Organic solar cells all made by blade and slot–die coating techniques

[Display omitted] •PSCs all fabricated by doctor blade and slot-die coating techniques are presented.•The cathode, an eutectic alloy of 3 metals, was bladed at normal room atmosphere.•Good PV performance for PCSs/modules of 3 and 9cm2, respectively, was reached. In this work, polymeric solar cells w...

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Bibliographic Details
Published in:Solar energy 2017-04, Vol.146, p.79-84
Main Authors: Pérez-Gutiérrez, Enrique, Lozano, Juan, Gaspar-Tánori, Jorge, Maldonado, José-Luis, Gómez, Blanca, López, Leonardo, Amores-Tapia, Luis-Francisco, Barbosa-García, Oracio, Percino, María-Judith
Format: Article
Language:English
Subjects:
Butyric acid
Cathodes
Chloroform
Circuits
Deposition
Doctor blade and slot–die coating techniques
Energy conversion efficiency
Eutectic alloys
Fabrication
Field’s metal cathode
Melting point
Melting points
Modules
Open circuit voltage
Organic solar modules
Parameters
Photovoltaic cells
Photovoltaics
Short circuit currents
Short-circuit current
Slot dies
Solar cells
Solar energy
Substrates
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Summary:[Display omitted] •PSCs all fabricated by doctor blade and slot-die coating techniques are presented.•The cathode, an eutectic alloy of 3 metals, was bladed at normal room atmosphere.•Good PV performance for PCSs/modules of 3 and 9cm2, respectively, was reached. In this work, polymeric solar cells with the configuration anode/Hole Transport Layer (HTL)/Active Layer/Cathode, with an active area of 3cm2 were fabricated layer by layer, including the cathode, by doctor blade and slot–die techniques at normal room atmosphere and temperatures about 90°C for cathode deposition. Further, small modules were built on a single substrate with 3 cells connected in series (active area of 9cm2). The best electrical parameters for single cells were open circuit voltage (Voc)=571mV, short circuit current density (Jsc)=7.69mA/cm2, fill factor (FF)=0.55, and power conversion efficiency (PCE)=2.4%, meanwhile for modules Voc=1.54V, Jsc=2.09mA/cm2, FF=0.55, and PCE=2.1%. The main parameters of the deposition technique such as substrate temperature, blade speed and bar–substrate gap were evaluated to ensure the best photovoltaic (PV) device performance. For the active layer, a co–solvent system based on chloroform and 1,8 diioodoctane was used to dissolve the blend poly(3–hexilthiophene–2,5dyil): [6,6]–Phenyl–C71–butyric acid methyl ester (P3HT:PC71BM). The utilized cathode, named Field’s metal, was an eutectic alloy of Bi:In:Sn (32.5:51:16.5%) with a melting point about 65°C; thus, this metal is easily melted and deposited by blading process on the active area. The obtained PV parameters demonstrate high viability of the bar coating process both for the fabrication of solar cells and small solar modules.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2017.02.004