBN: 9781467381567
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CONDENSED MATTER PHYSICS (020400) > Surfaces and Structural Properties of Condensed Matter (020406)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Compound Semiconductors (091203)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > NANOTECHNOLOGY (100700)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 IEEE
Copyright Statement: Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Deposited On: 24 Feb 2016 22:17
Last Modified: 26 Feb 2016 17:05

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