Spray-coated organic solar cells with large-area of 12.25cm2

Abstract:The capability to fabricate photovoltaic (PV) solar cells on a large scale and at a competitive price is a milestone waiting to be achieved. Currently, such a fabrication method is lacking because the effective methods are either difficult to scale up or expensive due to the necessity for fabrication in a vacuum environment. Nevertheless, for a class of thin film solar cells, in which the solar cell materials can be processed in a solution, up scalable and vacuum-free fabrication techniques can be envisioned. In this context, all or some layers of polymer, dye-sensitized, quantum dot, and copper indium gallium selenide thin film solar cells illustrate some examples that may be processed in solution. The solution-processed materials may be transferred to the substrate by atomizing the solution and carrying the spray droplets to the substrate, a process that will form a thin film after evaporation of the solvent. Spray coating is performed at atmospheric pressure using low cost equipment with a roll-to-roll process capability, making it an attractive fabrication technique, provided that fairly uniform layers with high charge carrier separation and transport capability can be made. In this paper, the feasibility, the recent advances and challenges of fabricating spray-on thin film solar cells, the dynamics of spray and droplet impaction on the substrate, the photo-induced electron transfer in spray-on solar cells, the challenges on characterization and simulation, and the commercialization status of spray-on solar cells are discussed.

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“…Spray coating has been used to fabricate solar cells of 12.25 cm 2 area with a power conversion efficiency of 2.11% [34].…”

Section: Recent Advances On Spray-on Polymer Solar Cellsmentioning

confidence: 99%

Spray-on Thin Film PV Solar Cells: Advances, Potentials and Challenges

Eslamian

2014

Coatings

139

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“…There are a number of publications on spray coating of photovoltaic inks (Green et al, 2008;Hoth et al, 2009;Ishikawa et al, 2004;Steirer et al, 2009;Vak et al, 2007;Park et al, 2011;Susanna et al, 2011;Girotto et al, 2011). This deposition method is very efficient especially for low viscosity solutions and is less demanding in terms of ink formulation.…”

Section: Roll-to-roll Depositionmentioning

confidence: 99%

Organic Photovoltaics: Technologies and Manufacturing

Galagan¹,

Andriessen²

2012

Third Generation Photovoltaics

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“…In some recent works, progress has been made toward fabrication of high efficiency spray-on SCs in both organic and perovskite devices. 22,36,37 Spray coating of perovskite, compared to polymeric thin films, imposes additional challenges due to the crystalline nature of perovskite and crystal formation during the process, which may cause crystallization dewetting. 13 An incomplete and dewetted perovskite layer with excessive pinholes and voids may create shunt pathways, 24 causing charge recombination and a decline in the device performance.…”

Section: Introductionmentioning

confidence: 99%

Optimization of spray coating for the fabrication of sequentially deposited planar perovskite solar cells

2017

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Abstract. We use facile coating techniques including spray coating and drop casting to fabricate methylammonium lead iodide perovskite solar cells through a two-step sequential deposition approach. In the first step, for the deposition of the lead iodide, spray coating substitutes for the commonly used lab-scale spin coating, while the operating parameters of the former process are optimized to achieve a fully covered and uniform film of lead iodide. In the second step, to deposit methylammonium iodide atop the lead iodide layer to form methylammonium lead iodide perovskite, dip-coating process is replaced by the touch-free drop casting and scalable pulsed-spray coating. It is found that the performance of the perovskite films and devices made by pulsed-spray coating and drop casting is similar to those prepared by dip coating, while the large-scale production capabilities of such methods beside the low material consumptions of drop casting prove their potential to replace dip coating in large-scale manufacturing of perovskite solar cells. The champion devices fabricated by spray-drop and spin-drop techniques demonstrated power conversion efficiencies of 6.92% and 9.48%, respectively. It is expected that device fabrication in a low-humidity environment using the optimized parameters and optimization of other layers will result in higher efficiencies. © The Authors. Published by SPIE under aCreative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Spray-coated organic solar cells with large-area of 12.25cm2

Cited by 85 publications

References 18 publications

Spray-on Thin Film PV Solar Cells: Advances, Potentials and Challenges

Spray-on Thin Film PV Solar Cells: Advances, Potentials and Challenges

Organic Photovoltaics: Technologies and Manufacturing

Optimization of spray coating for the fabrication of sequentially deposited planar perovskite solar cells

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