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Binary solvent system used to fabricate fully annealing-free perovskite solar cells

DOI: 10.1002/aenm.202203468 DOI Help

Authors: Elena J. Cassella (University of Sheffield) , Emma L. K. Spooner (University of Sheffield) , Joel A. Smith (University of Oxford) , Timothy Thornber (University of Sheffield) , Mary E. O'Kane (University of Sheffield) , Robert D. J. Oliver (University of Sheffield) , Thomas E. Catley (University of Sheffield) , Saqlain Choudhary (University of Oxford) , Christopher J. Wood (Power Roll Limited) , Deborah B. Hammond (University of Sheffield) , Henry J. Snaith (University of Oxford) , David G. Lidzey (University of Sheffield)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advanced Energy Materials , VOL 8

State: Published (Approved)
Published: February 2023
Diamond Proposal Number(s): 30612

Open Access Open Access

Abstract: High temperature post-deposition annealing of hybrid lead halide perovskite thin films—typically lasting at least 10 min—dramatically limits the maximum roll-to-roll coating speed, which determines solar module manufacturing costs. While several approaches for “annealing-free” perovskite solar cells (PSCs) have been demonstrated, many are of limited feasibility for scalable fabrication. Here, this work has solvent-engineered a high vapor pressure solvent mixture of 2-methoxy ethanol and tetrahydrofuran to deposit highly crystalline perovskite thin-films at room temperature using gas-quenching to remove the volatile solvents. Using this approach, this work demonstrates p-i-n devices with an annealing-free MAPbI3 perovskite layer achieving stabilized power conversion efficiencies (PCEs) of up to 18.0%, compared to 18.4% for devices containing an annealed perovskite layer. This work then explores the deposition of self-assembled molecules as the hole-transporting layer without annealing. This work finally combines the methods to create fully annealing-free devices having stabilized PCEs of up to 17.1%. This represents the state-of-the-art for annealing-free fabrication of PSCs with a process fully compatible with roll-to-roll manufacture.

Journal Keywords: annealing free; perovskite solar cells; self-assembled monolayers; solar energy

Diamond Keywords: Photovoltaics; Semiconductors

Subject Areas: Materials, Chemistry, Energy

Instruments: I07-Surface & interface diffraction

Added On: 13/02/2023 09:33

Advanced Energy Materials - 2023 - Cassella - Binary Solvent System Used to Fabricate Fully Annealing‐Free Perovskite Solar.pdf

Discipline Tags:

Surfaces Earth Sciences & Environment Sustainable Energy Systems Energy Physics Climate Change Physical Chemistry Energy Materials Chemistry Materials Science interfaces and thin films Perovskites Metallurgy

Technical Tags:

Scattering Wide Angle X-ray Scattering (WAXS) Grazing Incidence Wide Angle Scattering (GIWAXS)